Home » Public Forums » GMCnet » Smoke in the Cabin
| Smoke in the Cabin [message #223390] |
Sun, 22 September 2013 20:47  |
Steve
Messages: 506
Registered: September 2013
Location: East Greenville, Pa
Karma: 1
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Senior Member |
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I took the GMC out for a drive this afternoon. After a few miles I smelled something burning and the cabin filled with smoke. I pulled off the road and grabbed the fire extinguisher before opening the hatch. No fire, just a little more smoke from something electrical. It was a very strong electrical burning smell. I checked under the hatch and under the coach and could not find any burned wires or other damage. The engine started back up and seemed to run fine and I made it back home ok.
Generator light is now lit on the dash and battery voltage is dropping. I suspect alternator but it didn't smell as if it were burnt. I removed the alternator and will take to Autozone tomorrow for testing.
Any other thoughts other than alternator?
I know I read about some dash wires burning up and catching fire when the alternator fails. Maybe I have been a victim of the burning wire but no fire? When I read about that I was going to order the special wire harness that was supposed to prevent that. Maybe I should have gone with my first instinct? I guess I better change those oil cooler lines and grease the front wheel bearings too. Those were the other two things I wanted to do before really taking her out on the road.
Any thoughts would be appreciated.
1978 GMC Royal
Eastern Pennslyvania
1968 Chevrolet C20 396 Camper Special
1969 Chevrolet C20 Camper Special
1985 Buick Electra Park Avenue
1992 Camaro 25th Anniversary Heretage Edition Black
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| Re: [GMCnet] Smoke in the Cabin [message #223395 is a reply to message #223390] |
Sun, 22 September 2013 21:35  |
powerjon
Messages: 2446
Registered: January 2004
Karma: 5
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Senior Member |
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Steve,
Did you have an Alternator protection cable installed on your coach? If not you may have burned up the wiring under the dash.
http://gmcmotorhome.info/APC.html
I think that Jim K markets this item for Gene F.
JR Wright
78 Buskirk Stretch
75 Avion
Michigan
On Sep 22, 2013, at 9:47 PM, Steve Adams <sjadams@ptd.net> wrote:
>
>
> I took the GMC out for a drive this afternoon. After a few miles I smelled something burning and the cabin filled with smoke. I pulled off the road and grabbed the fire extinguisher before opening the hatch. No fire, just a little more smoke from something electrical. It was a very strong electrical burning smell. I checked under the hatch and under the coach and could not find any burned wires or other damage. The engine started back up and seemed to run fine and I made it back home ok.
>
> Generator light is now lit on the dash and battery voltage is dropping. I suspect alternator but it didn't smell as if it were burnt. I removed the alternator and will take to Autozone tomorrow for testing.
>
> Any other thoughts other than alternator?
>
> I know I read about some dash wires burning up and catching fire when the alternator fails. Maybe I have been a victim of the burning wire but no fire? When I read about that I was going to order the special wire harness that was supposed to prevent that. Maybe I should have gone with my first instinct? I guess I better change those oil cooler lines and grease the front wheel bearings too. Those were the other two things I wanted to do before really taking her out on the road.
>
> Any thoughts would be appreciated.
> --
> 1978 GMC Royal
> 1968 Chevrolet C20 396 Camper Special
> 1969 Chevrolet C20 Camper Special
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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J.R. Wright
GMC GreatLaker
GMC Eastern States
GMCMI
78 30' Buskirk Stretch
75 Avion Under Reconstruction
Michigan
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| Re: [GMCnet] Smoke in the Cabin [message #223403 is a reply to message #223396] |
Mon, 23 September 2013 03:16 |
Mr ERFisher
Messages: 7117
Registered: August 2005
Karma: 2
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Senior Member |
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here is a description of the rear cable problem
http://gmcmotorhome.info/chassis.html#Rear
check all the wiring , grounds, and power, looking around for wires
rubbing and shorting out
YOU SELDOM RECOVER FROM THE ALTERNATOR FAILURE DESCRIBED.
so the problem was probably not this failure
but
everyone should have the APC protection, it is not too late.
http://gmcmotorhome.info/APC.html
but
find the problem, it will not go away by it's self
gene
On Sun, Sep 22, 2013 at 8:21 PM, larry.whisler <larry.whisler@hotmail.com>wrote:
>
>
> Could the heavy battery cable that runs the length of the coach from the
> rear house batteries to the front boost connection be shorting out against
> the frame?
