Home » Public Forums » GMCnet » House/Shore power issue.....Easy fix??
| House/Shore power issue.....Easy fix?? [message #184591] |
Sat, 15 September 2012 12:29  |
pdxrover15
Messages: 19
Registered: September 2012
Karma: 0
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Junior Member |
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To All,
I recently acquired a '77 Coca-Cola and have been going through all of the coach systems. I came across and issue with the house power and was hoping that one of you more experienced members have seen this issue before and be able to help. Here goes...
Coach is running: All house lights, heather fan, stove vent fan, cockpit lights, monitoring system, etc. all come on.
Shore power connected: Only A/C units work.
Coach off/No Shore power: Dash radio works.
Generator: I have not started Onan yet.
My hope is that I'm overlooking something simple. Anyone have any ideas on how to get all systems running from shore power?
Chad
'77 Coca-Cola
Portland, Or
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| Re: [GMCnet] House/Shore power issue.....Easy fix?? [message #184595 is a reply to message #184591] |
Sat, 15 September 2012 13:00  |
David Greenberg
Messages: 222
Registered: September 2010
Karma: 0
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Senior Member |
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Have you checked then circuit breakers?
Also different topic, but ha be you updated the GMC REGISTRY?
On Sep 15, 2012 1:29 PM, "Chad" <osulax15@hotmail.com> wrote:
>
>
> To All,
>
> I recently acquired a '77 Coca-Cola and have been going through all of the
> coach systems. I came across and issue with the house power and was hoping
> that one of you more experienced members have seen this issue before and be
> able to help. Here goes...
>
> Coach is running: All house lights, heather fan, stove vent fan, cockpit
> lights, monitoring system, etc. all come on.
>
> Shore power connected: Only A/C units work.
>
> Coach off/No Shore power: Dash radio works.
>
> Generator: I have not started Onan yet.
>
> My hope is that I'm overlooking something simple. Anyone have any ideas on
> how to get all systems running from shore power?
> --
> Chad
>
> '77 Coca-Cola
>
> Portland, Or
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
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| Re: House/Shore power issue.....Easy fix?? [message #184596 is a reply to message #184593] |
Sat, 15 September 2012 13:09 |
roy1
Messages: 2126
Registered: July 2004
Location: Minden nevada
Karma: 6
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Senior Member |
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| wally wrote on Sat, 15 September 2012 11:01 |
| pdxrover15 wrote on Sat, 15 September 2012 12:29 |
To All,
I recently acquired a '77 Coca-Cola and have been going through all of the coach systems. I came across and issue with the house power and was hoping that one of you more experienced members have seen this issue before and be able to help. Here goes...
Coach is running: All house lights, heather fan, stove vent fan, cockpit lights, monitoring system, etc. all come on.
Shore power connected: Only A/C units work.
Coach off/No Shore power: Dash radio works.
Generator: I have not started Onan yet.
My hope is that I'm overlooking something simple. Anyone have any ideas on how to get all systems running from shore power?
|
Sounds like your house battery is dead, missing or disconnected. There should be one 12v or two 6 volt batteries in the generator compartment. The DC house side will get power from the engines alternator when running.
As for no house DC on shore power check to see if the converter is plugged in and it's breaker on. Converter is in the electrical compartment inside by the breaker panel.
HTH
|
I would agree with Wally but if the A/C units work don't the plugs have power? If not I would start trouble shooting there.
Roy Keen
Minden,NV
76 X Glenbrook
[Updated on: Sat, 15 September 2012 13:11] Report message to a moderator |
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| Re: House/Shore power issue.....Easy fix?? [message #184601 is a reply to message #184597] |
Sat, 15 September 2012 15:19 |
pdxrover15
Messages: 19
Registered: September 2012
Karma: 0
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Junior Member |
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| Harry wrote on Sat, 15 September 2012 11:30 |
Could he mean that only AC 110volt units work?
Not A/C as in Air Conditioning?
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Only the roof 110v units work on shore power. Nothing else comes on.
