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Author Topic: Fuel Guage  (Read 4689 times)

Offline SILSquarebody

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Fuel Guage
« on: August 04, 2024, 08:11:32 pm »
I bought an 86 K5. I am slowly working thru all the problems with it. The gas guage show it is way over full when you start it. Can someone tell me what color the wires are for the fuel guage please? Ground problem? Or what you think?
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Offline bd

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Re: Fuel Guage
« Reply #1 on: August 05, 2024, 10:56:05 am »
1986 Factory Wiring Manual

Functional Tests of Factory GM Electric Gauges

Does the fuel gauge needle point at ~3:00 o'clock position and remain there continuously with the ignition switched ON or does the needle drop normally while driving?

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Rich
It's difficult to know just how much you don't know until you know it.
In other words... if people learn by making mistakes, by now I should know just about everything!!!
87 R10 Silverado Fleetside 355 MPFI 700R4 3.42 Locker (aka Rusty, aka Mater)

Offline SILSquarebody

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Re: Fuel Guage
« Reply #2 on: August 05, 2024, 04:57:53 pm »
Yes it does stay at 3 o clock.
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Offline bd

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Re: Fuel Guage
« Reply #3 on: August 05, 2024, 05:07:40 pm »
There's an open in the signal circuit from the sender, or the sender rheostat in the fuel tank is open, or the sender isn't properly grounded.  For wire colors and routing, refer to the linked factory wiring manual.
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Rich
It's difficult to know just how much you don't know until you know it.
In other words... if people learn by making mistakes, by now I should know just about everything!!!
87 R10 Silverado Fleetside 355 MPFI 700R4 3.42 Locker (aka Rusty, aka Mater)

Offline SILSquarebody

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Re: Fuel Guage
« Reply #4 on: August 05, 2024, 06:51:12 pm »
Where do I find the wiring manual?
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Offline SILSquarebody

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Re: Fuel Guage
« Reply #5 on: August 05, 2024, 06:55:48 pm »
NVM I found it. Thanks.
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