July 23, 2019, 08:52 PM
fast frank68 camaro stock fuel gauge pegged past full
gauge sitting at about 3 oclock, checked and cleaned ground wire at tank where it attaches to body, what next?
July 23, 2019, 11:15 PM
EmanGM gauge works by tank unit controlling resistance to ground 0 to 100 ohms. You need to access the wire to the tank unit. With the key on you should have power on it and if you ground it gauge should go to empty.
July 24, 2019, 10:09 AM
23talteredShouldn't the gauge go to full if you ground it?
July 24, 2019, 12:20 PM
EmanShould go to empty if you ground the wire from the gauge, goes past full if open.
July 26, 2019, 07:12 AM
fast frankquote:
Originally posted by Eman:
Should go to empty if you ground the wire from the gauge, goes past full if open.
so it should have 12 volts in trunk tan wire key on?
July 26, 2019, 08:41 AM
EmanIf that's the wire that comes from the gauge to the tank unit. I can't remember if it will have 12v or if it's less. It should light a test light.
July 26, 2019, 08:50 PM
wideopen231hell fuel gauges go to full? Wish you could teach my truck that trick.
August 03, 2019, 11:38 AM
GoobStandard test light at the tank should get you about 1/2 full reading.....all GM's were on a 90ohm gauge scale.
Doesn't work that way on Phords and Chryslers. They will have a 12v pulse from the CVR in the gauge panel, grounded wire at the tank will get a full reading.