| Electrolevel ll help needed [message #170245] |
Sat, 19 May 2012 22:44  |
herm.beeck
Messages: 9
Registered: October 2008
Location: tucson
Karma: 0
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I have discovered that a solid green #16 wire that runs from the control switch, (travel/auto/hold) to the left and right wheel sensors has melted the insulation on its full lenght of 10+ feet.
I need some help trying to figure out how it became so overloaded that it melted the insulation?.
What does this wire do in the circuit?
The unit still worked and no fuses where blown.
herm
'78 Eleganza ll
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| Re: Electrolevel ll help needed [message #170269 is a reply to message #170245] |
Sun, 20 May 2012 07:58  |
Rick Williams
Messages: 256
Registered: July 2004
Karma: 0
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Senior Member |
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Herm
You are correct in that it feeds both the left and right wheel sensors. It feeds 12v to them when in the travel mode and it is connected to ground when in the hold mode. There are two possibilities. The green wire somehow shorted to ground somewhere along it's length or one of the wheel sensors has failed causing a short or near short to ground. The green wire reaches a junction where it splits and becomes gray to the left sensor and remains green to the right sensor. Is it melted up to or beyond that junction point? The wiring diagram states that the junction is an 8 way connector located in the left wheel house area.
Rick
Rick Williams
Bliss, Michigan
1978 Eleganza II
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| Re: Electrolevel ll help needed [message #170347 is a reply to message #170296] |
Sun, 20 May 2012 21:19 |
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mike miller
Messages: 3576
Registered: February 2004
Location: Hillsboro, Oregon
Karma: 0
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| herm.beeck wrote on Sun, 20 May 2012 10:14 |
...
The green wire insulation melted from the control switch up to the junction connector. I traced it to where it splits to gray for one side. It looks OK beyond the connector on the hight sensor sides.
This must have been a problem to the PO. The PO taped some sections of the green wire where he could get to it. The black electrical tape he used fried also. The reason for mentioning this is that the system still worked with the green wire heating condition.
I discovered this while in the process of replacing the interior side panels.
Yesterday, I got to removing the plastic driver side panel to expose the control switch wiring. So far it shows that the green wire heated up to the travel-hold switch. The two diodes are crimp connected to yellow leads, not soldered.
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Herm,
With the wire fried from the switch to a connector, then OK on the other side of the connector to the point it powers something... it sounds to me like someone had the connector apart and shorted THAT wire to ground.
I'd replace the one fried wire and see how it works... before reinstalling the interior panels. As you do have the panels off, and you did say the system works with the fried wire. You also might consider providing a "stiff" power source to the pump power relays. Fuse (or CB protected) as straight off the battery as possible. Shouldn't be that hard in a GM upfitted coach as there is a junction block powered by the house batteries on the wall behind the cabinet very near the stove.
_IF_ you had just gotten done with your interior, I would really consider the wireless air system.
-- Shocking that _I_ would say that isn't it! -- 
My reasoning is that normally replacing fried wiring behind an installed interior is not worth the "benefits" of the stock system. The wireless system gives you other "benefits" and is much easier to install... over re-wiring.
But for you, try and fix the OEM first while it is easy to do it correctly. (Should be cheaper also...)
Mike Miller -- Hillsboro, OR -- on the Black list
(#2)`78 23' Birchaven Rear Bath -- (#3)`77 23' Birchaven Side Bath
More Sidekicks than GMC's and a late model Malibu called 'Boo'
http://m000035.blogspot.com
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| Re: Electrolevel ll help needed [message #170374 is a reply to message #170245] |
Mon, 21 May 2012 04:33 |
Rick Williams
Messages: 256
Registered: July 2004
Karma: 0
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Herm
The green wire feeds 12 volts to the wheel well height sensors when in the travel mode and ground to them in hold mode. As Mike stated, if the green wire is not melted past the junction point, then the wire must have been shorted to ground at the junction. You will probably not solve the mystery as to why. Replace the wire and see what happens. Just make sure that everything is well insulated.
Rick
Rick Williams
Bliss, Michigan
1978 Eleganza II
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| Re: Electrolevel ll help needed [message #170414 is a reply to message #170245] |
Mon, 21 May 2012 11:56 |
Galen
Messages: 146
Registered: November 2011
Location: New Virginia, IA
Karma: 0
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Senior Member |
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I think Gene might be referring to adding a self resetting circuit breaker on the low current control side...maybe he can confirm...that way if you have some type of recurring issue you don't find (water on a junction or faulted insulation somewhere else) it won't be potentially catastrophic until you could locate it.
Your added 30A breakers are to the compressor motor feeds? That would be different circuit, or not? Posting with no schematic handy... so forgive me if I'm wrong.
Galen Briggs
New Virginia, Iowa
1978 Palm Beach
[Updated on: Mon, 21 May 2012 11:58] Report message to a moderator |
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| Re: [GMCnet] Electrolevel ll help needed [message #170710 is a reply to message #170517] |
Thu, 24 May 2012 08:08 |
Steven Ferguson
Messages: 3447
Registered: May 2006
Karma: 0
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Good to hear that Herm. I hope you get the coach finished in time for the
upcoming rally season with the SJS.
On Tue, May 22, 2012 at 8:06 AM, herm.beeck <hbeeck@yahoo.com> wrote:
>
>
> Steve
> Doing better now and getting back to work on the GMC.
> Had to strip the interior due to the rat occupation while it was just
> sitting for all these years.
> Yes, we should see each other more often, good neighbor.
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
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--
Fathom the hypocrisy of a nation where every citizen must prove they have
health insurance......but not everyone has to prove they're a citizen.
Steve Ferguson
Sierra Vista, AZ
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