>
> I am not familiar with Royale wiring but it would seem to me with that
> much smoke, a normal gauge wire would be completely fried whereas a heavy
> cable could temporarily short out and heat up causing the amount of smoke
> indicated and then unground itself to stop smoking the wire.
>
> Check the front of the coach where the wire crosses over from the driver's
> side to the boost connections.
>
> larry
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
--
Gene Fisher -- 74-23,77PB/ore/ca
“Give a man a fish; you have fed him for today --- give him a URL and
-------
http://gmcmotorhome.info/
Alternator Protection Cable
http://gmcmotorhome.info/APC.html
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| Re: [GMCnet] Smoke in the Cabin [message #223413 is a reply to message #223403] |
Mon, 23 September 2013 07:35 |
Steve
Messages: 506
Registered: September 2013
Location: East Greenville, Pa
Karma: 1
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Senior Member |
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Thanks to everyone for the information, even if it is bad news. I should have had the protection cable.
If I understand correctly, the alternator failure was likely due to a short, possibly a very large short?
Everything else seems to function fine, including the house power and the starting and ignition system. I will get the alternator tested today and inspect all wiring,including the wire bundle under the dash.
1978 GMC Royal
Eastern Pennslyvania
1968 Chevrolet C20 396 Camper Special
1969 Chevrolet C20 Camper Special
1985 Buick Electra Park Avenue
1992 Camaro 25th Anniversary Heretage Edition Black
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| Re: Smoke in the Cabin [message #223425 is a reply to message #223390] |
Mon, 23 September 2013 10:07 |
Otterwan
Messages: 946
Registered: July 2013
Location: Lynnwood (north of Seattl...
Karma: 0
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Senior Member |
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Sorry, I know this isn't funny, but every time I see the title to your post all I can think of is:
Smoooooke in the caaaaaa-bin....fire in the sky.....
Smoooooke in the caaaaaa-bin....
Dun dun dun, dun dun du-dun, dun dun dun, dun dun-dun.....
1977 Birchaven, Lynnwood WA - "We may not be able to stop all evil in the world, but I know that how we treat one another is entirely up to us."
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| Re: Smoke in the Cabin [message #223482 is a reply to message #223390] |
Mon, 23 September 2013 20:45 |
Steve
Messages: 506
Registered: September 2013
Location: East Greenville, Pa
Karma: 1
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Senior Member |
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Ok. So the alternator passed a bench test at two different parts stores. I have also read the posts about inspecting the main wire harness behind the dash and replacing this circuit with proper connections,diodes, and resistors.
I split open the wire harness and could find no sign of any heat or damage. Generator light is still on when engine is running. The only place there is lingering smell is from the glove box/main fuse block area, but wires appear to all be in tact both indie and outside of the fuze block. Voltage across the battery posts with engine running is 11.9 volts. I assume this is low enough to trigger the generator light.
Not sure what to do next. I will probably order a new alternator as the bearings don't sound great and I want to build in ome reliability. Thinking about a double pulley set up to run double belts. Will also order the protection harness mustn't in case my circuit is still ok.
Tomorrow I will search further for any signs of shorts or burned wires. I did not get a good look ar the starter motor area yet.
