Jim Burray
Newbie
hello and thanks for accepting my new profile to your GMC forums. I have a 1999 GMC sierra 1500 extended cab 4.8 engine and i have been maintaining / updating parts since of the last two weeks. im trying to fix all the small issues that i couldn't fix during the winter. My fuel pump wiring colors are : grey, black, orange with black line and purple
Right now im trying to do a simple quick fix to an old problem that i have. My gas gauge recently gave up and now its reading zero/empty even though the tank is full. instead of going the stepper motor route i decided on getting an aftermarket gauge as a temporary fix.
My main question would be: how would you go about in wiring this aftermarket gas gauge up? i already hooked everything the way it should; black wire to battery ground/ red is a 12v ignition key source which i found a yellow wire (probably power seats) tucked under the door's plastic floor panel.
I jumped the purple wire and connected it to my signal terminal on the gas gauge but it doesnt do anything. when i touch the signal terminal with test light with ground attached to it; the level then move all the way to the full mark (almost full). I only used the purple wire coming from the fuel pump; do i need to connect any other wire from the pump to the new gauge?
I bought the 240ohms (full) to 33ohms (empty) gauge from amazon - link below
i feel stupid asking this but i honestly dont have a clue; maybe i had to connect the ground from the pump onto the ground on the gas gauge? Im not sure
Right now im trying to do a simple quick fix to an old problem that i have. My gas gauge recently gave up and now its reading zero/empty even though the tank is full. instead of going the stepper motor route i decided on getting an aftermarket gauge as a temporary fix.
My main question would be: how would you go about in wiring this aftermarket gas gauge up? i already hooked everything the way it should; black wire to battery ground/ red is a 12v ignition key source which i found a yellow wire (probably power seats) tucked under the door's plastic floor panel.
I jumped the purple wire and connected it to my signal terminal on the gas gauge but it doesnt do anything. when i touch the signal terminal with test light with ground attached to it; the level then move all the way to the full mark (almost full). I only used the purple wire coming from the fuel pump; do i need to connect any other wire from the pump to the new gauge?
I bought the 240ohms (full) to 33ohms (empty) gauge from amazon - link below
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i feel stupid asking this but i honestly dont have a clue; maybe i had to connect the ground from the pump onto the ground on the gas gauge? Im not sure