Chad
'77 Coca-Cola
Portland, Or
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| Re: House/Shore power issue.....Easy fix?? [message #184603 is a reply to message #184593] |
Sat, 15 September 2012 15:24 |
pdxrover15
Messages: 19
Registered: September 2012
Karma: 0
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Junior Member |
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| wally wrote on Sat, 15 September 2012 11:01 |
| pdxrover15 wrote on Sat, 15 September 2012 12:29 |
To All,
I recently acquired a '77 Coca-Cola and have been going through all of the coach systems. I came across and issue with the house power and was hoping that one of you more experienced members have seen this issue before and be able to help. Here goes...
Coach is running: All house lights, heather fan, stove vent fan, cockpit lights, monitoring system, etc. all come on.
Shore power connected: Only A/C units work.
Coach off/No Shore power: Dash radio works.
Generator: I have not started Onan yet.
My hope is that I'm overlooking something simple. Anyone have any ideas on how to get all systems running from shore power?
|
Sounds like your house battery is dead, missing or disconnected. There should be one 12v or two 6 volt batteries in the generator compartment. The DC house side will get power from the engines alternator when running.
As for no house DC on shore power check to see if the converter is plugged in and it's breaker on. Converter is in the electrical compartment inside by the breaker panel.
HTH
|
I've got 2 house batteries installed. They will most likely need to be replaced, as I assume they have been sitting for some time. I would have thought plugging into shore power would supply power to entire interior of the coach regardless of the state of house batteries. Am I mistaken?
Converter is plugged, breakers on, and fuses look good.
Chad
'77 Coca-Cola
Portland, Or
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| Re: House/Shore power issue.....Easy fix?? [message #184606 is a reply to message #184591] |
Sat, 15 September 2012 15:35 |
JohnL455
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
Karma: 12
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Senior Member |
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If the batteries are failed in shorted mode they may have wiped out the 120 to 14V converter. It could be the original buzzzzzzz box if so buy a 30- 50 A smart converter such as IOTA
John Lebetski
Woodstock, IL
77 Eleganza II
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| Re: House/Shore power issue.....Easy fix?? [message #184607 is a reply to message #184591] |
Sat, 15 September 2012 15:50 |
GeorgeRud
Messages: 1380
Registered: February 2007
Location: Chicago, IL
Karma: 0
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Senior Member |
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I would try to check if you have 12-14volts at the house fuse holder with the coach plugged in. If not, try with the engine running. That would tell you if the converter (buzz box) is working. If it original, replace it as John suggests as you will kill the house batteries if you leave the coach plugged in when it's parked. I learned the hard way and boiled out my original house batteries before I switched to a new charger. The original buzz box just keeps charging while plugged in.
George Rudawsky
Chicago, IL
75 Palm Beach
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| Re: House/Shore power issue.....Easy fix?? [message #184608 is a reply to message #184607] |
Sat, 15 September 2012 15:58 |
tphipps
Messages: 3005
Registered: August 2004
Location: Spanish Fort, AL
Karma: 9
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Senior Member |
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Do not dispose of original buzz box. It makes an excellent bench power supply for testing 12v powered things. Just get it out of coach, as others suggest. It is inferior to current power converters from several sources. Modern ones will step down output as the battery reaches fully charged, then keep a maintainence level so the battery is fully charged.
Known good brands are; Iota, Progressive, Xantex. You only need the 45 amp model to keep the house battery up to snuff. Look on Iota and Progressive web site for deals in re-furnished models.
Tom, MS II
2012 Phoenix Cruiser model 2552
KA4CSG
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| Re: House/Shore power issue.....Easy fix?? [message #184616 is a reply to message #184601] |
Sat, 15 September 2012 16:53 |
roy1
Messages: 2126
Registered: July 2004
Location: Minden nevada
Karma: 6
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Senior Member |
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| pdxrover15 wrote on Sat, 15 September 2012 13:19 |
| Harry wrote on Sat, 15 September 2012 11:30 |
Could he mean that only AC 110volt units work?
Not A/C as in Air Conditioning?
|
Only the roof 110v units work on shore power. Nothing else comes on.
|
The question was did you try to plug anything into the 120 volt plugs like a toaster,drop light etc. sure the roof air comes on but everything else 120 volt needs to be plugged in.