1978 GMC Royal
Eastern Pennslyvania
1968 Chevrolet C20 396 Camper Special
1969 Chevrolet C20 Camper Special
1985 Buick Electra Park Avenue
1992 Camaro 25th Anniversary Heretage Edition Black
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| Re: [GMCnet] Smoke in the Cabin [message #223485 is a reply to message #223482] |
Mon, 23 September 2013 21:38 |
Terry Taylor
Messages: 113
Registered: October 2004
Location: San Lorenzo, CA
Karma: 0
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Senior Member |
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Steve,
There are 3 wires to/from the alternator. Obviously, the heavy red
one is the alternator output. The other 2 (on the small plug-in connector)
are a #12 Red and a #16 Brown. The #16 brown is the wire that has the piece
of resistance wire in it's circuit that runs through the wiring harness in
the dash. Its purpose is to supply voltage to the field coil on the
alterrnator to "jump start" power generation until the alternator begins to
self excite. The #12 red wire is the "sense" wire to the alternator, it
senses the voltage that gets to the battery so that the alternator can set
its voltage.
Since your alternator output is low, we can (generally) rule out an issue
with the #12 red, as when it is not connected, the alternator output will
generally go high.
I STRONGLY suggest that you trace the #16 (which becomes a #16 brown
w/white stripe once it gets inside the dash). I bet that you will find
that it is open (burned). If that is the case, you should replace it with
either a 10 ohm 10 watt resistor, or (better yet) with a solid piece of
wire and Gene Fisher's APC cable.
On Mon, Sep 23, 2013 at 6:45 PM, Steve Adams <sjadams@ptd.net> wrote:
>
>
> Ok. So the alternator passed a bench test at two different parts stores. I
> have also read the posts about inspecting the main wire harness behind the
> dash and replacing this circuit with proper connections,diodes, and
> resistors.
>
> I split open the wire harness and could find no sign of any heat or
> damage. Generator light is still on when engine is running. The only place
> there is lingering smell is from the glove box/main fuse block area, but
> wires appear to all be in tact both indie and outside of the fuze block.
> Voltage across the battery posts with engine running is 11.9 volts. I
> assume this is low enough to trigger the generator light.
>
> Not sure what to do next. I will probably order a new alternator as the
> bearings don't sound great and I want to build in ome reliability. Thinking
> about a double pulley set up to run double belts. Will also order the
> protection harness mustn't in case my circuit is still ok.
>
> Tomorrow I will search further for any signs of shorts or burned wires. I
> did not get a good look ar the starter motor area yet.
> --
> 1978 GMC Royal
> 1968 Chevrolet C20 396 Camper Special
> 1969 Chevrolet C20 Camper Special
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
--
Terry Taylor
74 ex-Eleganza SE
San Lorenzo. CA
Merchanise Web Site: http://www.dldesignstore.com
Duct tape is like the force.....
It has a light side and a dark side and
It holds the galaxy together.
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| Re: Smoke in the Cabin [message #223503 is a reply to message #223425] |
Tue, 24 September 2013 07:16 |
Steve
Messages: 506
Registered: September 2013
Location: East Greenville, Pa
Karma: 1
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Senior Member |
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I appreciate the humor.
1978 GMC Royal
Eastern Pennslyvania
1968 Chevrolet C20 396 Camper Special
1969 Chevrolet C20 Camper Special
1985 Buick Electra Park Avenue
1992 Camaro 25th Anniversary Heretage Edition Black
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| Re: [GMCnet] Smoke in the Cabin [message #223505 is a reply to message #223485] |
Tue, 24 September 2013 07:24 |
Steve
Messages: 506
Registered: September 2013
Location: East Greenville, Pa
Karma: 1
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Senior Member |
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Terry,
Thanks for the additional info on the #16 brown wire. I will track it down and test for continuity. As you suggest, it is probably blown. I will replace it with a separate circuit of proper wire and electronics.
I am hoping this will take care of it and there was not further damage. I may have gotten lucky because everything else seems to work (except furnace and generator, which are projects in process). I will post on my generator adventures once I get this one taken care of. In the mean time I have been reading all of the Onan posts and trying to get up to speed on that.
