67-72 Chevy Truck fuel gauge diagnostics 101 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Shotgunn · 04-15-2018, 02:57 PM

I may need therapy before this task is accomplished...
Gauge is at 3 o'clock position..
new tank/sending unit/ wires go all they way into the cab..proper ground.(LMC under bed tank)
pull the brown wire clip out of the fuse block and it reads 92 ohms with a full tank of gas. plug the clip back into the fuse block an check it while plugged in..32 ohms..back feed? I have 12.6 volts at the #3 on the plug with the key on. the battery and temperature gauge is disconnected. after market gauges installed oil/volts/temp.

04-15-2018, 02:57 PM	#11
Shotgunn Registered User Join Date: Dec 2016 Location: Lethbridge AB Posts: 22	Re: 67-72 Chevy Truck fuel gauge diagnostics 101 I may need therapy before this task is accomplished... Gauge is at 3 o'clock position.. new tank/sending unit/ wires go all they way into the cab..proper ground.(LMC under bed tank) pull the brown wire clip out of the fuse block and it reads 92 ohms with a full tank of gas. plug the clip back into the fuse block an check it while plugged in..32 ohms..back feed? I have 12.6 volts at the #3 on the plug with the key on. the battery and temperature gauge is disconnected. after market gauges installed oil/volts/temp. Last edited by Shotgunn; 04-15-2018 at 03:37 PM.



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