| No alternater current [message #289099] |
Wed, 21 October 2015 13:56  |
appie
Messages: 902
Registered: April 2013
Location: denmark
Karma: 2
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I have been expecting this to happen. Today in a tunnel I could see the idiotlight glow. On arrival at the camperstop I measured no charge from the alternator and the house batteries down 40 a/h. After driving 2 houres with the fridge on 12 volts
As all wiring seems to be ok. I change the altrrnator for the used one I bought in Holland. That did not help. Now it is possible they both are bad. I could hear bad bearing when I held a screwdriver to the old one.
There are no shops that can test a gm alternator here. It should be possible to find a new one somwhere and I have a repairset on the way to Danmark
Some of you might remember that I mentioned that it seemed that my house batterie were not charged properly a while back
Amy hints are welcome. Also any idear on how many amps are used just for the ignition and fuelpump.? I can cut of the blower. That would just leave the occasional braklight and indicator
Appie
eleganza 76 "Olga" now sadly sold
6 wheel discbrake
Quadrabags
Springfield stage 2 462 olds
Manny tranny
( pictures at http://www.gmcmhphotos.com/photos/g6489-olga.html
Fulltiming in Europe july 2014 til july 2016
Denmark
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| Re: No alternater current [message #289109 is a reply to message #289099] |
Wed, 21 October 2015 15:10  |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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Appie, I'm gonna bet your alternator either wore out the brushes (first choice) or the internal regulator failed (second choice). Go through the test sequence listed above and see what you get. I just put brushes and regulator in mine. The hardest part you'll have is finding the parts.
Also, before dissing the alternator, check the fusible link which runs from the chassis 12volt point into one of the wiring harnesses. If it's open, no charge.
--johnny
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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| Re: No alternater current [message #289111 is a reply to message #289109] |
Wed, 21 October 2015 15:33 |
appie
Messages: 902
Registered: April 2013
Location: denmark
Karma: 2
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Yes. i went through that checklist. That tels me. Bad alternater or regulator. " fuseable link" ? No idear what that is ?
Appie
eleganza 76 "Olga" now sadly sold
6 wheel discbrake
Quadrabags
Springfield stage 2 462 olds
Manny tranny
( pictures at http://www.gmcmhphotos.com/photos/g6489-olga.html
Fulltiming in Europe july 2014 til july 2016
Denmark
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| Re: No alternater current [message #289112 is a reply to message #289099] |
Wed, 21 October 2015 15:34 |
JohnL455
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
Karma: 12
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Do you have shore power / generator and convertor? If so then jumper the outer 2 terminals of the isolator (or the boost solenoid) to get both your banks back to full charge. You could run the gen while driving at least every so often to get by
John Lebetski
Woodstock, IL
77 Eleganza II
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| Re: No alternater current [message #289114 is a reply to message #289112] |
Wed, 21 October 2015 16:17 |
appie
Messages: 902
Registered: April 2013
Location: denmark
Karma: 2
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No generator. But am on shore power now to fill all batteries. That gives me 300A/hr. Or 150 A/hr to use. Thats why i wondered howmuch she is using for just driving
Still wondering about that fusable link Johnniy mentiones
Appie
eleganza 76 "Olga" now sadly sold
6 wheel discbrake
Quadrabags
Springfield stage 2 462 olds
Manny tranny
( pictures at http://www.gmcmhphotos.com/photos/g6489-olga.html
Fulltiming in Europe july 2014 til july 2016
Denmark
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| Re: No alternater current [message #289116 is a reply to message #289115] |
Wed, 21 October 2015 16:19 |
appie
Messages: 902
Registered: April 2013
Location: denmark
Karma: 2
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Mister hammilton. That is a thought I will look into tomorrow!