1978 GMC Royal
Eastern Pennslyvania
1968 Chevrolet C20 396 Camper Special
1969 Chevrolet C20 Camper Special
1985 Buick Electra Park Avenue
1992 Camaro 25th Anniversary Heretage Edition Black
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| Re: Smoke in the Cabin [message #223729 is a reply to message #223390] |
Fri, 27 September 2013 11:27 |
Steve
Messages: 506
Registered: September 2013
Location: East Greenville, Pa
Karma: 1
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Senior Member |
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Ok. I have a quick update. First I have ordered an APC cable from Gene Fisher. I also got a new alternator and installed this morning. I tested the alternator light with the key on and it glowed bright as it is supposed to. After starting the engine it glowed dim and the belt was "chirping" as if it were too loose. I tightened the belt up more, started again and the alternator light goes completely out and everything seems to be working correctly in terms of the alternator light.
If the light is functioning correctly, does that mean that the two wires are in tact? 1. a switched wire from the fuse block, and 2. the #16 brown with white stripe nichrome wire from the alternator.
I am going to go out now and try to trace the nichrome wire by testing continuity an looking for breaks. Based upon the functionality of the alternator light, it seems like it is likely still in tact? otherwise the alternator light would not function correctly?
Other than tracing and testing the nichrome wire I am going to do no further testing, running, or driving until I get the APC cable and get it installed.
When the engine was idling I did begin to smell something burning again but could not tell where it was coming from. I shut the engine down and tried to sniff out the burning smell but no luck. It did not appear to be coming from the open dash wiring. It seemed more like engine bay or fuse block. Anyway, like I said I am going to resist any further testing until I have the APC cable in place for protection.
Any thought would be appreciated.
1978 GMC Royal
Eastern Pennslyvania
1968 Chevrolet C20 396 Camper Special
1969 Chevrolet C20 Camper Special
1985 Buick Electra Park Avenue
1992 Camaro 25th Anniversary Heretage Edition Black
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| Re: [GMCnet] Smoke in the Cabin [message #223748 is a reply to message #223729] |
Fri, 27 September 2013 13:40 |
Mr ERFisher
Messages: 7117
Registered: August 2005
Karma: 2
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Senior Member |
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Monochrome wires are ok if the alternator is ok
wire will not even get warm at under 40 volts
Gene
On Friday, September 27, 2013, Steve Adams <sjadams@ptd.net> wrote:
>
>
> Ok. I have a quick update. First I have ordered an APC cable from Gene
Fisher. I also got a new alternator and installed this morning. I tested
the alternator light with the key on and it glowed bright as it is supposed
to. After starting the engine it glowed dim and the belt was "chirping" as
if it were too loose. I tightened the belt up more, started again and the
alternator light goes completely out and everything seems to be working
correctly in terms of the alternator light.
>
> If the light is functioning correctly, does that mean that the two wires
are in tact? 1. a switched wire from the fuse block, and 2. the #16 brown
with white stripe nichrome wire from the alternator.
>
> I am going to go out now and try to trace the nichrome wire by testing
continuity an looking for breaks. Based upon the functionality of the
alternator light, it seems like it is likely still in tact? otherwise the
alternator light would not function correctly?
>
> Other than tracing and testing the nichrome wire I am going to do no
further testing, running, or driving until I get the APC cable and get it
installed.
>
> When the engine was idling I did begin to smell something burning again
but could not tell where it was coming from. I shut the engine down and
tried to sniff out the burning smell but no luck. It did not appear to be
coming from the open dash wiring. It seemed more like engine bay or fuse
block. Anyway, like I said I am going to resist any further testing until
I have the APC cable in place for protection.
>
> Any thought would be appreciated.
