| [GMCnet] No start battery [message #151472] |
Sat, 03 December 2011 18:36  |
Dolph Santorine
Messages: 1236
Registered: April 2011
Location: Wheeling, WV
Karma: -41
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Senior Member |
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I took out the start battery, but the horn (and the running electrics) all work.
I disconnected the house battery from the combiner, and I still have the same problem.
Suggestions on where to look for something the PO did that crosses the two?
Thanks.
Dolph
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| Re: [GMCnet] No start battery [message #151475 is a reply to message #151472] |
Sat, 03 December 2011 18:58  |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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1. The boost relay may be stuck, turned on, or bypassed.
2. If you still have the isolator, it can be shorted -- though not likely.
3. 'Most anywhere.
Ken H.
On Sat, Dec 3, 2011 at 7:36 PM, Dolph Santorine wrote:
> I took out the start battery, but the horn (and the running electrics) all
> work.
>
> I disconnected the house battery from the combiner, and I still have the
> same problem.
>
> Suggestions on where to look for something the PO did that crosses the two?
>
>
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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 start battery [message #151478 is a reply to message #151475] |
Sat, 03 December 2011 19:02 |
Dolph Santorine
Messages: 1236
Registered: April 2011
Location: Wheeling, WV
Karma: -41
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Senior Member |
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You know I was afraid of the last one.... in search of splices in the morning (drat).
Dolph
On Dec 3, 2011, at 7:58 PM, Ken Henderson wrote:
> 1. The boost relay may be stuck, turned on, or bypassed.
>
> 2. If you still have the isolator, it can be shorted -- though not likely.
>
> 3. 'Most anywhere.
>
> Ken H.
>
>
>
> On Sat, Dec 3, 2011 at 7:36 PM, Dolph Santorine wrote:
>
>> I took out the start battery, but the horn (and the running electrics) all
>> work.
>>
>> I disconnected the house battery from the combiner, and I still have the
>> same problem.
>>
>> Suggestions on where to look for something the PO did that crosses the two?
>>
>>
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> GMCnet mailing list
> Unsubscribe or Change List Options:
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| Re: [GMCnet] No start battery [message #151485 is a reply to message #151472] |
Sat, 03 December 2011 20:31 |
 |
Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
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| Dolph Santorine wrote on Sat, 03 December 2011 19:36 |
I took out the start battery, but the horn (and the running electrics) all work.
I disconnected the house battery from the combiner, and I still have the same problem.
Suggestions on where to look for something the PO did that crosses the two?
Thanks.
Dolph
|
Dolph,
I do not remember what version/vintage your coach is. That might help - then again, maybe not. . .
Are you saying that things work with Both Batteries Disconnected? Hummm....
You have a combiner and are you on shore power?
The converter will set the combiner to connect both systems and the then the converter will power both, but not enough to crank.
And yes, Isolators Can Go Solid (rare, but it happens).
Good Luck Guy
Matt
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
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| Re: [GMCnet] No start battery [message #151496 is a reply to message #151472] |
Sat, 03 December 2011 22:19 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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Senior Member |
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You did not state if the house things also work like the overhead lights, furnace, etc. If they do ,then try to start it. What happened?
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: [GMCnet] No start battery [message #151499 is a reply to message #151496] |
Sat, 03 December 2011 22:30 |
Dolph Santorine
Messages: 1236
Registered: April 2011
Location: Wheeling, WV
Karma: -41
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Senior Member |
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The house lights work fine. There is not enough current coming over to do more than trip the solenoid, which it does admirably.
I'm going to remove the isolator tomorrow morning and see where that takes me (I have a spare, and a combiner... but I'm not messing with the system until it looks like it's working correctly, and I don't believe it is doing what it should.
I started looking at the drawings and it appears that if it's not the isolator or a bad boost relay (I don't think the latter, although my Ohmmeter will tell), I should be able to start pulling fuses and at least isolating which circuit is to blame.
Dolph Santorine
DE N8JPC
Wheeling, West Virginia
dolph@dolphsantorine.com
1977 GMC 26' Palm Beach
TZE167V100820
1976 GMC 26' Donor Coach
TZE166V101610
On Dec 3, 2011, at 11:19 PM, Ken Burton wrote:
>
>
> You did not state if the house things also work like the overhead lights, furnace, etc. If they do ,then try to start it. What happened?
>
>
> --
> Ken Burton - N9KB
> 76 Palm Beach
> Hebron, Indiana
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