Wire mess
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Junior User
Joined: Dec 2007
Posts: 86
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From: Solon
Wire mess
My truck is a 79 4x4 with a 460. with an auto. tranny, originally a 400 with a manual tranny.
My fuel gauge hasn't worked sence I bought the truck so I checked everything suggested and everything has been checking out. I got under the truck again and started tracing wires thinking maybe I missed something. I found a cut wire going to the front tank so I fixed that. that wasn't it them I reached all around the front tank and found anouther wire that wasn't even attached to any thing. I traced it all the way to engine compartment and it isn't attached to anything there either. Then as I looked longer in the engine area I notice wire connecters that weren't going to any thing. I'm really confused. Everything else is great just no gas gauge. Where can I get a wiring diagram so maybe I can at least figure out where to start with this. Thanks
Paul
My fuel gauge hasn't worked sence I bought the truck so I checked everything suggested and everything has been checking out. I got under the truck again and started tracing wires thinking maybe I missed something. I found a cut wire going to the front tank so I fixed that. that wasn't it them I reached all around the front tank and found anouther wire that wasn't even attached to any thing. I traced it all the way to engine compartment and it isn't attached to anything there either. Then as I looked longer in the engine area I notice wire connecters that weren't going to any thing. I'm really confused. Everything else is great just no gas gauge. Where can I get a wiring diagram so maybe I can at least figure out where to start with this. Thanks
Paul
New User
Joined: Jan 2008
Posts: 0
Likes: 24
We need Pictures and the colour coding of the wires.
There are many unused wires on these truck that aren't full of options
Rather than having 12 different complete wiring harnesses they use a Main harness with Plug & Play option harnesses
Pretty smart ....IMO
I have tons of photos that are labeled with parts and connections
There are many unused wires on these truck that aren't full of options
Rather than having 12 different complete wiring harnesses they use a Main harness with Plug & Play option harnesses
Pretty smart ....IMO
I have tons of photos that are labeled with parts and connections
Senior User
Joined: Jun 2006
Posts: 292
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From: Phoenix, AZ
Check your gauge by grounding the sender wire at the tank (momentarilly) doing this should peg it to "full". Also check the selector switch if you have 2 tanks. In my experience the sender is at fault most of the time. It wouldn't hurt to check/clean connections at the back of the instrument cluster.
Posting Guru
Joined: Sep 2003
Posts: 2,313
Likes: 12
From: Northeast LA
My truck had the problem of gas gauge not working and it was the brass float inside the gas tank had a hole in it, it was full of gas and wouldn't float anymore. Just check that after you ground the wire running to the gauge to make sure it pegs the gauge and the shows the gauge and wiring is good.
Thread Starter
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Junior User
Joined: Dec 2007
Posts: 86
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From: Solon
Here are some pics
This is the wire that was on top of my front tank not hooked to anything.
the wire wrapped in my finger below is the one that is laying on my gas tank not attached to any thing I'm guessing the other connectors in the photo are for the options my truck doesnt have.
The green wire is the wire that was cut to the front gas tank. I repaired and heat shrinked. What is that wire because the black wire below it is the one hooked to ground?
This is the wire that was on top of my front tank not hooked to anything.
the wire wrapped in my finger below is the one that is laying on my gas tank not attached to any thing I'm guessing the other connectors in the photo are for the options my truck doesnt have.
The green wire is the wire that was cut to the front gas tank. I repaired and heat shrinked. What is that wire because the black wire below it is the one hooked to ground?
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Senior User
Joined: Mar 2005
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From: Lake Havasu, AZ
When I took my truck down to the frame last weekend I found the same wire as in your first pic and mine was not pluged into anything either.
I will try to trace in to see where it goes into the harness.
I will try to trace in to see where it goes into the harness.