> --
> 1978 GMC Royal
> 1968 Chevrolet C20 396 Camper Special
> 1969 Chevrolet C20 Camper Special
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
--
Gene Fisher -- 74-23,77PB/ore/ca
“Give a man a fish; you have fed him for today --- give him a URL and
-------
http://gmcmotorhome.info/
Alternator Protection Cable
http://gmcmotorhome.info/APC.html
_______________________________________________
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| Re: [GMCnet] Smoke in the Cabin [message #223757 is a reply to message #223729] |
Fri, 27 September 2013 14:43 |
Mr ERFisher
Messages: 7117
Registered: August 2005
Karma: 2
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Senior Member |
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On Fri, Sep 27, 2013 at 9:27 AM, Steve Adams <sjadams@ptd.net> wrote:
>
>
> Ok. I have a quick update. First I have ordered an APC cable from Gene
> Fisher.
send me your address, and I will mail it today
gene
> I also got a new alternator and installed this morning. I tested the
> alternator light with the key on and it glowed bright as it is supposed to.
> After starting the engine it glowed dim and the belt was "chirping" as if
> it were too loose. I tightened the belt up more, started again and the
> alternator light goes completely out and everything seems to be working
> correctly in terms of the alternator light.
>
> If the light is functioning correctly, does that mean that the two wires
> are in tact? 1. a switched wire from the fuse block, and 2. the #16 brown
> with white stripe nichrome wire from the alternator.
>
> I am going to go out now and try to trace the nichrome wire by testing
> continuity an looking for breaks. Based upon the functionality of the
> alternator light, it seems like it is likely still in tact? otherwise the
> alternator light would not function correctly?
>
> Other than tracing and testing the nichrome wire I am going to do no
> further testing, running, or driving until I get the APC cable and get it
> installed.
>
> When the engine was idling I did begin to smell something burning again
> but could not tell where it was coming from. I shut the engine down and
> tried to sniff out the burning smell but no luck. It did not appear to be
> coming from the open dash wiring. It seemed more like engine bay or fuse
> block. Anyway, like I said I am going to resist any further testing until
> I have the APC cable in place for protection.
>
> Any thought would be appreciated.
> --
> 1978 GMC Royal
> 1968 Chevrolet C20 396 Camper Special
> 1969 Chevrolet C20 Camper Special
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
--
Gene Fisher -- 74-23,77PB/ore/ca
“Give a man a fish; you have fed him for today --- give him a URL and
-------
http://gmcmotorhome.info/
Alternator Protection Cable
http://gmcmotorhome.info/APC.html
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
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| Re: [GMCnet] Smoke in the Cabin [message #223765 is a reply to message #223748] |
Fri, 27 September 2013 15:17 |
k2gkk
Messages: 4452
Registered: November 2009
Karma: -8
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Senior Member |
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Then what causes the NICHROME wire to over heat and burn the harness? Must be huge overvoltage and resultant overcurrent to my mind.
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
~~ ~ D C "Mac" Macdonald ~ ~~
~ ~ Amateur Radio - K2GKK ~ ~
~ ~ USAF and FAA, Retired ~ ~
~ ~ ~ Oklahoma City, OK ~ ~ ~
~~ ~ ~ "The Money Pit" ~ ~ ~~
~ ~ ~ ~ TZE166V101966 ~ ~ ~ ~
~ ~ ~ '76 ex-Palm Beach ~ ~ ~
~~ k2gkk + hotmail dot com ~~
~ www.gmcmhphotos.com/okclb ~
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
______________
*[ ]~~~[][ ][|\
*--OO--[]---O-*
> Date: Fri, 27 Sep 2013 11:40:19 -0700
> From: mr.erfisher@gmail.com
> To: gmclist@temp.gmcnet.org
> Subject: Re: [GMCnet] Smoke in the Cabin
>
> Monochrome wires are ok if the alternator is ok
> wire will not even get warm at under 40 volts
>
> Gene
>
> On Friday, September 27, 2013, Steve Adams <sjadams@ptd.net> wrote:
> >
> >
> > Ok. I have a quick update. First I have ordered an APC cable from Gene
> Fisher. I also got a new alternator and installed this morning. I tested
> the alternator light with the key on and it glowed bright as it is supposed
> to. After starting the engine it glowed dim and the belt was "chirping" as
> if it were too loose. I tightened the belt up more, started again and the
> alternator light goes completely out and everything seems to be working
> correctly in terms of the alternator light.