Roy Keen
Minden,NV
76 X Glenbrook
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| Re: House/Shore power issue.....Easy fix?? [message #184705 is a reply to message #184616] |
Sun, 16 September 2012 10:37 |
pdxrover15
Messages: 19
Registered: September 2012
Karma: 0
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Junior Member |
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| roy1 wrote on Sat, 15 September 2012 14:53 |
| pdxrover15 wrote on Sat, 15 September 2012 13:19 |
| Harry wrote on Sat, 15 September 2012 11:30 |
Could he mean that only AC 110volt units work?
Not A/C as in Air Conditioning?
|
Only the roof 110v units work on shore power. Nothing else comes on.
|
The question was did you try to plug anything into the 120 volt plugs like a toaster,drop light etc. sure the roof air comes on but everything else 120 volt needs to be plugged in.
|
After spending yesterday working on the coach I've made some progress on the electrical issues. All of the 120 outlets work while plugged into shore power. That leaves the lights, vent fans, system monitor, etc still not getting power unless engine is running.
I am going to replace the house batteries this week and look into a new converter. Thank you all for you assistance.
Chad
'77 Coca-Cola
Portland, Or
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| Re: House/Shore power issue.....Easy fix?? [message #184712 is a reply to message #184603] |
Sun, 16 September 2012 11:08 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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Senior Member |
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| pdxrover15 wrote on Sat, 15 September 2012 15:24 |
| wally wrote on Sat, 15 September 2012 11:01 |
| pdxrover15 wrote on Sat, 15 September 2012 12:29 |
To All,
I recently acquired a '77 Coca-Cola and have been going through all of the coach systems. I came across and issue with the house power and was hoping that one of you more experienced members have seen this issue before and be able to help. Here goes...
Coach is running: All house lights, heather fan, stove vent fan, cockpit lights, monitoring system, etc. all come on.
Shore power connected: Only A/C units work.
Coach off/No Shore power: Dash radio works.
Generator: I have not started Onan yet.
My hope is that I'm overlooking something simple. Anyone have any ideas on how to get all systems running from shore power?
|
Sounds like your house battery is dead, missing or disconnected. There should be one 12v or two 6 volt batteries in the generator compartment. The DC house side will get power from the engines alternator when running.
As for no house DC on shore power check to see if the converter is plugged in and it's breaker on. Converter is in the electrical compartment inside by the breaker panel.
HTH
|
I've got 2 house batteries installed. They will most likely need to be replaced, as I assume they have been sitting for some time. I would have thought plugging into shore power would supply power to entire interior of the coach regardless of the state of house batteries. Am I mistaken?
Converter is plugged, breakers on, and fuses look good.
|
You are correct. Get out your meter. Do you 120 volts AC going to the converter? Do you have 12 volts DC coming out of the converter?
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: House/Shore power issue.....Easy fix?? [message #184715 is a reply to message #184705] |
Sun, 16 September 2012 11:30 |
C Boyd
Messages: 2629
Registered: April 2006
Karma: 18
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Senior Member |
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Sir: The lights, vent fans, system moniter, etc are 12 volts and run off the the house battery. They work when the motor is running cause it also charges the house battery. The converter should be plugged in to to 120 volt and put out ~12 volts to run the accesories and to charge the house battery when plugged in. As Ken B said, check for 120v into and 12 out.
| pdxrover15 wrote on Sun, 16 September 2012 11:37 |
| roy1 wrote on Sat, 15 September 2012 14:53 |
| pdxrover15 wrote on Sat, 15 September 2012 13:19 |
| Harry wrote on Sat, 15 September 2012 11:30 |
Could he mean that only AC 110volt units work?
Not A/C as in Air Conditioning?
|
Only the roof 110v units work on shore power. Nothing else comes on.
|
The question was did you try to plug anything into the 120 volt plugs like a toaster,drop light etc. sure the roof air comes on but everything else 120 volt needs to be plugged in.
|
After spending yesterday working on the coach I've made some progress on the electrical issues. All of the 120 outlets work while plugged into shore power. That leaves the lights, vent fans, system monitor, etc still not getting power unless engine is running.