The spare came from a caddy supposed to bee good, but without garantie
Appie
eleganza 76 "Olga" now sadly sold
6 wheel discbrake
Quadrabags
Springfield stage 2 462 olds
Manny tranny
( pictures at http://www.gmcmhphotos.com/photos/g6489-olga.html
Fulltiming in Europe july 2014 til july 2016
Denmark
[Updated on: Wed, 21 October 2015 16:20] Report message to a moderator |
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| Re: [GMCnet] No alternater current [message #289117 is a reply to message #289109] |
Wed, 21 October 2015 16:08 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Johnny,
Take another look at the wiring diagram: If the fusible link fails
(with the alternator producing voltage), the effect will be similar to
a failed isolator diode on the chassis battery side: Feedback to the
alternator will be interrupted and the alternator will go "wide open"
(hopefully internally limited to 18 VDC, but not necessarily). Not
that one will see that, since the engine will shut down because the
ignition switch receives its power from the battery through the
fusible link.
Ken H.
Americus, GA
'76 X-Birchaven w/Cad500/Howell EFI & EBL,
Manny Brakes & 1-Ton, etc., etc.
www.gmcwipersetc.com
On Wed, Oct 21, 2015 at 4:10 PM, Johnny Bridges wrote:
> Appie, I'm gonna bet your alternator either wore out the brushes (first choice) or the internal regulator failed (second choice). Go through the test
> sequence listed above and see what you get. I just put brushes and regulator in mine. The hardest part you'll have is finding the parts.
> Also, before dissing the alternator, check the fusible link which runs from the chassis 12volt point into one of the wiring harnesses. If it's open,
> no charge.
>
> --johnny
> --
> '76 23' transmode Norris upfit
> Braselton, Ga.
>
> "Sometimes I wonder what tomorrow's gonna bring when I think about my dirty life and times" --Warren Zevon
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] No alternater current [message #289118 is a reply to message #289116] |
Wed, 21 October 2015 16:28 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Lenze, if you have an operating Genset, You can jumper your isolator on the
two end posts with a 10 ga wire, start the gen set, and drive to a
destination where you can get the engine alternator repaired or replaced. I
keep such a jumper with alligator clips on the ends permanently attached to
one isolator post. Then, no drama.
Jim Hupy
Salem, OR
78 GMC Royale, 403.
On Wed, Oct 21, 2015 at 2:19 PM, lenze middelberg
wrote:
> Mister hammilton. That is a thought I will look into tomorrow!
> --
> Appie
> eleganza 76 "Olga" ( pictures at
> http://www.gmcmhphotos.com/photos/g6489-olga.html
> Fulltiming in Europe since july 1 2014
> Denmark
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
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| Re: [GMCnet] No alternater current [message #289121 is a reply to message #289114] |
Wed, 21 October 2015 16:50 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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Appie,
The fusible link is the 16 gauge black wire connecting the horn relay
to the battery junction block on the firewall. That wire and the
isolator diode (which does not allow current to flow FROM the chassis
battery) is the only connection to the chassis electrical systems
controls. So if the headlights work, or the engine cranks, or 'most
anything else works, that link is good.
Ken H.
On Wed, Oct 21, 2015 at 5:17 PM, lenze middelberg wrote:
> ...
> Still wondering about that fusable link Johnniy mentiones
> --
> Appie
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] No alternater current [message #289123 is a reply to message #289119] |
Wed, 21 October 2015 17:45 |
Bruce Hart
Messages: 1501
Registered: October 2011
Location: La Grange, Wyoming
Karma: 5
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Senior Member |
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Appie,
I recently had an alternator go out on a trip back from Missouri (800 miles
one way) we drove about 150 miles after I first noticed that my volt meter
wasn't registering a charge. Coach stalled 2 miles from home. Several of
the normal electrical functions either quit working as the voltage would
drop. No turn signals or hazard lights, water, engine oil, and
transmission temp gauges read 1/2 to 3/4 of their values. Tried to use my
generator for electrical output but must have had a bad connection.