> >
> > If the light is functioning correctly, does that mean that the two wires
> are in tact? 1. a switched wire from the fuse block, and 2. the #16 brown
> with white stripe nichrome wire from the alternator.
> >
> > I am going to go out now and try to trace the nichrome wire by testing
> continuity an looking for breaks. Based upon the functionality of the
> alternator light, it seems like it is likely still in tact? otherwise the
> alternator light would not function correctly?
> >
> > Other than tracing and testing the nichrome wire I am going to do no
> further testing, running, or driving until I get the APC cable and get it
> installed.
> >
> > When the engine was idling I did begin to smell something burning again
> but could not tell where it was coming from. I shut the engine down and
> tried to sniff out the burning smell but no luck. It did not appear to be
> coming from the open dash wiring. It seemed more like engine bay or fuse
> block. Anyway, like I said I am going to resist any further testing until
> I have the APC cable in place for protection.
> >
> > Any thought would be appreciated.
> > --
> > 1978 GMC Royal
> > 1968 Chevrolet C20 396 Camper Special
> > 1969 Chevrolet C20 Camper Special
> > _______________________________________________
> > GMCnet mailing list
> > Unsubscribe or Change List Options:
> > http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
> >
>
> --
> Gene Fisher -- 74-23,77PB/ore/ca
> “Give a man a fish; you have fed him for today --- give him a URL and
> -------
> http://gmcmotorhome.info/
> Alternator Protection Cable
> http://gmcmotorhome.info/APC.html
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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| Re: [GMCnet] Smoke in the Cabin [message #223766 is a reply to message #223765] |
Fri, 27 September 2013 15:28 |
Mr ERFisher
Messages: 7117
Registered: August 2005
Karma: 2
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Senior Member |
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yep it is an alternator failure
they can put out 100 volts with a alternator failure
here is a test i did about 5 years ago
http://www.gmcmhphotos.com/photos/g3600-nichrome-wire-test.html
there is nothing wrong with the gmc charging ckt, just need to block the
high reverse voltage from the alternator
and
and
the alternator still starts right away
no 5 min delay
On Fri, Sep 27, 2013 at 1:17 PM, D C _Mac_ Macdonald <k2gkk@hotmail.com>wrote:
> Then what causes the NICHROME wire to over heat and burn the harness?
> Must be huge overvoltage and resultant overcurrent to my mind.
>
> ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
> ~~ ~ D C "Mac" Macdonald ~ ~~
> ~ ~ Amateur Radio - K2GKK ~ ~
> ~ ~ USAF and FAA, Retired ~ ~
> ~ ~ ~ Oklahoma City, OK ~ ~ ~
> ~~ ~ ~ "The Money Pit" ~ ~ ~~
> ~ ~ ~ ~ TZE166V101966 ~ ~ ~ ~
> ~ ~ ~ '76 ex-Palm Beach ~ ~ ~
> ~~ k2gkk + hotmail dot com ~~
> ~ www.gmcmhphotos.com/okclb ~
> ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
> ______________
> *[ ]~~~[][ ][|\
> *--OO--[]---O-*
>
>
>
>
>
> > Date: Fri, 27 Sep 2013 11:40:19 -0700
> > From: mr.erfisher@gmail.com
> > To: gmclist@temp.gmcnet.org
> > Subject: Re: [GMCnet] Smoke in the Cabin
> >
> > Monochrome wires are ok if the alternator is ok
> > wire will not even get warm at under 40 volts
> >
> > Gene
> >
> > On Friday, September 27, 2013, Steve Adams <sjadams@ptd.net> wrote:
> > >
> > >
> > > Ok. I have a quick update. First I have ordered an APC cable from Gene
> > Fisher. I also got a new alternator and installed this morning. I tested
> > the alternator light with the key on and it glowed bright as it is
> supposed
> > to. After starting the engine it glowed dim and the belt was "chirping"
> as
> > if it were too loose. I tightened the belt up more, started again and the
> > alternator light goes completely out and everything seems to be working
> > correctly in terms of the alternator light.