I am going to replace the house batteries this week and look into a new converter. Thank you all for you assistance.
|
C. Boyd
76 Crestmont
East Tennessee
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| Re: [GMCnet] House/Shore power issue.....Easy fix?? [message #184723 is a reply to message #184716] |
Sun, 16 September 2012 11:45 |
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ljdavick
Messages: 3548
Registered: March 2007
Location: Fremont, CA
Karma: -3
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Senior Member |
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One small thing that might be a long term help - Tom Hampton installed a battery disconnect switch at the battery compartment next to the Onan. I throw the switch any time I park the coach for more than a day. This removes any chance of parasitic draw bringing the batteries down too low while sitting and, I believe, extends their life.
Does not apply to those with solar panels.
Larry Davick
On Sep 16, 2012, at 9:30 AM, Dan Gregg <gregg_dan@hotmail.com> wrote:
> You, and the folks here, have narrowed it down to the converter. I suspect dead batteries also. You will have all dc power working when you replace the house batteries for a period of time then they will die. Make sure you get the converter working, or keep a battery charger on the new house batteries. Placing a good battery charger on the old house batteries might give you dc power now.
> Dan
> --
> Dan & Teri Gregg
>
> http://danandteri.blogspot.com/
> _______________________________________________
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Larry Davick
A Mystery Machine
1976(ish) Palm Beach
Fremont, Ca
Howell EFI + EBL + Electronic Dizzy
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| Re: [GMCnet] House/Shore power issue.....Easy fix?? [message #184728 is a reply to message #184723] |
Sun, 16 September 2012 12:09 |
Mr ERFisher
Messages: 7117
Registered: August 2005
Karma: 2
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Senior Member |
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combiner will do this automatically
gene
On Sun, Sep 16, 2012 at 9:45 AM, Larry Davick <ljdavick@comcast.net> wrote:
> One small thing that might be a long term help - Tom Hampton installed a
> battery disconnect switch at the battery compartment next to the Onan. I
> throw the switch any time I park the coach for more than a day. This
> removes any chance of parasitic draw bringing the batteries down too low
> while sitting and, I believe, extends their life.
>
> Does not apply to those with solar panels.
>
> Larry Davick
>
> On Sep 16, 2012, at 9:30 AM, Dan Gregg <gregg_dan@hotmail.com> wrote:
>
> > You, and the folks here, have narrowed it down to the converter. I
> suspect dead batteries also. You will have all dc power working when you
> replace the house batteries for a period of time then they will die. Make
> sure you get the converter working, or keep a battery charger on the new
> house batteries. Placing a good battery charger on the old house batteries
> might give you dc power now.
> > Dan
> > --
> > Dan & Teri Gregg
> >
> > http://danandteri.blogspot.com/
> > _______________________________________________
> _______________________________________________
> 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] House/Shore power issue.....Easy fix?? [message #184735 is a reply to message #184728] |
Sun, 16 September 2012 13:09 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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Senior Member |
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That is a new one on me. How does it do that?
| Mr ERFisher wrote on Sun, 16 September 2012 12:09 |
combiner will do this automatically
gene
On Sun, Sep 16, 2012 at 9:45 AM, Larry Davick <ljdavick@comcast.net> wrote:
> One small thing that might be a long term help - Tom Hampton installed a
> battery disconnect switch at the battery compartment next to the Onan. I
> throw the switch any time I park the coach for more than a day. This
> removes any chance of parasitic draw bringing the batteries down too low
> while sitting and, I believe, extends their life.
>
> Does not apply to those with solar panels.
>
> Larry Davick
>
> On Sep 16, 2012, at 9:30 AM, Dan Gregg <gregg_dan@hotmail.com> wrote:
>
> > You, and the folks here, have narrowed it down to the converter. I
> suspect dead batteries also. You will have all dc power working when you
> replace the house batteries for a period of time then they will die. Make
> sure you get the converter working, or keep a battery charger on the new
> house batteries. Placing a good battery charger on the old house batteries
> might give you dc power now.
> > Dan
> > --
> > Dan & Teri Gregg
> >
> > http://danandteri.blogspot.com/
> > _______________________________________________
> _______________________________________________
> 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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Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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