I found on my alternator that the The metal strap from the bridge rectifier
to the connection post had melted and broke contact at the connecting post
( connecting must have been loose so a lot of heat was generated). Replace
metal strip, checked diodes, rectifier and reassembled. Alternator is
producing 14.8 volts.
For future needs I bought a 27SI alternator kit off of E-bay that had all
of the replaceable components. Kit at the time was just under $35 with
free shipping in the USA.
On Wed, Oct 21, 2015 at 3:37 PM, Bruce Hart wrote:
> Appie
> Have a look here also. Good illustrations on the disassembly of the
> alternator with write up.
>
>
>
> On Wed, Oct 21, 2015 at 3:19 PM, lenze middelberg
> wrote:
>
>> Mister hammilton. That is a thought I will look into tomorrow!
>> --
>> Appie
>> eleganza 76 "Olga" ( pictures at
>> http://www.gmcmhphotos.com/photos/g6489-olga.html
>> Fulltiming in Europe since july 1 2014
>> Denmark
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
>
>
>
> --
> Bruce Hart
> 1976 Palm Beach
> Milliken, Co
> GMC=Got More Class
>
>
--
Bruce Hart
1976 Palm Beach
Milliken, Co
GMC=Got More Class
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Bruce Hart
1976 Palm Beach
1977 28' Kingsley
La Grange, Wyoming
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| Re: [GMCnet] No alternater current [message #289143 is a reply to message #289123] |
Thu, 22 October 2015 01:08 |
appie
Messages: 902
Registered: April 2013
Location: denmark
Karma: 2
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Senior Member |
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Thanks guys, for all the input, everything points to bad alternators
I will drive the planned 20 miles this morning and then take the hem apart to see if ai can fix one of them
There is a repairset on the way, but will be a other 2 weeks before arrivel
Otherwisw I wil chase Malaga for a new one
Appie
eleganza 76 "Olga" now sadly sold
6 wheel discbrake
Quadrabags
Springfield stage 2 462 olds
Manny tranny
( pictures at http://www.gmcmhphotos.com/photos/g6489-olga.html
Fulltiming in Europe july 2014 til july 2016
Denmark
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| Re: [GMCnet] No alternater current [message #289152 is a reply to message #289146] |
Thu, 22 October 2015 08:13 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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Pete,
The fusible link is a last resort protective device; if everything else
fails in the event of a massive short, the fusible link will open. It's a
cheap fuse, easily replaced if necessary.
Ken H.
On Thu, Oct 22, 2015 at 8:02 AM, Pete Smith wrote:
> I had never heard of a fusible link until I came to live in the
> US......pretty sure the cars of my youth in Britain (minis and Triumps)
> never had
> them..........what is the point of a fusible link over a simple fuse??
> Seems weird that burning out part of your wiring loom is ever a good
> thing...........
>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: No alternater current [message #289154 is a reply to message #289099] |
Thu, 22 October 2015 08:23 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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Senior Member |
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After some research, I find >two< fusible links in my coach, one had been added to the alternator output where it comes out of the engine harness. It is now MIA.
--johnny
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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| Re: No alternater current [message #289165 is a reply to message #289154] |
Thu, 22 October 2015 10:46 |
appie
Messages: 902
Registered: April 2013
Location: denmark
Karma: 2
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Senior Member |
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Took the alternator apart and gave up on it. Ordered a new alternater to arrive here on monday
I do have a testing manual for the thing, but everything I measure seems to be wrong. There is no resistance between the sliprings and the diodes have the same resistence both ways. All 3 of them?
I cant emagien anything else to be the problem. So L"ll get a new one. Amd hope that will solve the problem
Appie
eleganza 76 "Olga" now sadly sold
6 wheel discbrake
Quadrabags
Springfield stage 2 462 olds
Manny tranny
( pictures at http://www.gmcmhphotos.com/photos/g6489-olga.html
Fulltiming in Europe july 2014 til july 2016
Denmark
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