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Unknown wires drivers side forward of heater [message #330237]

Thu, 22 March 2018 22:06

Jack Ramsey

Messages: 82
Registered: December 2012
Location: Tulare, CA

Karma: 1

Member

http://www.gmcmhphotos.com/photos/electrical/p64743-interior-unknown-drivers-side-wires.html

Replacing heater and countertop, found this tucked behind lower reinforcement along floor. Brown, brown-white stripe, and black. Has been broken a LONG time. Only has 8 volts on it when ignition on. When I put a toner in it moves forward through lower harness and behind the drivers side panel. As I type, thinking might be gas tank sender, but not enough wires. Ideas? or something under the missing seat?

Jack Ramsey Tulare, CA TZE165V101526 1975 Palm Beach

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Re: Unknown wires drivers side forward of heater [message #330238 is a reply to message #330237]

Thu, 22 March 2018 23:08

RF_Burns

Messages: 2277
Registered: June 2008
Location: S. Ontario, Canada

Karma: 3

Senior Member

I just have the 77-78 electrical diagram with me. It shows tan / double white-tan is main/aux fuel sensors and black is the fuel tank selector solenoid.

Bruce Hislop
ON Canada
77PB, 455 Dick P. rebuilt, DynamicEFI EBL EFI & ESC.
1 ton front end
http://www.gmcmhphotos.com/photos/showphoto.php?photo=29001
My Staff says I never listen to them, or something like that

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Re: Unknown wires drivers side forward of heater [message #330269 is a reply to message #330238]

Fri, 23 March 2018 20:26

Tom Lins

Messages: 372
Registered: February 2004
Location: St Augustine, FL

Karma: 1

Senior Member

RF_Burns wrote on Fri, 23 March 2018 00:08

I just have the 77-78 electrical diagram with me. It shows tan / double white-tan is main/aux fuel sensors and black is the fuel tank selector solenoid.

It is the same on the 75 with breaker points diagram and the 75 with HEI diagram and the wires go thru a 10 wire connector to the side body harness and then thru a 2 wire connector on the LH frame rail.

Tom Lins
St Augustine, FL
77 GM Rear Twin, Dry Bath, 455, Aluminum Radiator Quad-Bag Suspension Solar Panel
Manuals on DVD
YOUTUBE Channel: GMC Dealer Training Tapes
http://www.bdub.net/tomlins/

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Re: Unknown wires drivers side forward of heater [message #330425 is a reply to message #330237]

Tue, 27 March 2018 18:46

Jack Ramsey

Messages: 82
Registered: December 2012
Location: Tulare, CA

Karma: 1

Member

http://www.gmcmhphotos.com/photos/electrical/p64744-wires-hanging-under-coach.html

Thanks for the replies. It was the fuel selector and tank sensor wires. I use waterproof connectors, the right size and color wires, a heat gun to shrink the connections, and for the first time in what I am sure is many years, fuel gauge readings. Plus found new fuel lines under there, Just hope they replaced them ALL.
Also installed Bovee Onan pointless system, reasonably easy, but a little time consuming as I get my bearings. I now know why the power drawer 6k is called a BEAST. It is one.
ran poor, pulled the plugs and nice color on the front, while rich on the rear. Once I popped the plugs back in and pushed the coil wires on, purred like I think it should. I bet the coil wires could, should, be replaced. too many years sitting. dielectric grease is my newest best friend for darn near every electrical connection in this coach.

Thanks again,

Jack

Jack Ramsey Tulare, CA TZE165V101526 1975 Palm Beach

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