> > >
> > > If the light is functioning correctly, does that mean that the two
> wires
> > are in tact? 1. a switched wire from the fuse block, and 2. the #16 brown
> > with white stripe nichrome wire from the alternator.
> > >
> > > I am going to go out now and try to trace the nichrome wire by testing
> > continuity an looking for breaks. Based upon the functionality of the
> > alternator light, it seems like it is likely still in tact? otherwise the
> > alternator light would not function correctly?
> > >
> > > Other than tracing and testing the nichrome wire I am going to do no
> > further testing, running, or driving until I get the APC cable and get it
> > installed.
> > >
> > > When the engine was idling I did begin to smell something burning again
> > but could not tell where it was coming from. I shut the engine down and
> > tried to sniff out the burning smell but no luck. It did not appear to be
> > coming from the open dash wiring. It seemed more like engine bay or fuse
> > block. Anyway, like I said I am going to resist any further testing until
> > I have the APC cable in place for protection.
> > >
> > > Any thought would be appreciated.
> > > --
> > > 1978 GMC Royal
> > > 1968 Chevrolet C20 396 Camper Special
> > > 1969 Chevrolet C20 Camper Special
> > > _______________________________________________
> > > GMCnet mailing list
> > > Unsubscribe or Change List Options:
> > > http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
> > >
> >
> > --
> > Gene Fisher -- 74-23,77PB/ore/ca
> > “Give a man a fish; you have fed him for today --- give him a URL and
> > -------
> > http://gmcmotorhome.info/
> > Alternator Protection Cable
> > http://gmcmotorhome.info/APC.html
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
--
Gene Fisher -- 74-23,77PB/ore/ca
“Give a man a fish; you have fed him for today --- give him a URL and
-------
http://gmcmotorhome.info/
Alternator Protection Cable
http://gmcmotorhome.info/APC.html
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| Re: [GMCnet] Smoke in the Cabin [message #223768 is a reply to message #223729] |
Fri, 27 September 2013 15:31 |
Emery Stora
Messages: 959
Registered: January 2011
Karma: 4
|
Senior Member |
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You would no doubt find the nichrome wire intact. The problem is that the nichrome wire heats up and burns the insulation from the other wires in the bundle and they short out.
Emery Stora
On Sep 27, 2013, at 11:27 AM, Steve Adams <sjadams@ptd.net> wrote:
>
>
> Ok. I have a quick update. First I have ordered an APC cable from Gene Fisher. I also got a new alternator and installed this morning. I tested the alternator light with the key on and it glowed bright as it is supposed to. After starting the engine it glowed dim and the belt was "chirping" as if it were too loose. I tightened the belt up more, started again and the alternator light goes completely out and everything seems to be working correctly in terms of the alternator light.
>
> If the light is functioning correctly, does that mean that the two wires are in tact? 1. a switched wire from the fuse block, and 2. the #16 brown with white stripe nichrome wire from the alternator.
>
> I am going to go out now and try to trace the nichrome wire by testing continuity an looking for breaks. Based upon the functionality of the alternator light, it seems like it is likely still in tact? otherwise the alternator light would not function correctly?
>
> Other than tracing and testing the nichrome wire I am going to do no further testing, running, or driving until I get the APC cable and get it installed.
>
> When the engine was idling I did begin to smell something burning again but could not tell where it was coming from. I shut the engine down and tried to sniff out the burning smell but no luck. It did not appear to be coming from the open dash wiring. It seemed more like engine bay or fuse block. Anyway, like I said I am going to resist any further testing until I have the APC cable in place for protection.
>
> Any thought would be appreciated.
> --
> 1978 GMC Royal
> 1968 Chevrolet C20 396 Camper Special
> 1969 Chevrolet C20 Camper Special
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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