| [GMCnet] Found the source of all my electrical issues. ? [message #323971] |
Mon, 18 September 2017 09:03  |
BobDunahugh
Messages: 2465
Registered: October 2010
Location: Cedar Rapids, IA
Karma: 11
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Senior Member |
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Went and did my normal pre drive check. No brake lights. Found that the issue was the 39 year old brake light switch. Replaced that switch. Headed off to Elkhart. The Howell EFI worked PERFECTLY all the way. Great mileage. Got to within 45 miles of the GMCMI rally. The new brake light switch from China failed. Oh well. Got 500 miles out of it. Went to lower the right rear air bags to take a shower. T then the two compressor system quit working. Then during the night. Our furnace stopped working. I expected some of this because this GMC sat next to a cornfield in Iowa from Oct of 1995 to Oct of 2015. But now it appears that I've pissed off the electrical god EL. That has to be my problem. RIGHT? Bob Dunahugh 78 Royale Mouse House
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| Re: [GMCnet] Found the source of all my electrical issues. ? [message #323973 is a reply to message #323971] |
Mon, 18 September 2017 09:56  |
sgltrac
Messages: 2797
Registered: April 2011
Karma: 1
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The problem could be that you are driving a 40+ year old house hundreds of
miles. Maybe.
Sully
77 eleganza 2
Bellevue.
On Mon, Sep 18, 2017 at 7:04 AM Bob Dunahugh wrote:
> Went and did my normal pre drive check. No brake lights. Found that the
> issue was the 39 year old brake light switch. Replaced that switch. Headed
> off to Elkhart. The Howell EFI worked PERFECTLY all the way. Great mileage.
> Got to within 45 miles of the GMCMI rally. The new brake light switch from
> China failed. Oh well. Got 500 miles out of it. Went to lower the right
> rear air bags to take a shower. T then the two compressor system quit
> working. Then during the night. Our furnace stopped working. I expected
> some of this because this GMC sat next to a cornfield in Iowa from Oct of
> 1995 to Oct of 2015. But now it appears that I've pissed off the
> electrical god EL. That has to be my problem. RIGHT? Bob Dunahugh 78
> Royale Mouse House
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
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Sully
77 Royale basket case.
Future motorhome land speed record holder(bucket list)
Seattle, Wa.
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| Re: [GMCnet] Gas mileage improvement [message #324018 is a reply to message #323976] |
Tue, 19 September 2017 08:19 |
Justin Brady
Messages: 769
Registered: April 2015
Location: Bell Buckle, TN
Karma: 11
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Senior Member |
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I'm with Rick.
I have never seen anyone have so many electrical problems. It seems every component you put on fails almost immediately.
I'd look really closely at the alternator and your grounding situation before you fry that expensive ECU.
Either you REALLY did something to piss off the gods or you're frying parts!
Justin Brady
http://www.thegmcrv.com/
1976 Palm Beach 455
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| Re: [GMCnet] Found the source of all my electrical issues. ? [message #324040 is a reply to message #323971] |
Tue, 19 September 2017 18:51 |
Bullitthead
Messages: 1411
Registered: November 2013
Karma: 5
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Senior Member |
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Check the load on the brake light circuit. Trailer wiring will add load when the trailer is there, and extra sources of problems all of the time. Best to use relays for long distance trailering, but of course that adds complexity, and future failure points if not done correctly.
Put your ohmmeter on the cold side of the brake switch and see how little resistance to ground there is on that circuit.
Terry Kelpien
ASE Master Technician
73 Glacier 260
Smithfield, Va.
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| [GMCnet] YES I've had some issues. But these GMC's are still inexpencive as compaired to some SOB's [message #324283 is a reply to message #323971] |
Sat, 23 September 2017 21:21 |
BobDunahugh
Messages: 2465
Registered: October 2010
Location: Cedar Rapids, IA
Karma: 11
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Senior Member |
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Some comments covered voltage issues with my fuel pumps., and driving a 40 year old GMC. ( Still not home. ) Checked voltage parked with engine running, and with my Digi panel on the road. As to all the fuel pumps that failed. They all ran. Just stopped pumping gas. As to 40 years. I expected, and had issues with electrical components after the setting next to the cornfield for 20 years. The real frustration has been with LIFETIME parts that kept failing. Now the furnace doesn't work. That's fine. As I was surprised that it worked at all in the first place. Haven't replaced the gas water heater. YET. So maybe I should call Jim K at Applied to get both from him. I'm to the point that I'm coming up on having $40,000 in this 78 Royale with no labor cost included. I will have a GMC with all new parts in it. Now $40,000 could get me into a USED SOB ( some other brand ) Then I would be able to dump more cash into that thing. So in reality. I have a new GMC for $40,000. That is built JUST for our NEEDS. And it IS a HOBBY. RIGHT?
Bob Dunahugh
________________________________
From: Bob Dunahugh
Sent: Monday, September 18, 2017 9:03 AM
To: gmclist@list.gmcnet.org
Subject: Found the source of all my electrical issues. ?
Went and did my normal pre drive check. No brake lights. Found that the issue was the 39 year old brake light switch. Replaced that switch. Headed off to Elkhart. The Howell EFI worked PERFECTLY all the way. Great mileage. Got to within 45 miles of the GMCMI rally. The new brake light switch from China failed. Oh well. Got 500 miles out of it. Went to lower the right rear air bags to take a shower. T then the two compressor system quit working. Then during the night. Our furnace stopped working. I expected some of this because this GMC sat next to a cornfield in Iowa from Oct of 1995 to Oct of 2015. But now it appears that I've pissed off the electrical god EL. That has to be my problem. RIGHT? Bob Dunahugh 78 Royale Mouse House
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