Fuel gauge is bouncing

Tiny
BALLBALL
  • MEMBER
  • 1991 CHEVROLET S-10
  • 278,000 MILES
I am having problems with my 91 s10 2.8 fuel gauge not working how do I check the current going to or coming from fuel tank to gauge? I change sending units the gas hand will come down to half way then goes back up to pass full never drops down on empty?
Saturday, December 31st, 2011 AT 1:05 AM

4 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Make sure there is good ground going to the sending unit. On the hot wire make sure it is a blinking light with a test light. It cold be hte gauge as well.
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Saturday, December 31st, 2011 AT 1:07 AM
Tiny
BALLBALL
  • MEMBER
  • 8 POSTS
Hy hmac300 ok how I find the hot side turn the switch on and when I get back there I guess I could just get the test light and stick into the wires so which ever 1 blink is gonna be the hot 1 rite also my wires going to the tank are all black and even coming from the truck are black also thanks
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Saturday, December 31st, 2011 AT 1:32 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
It's the pink wire, if you can't see the color get soem choke cleaner and clean teh crap off of it so you can
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Saturday, December 31st, 2011 AT 3:22 PM
Tiny
BALLBALL
  • MEMBER
  • 8 POSTS
Ok I will do it tomorrow I notice when I unplug the tank sending unit wires it went back to full while I had the switch on then I turn the switch off and plug it back up and turn on the switch it went to half tank I no I dont have tht much gas in there I only put 5 gallons in there drove it 69 miles so I no it should be down a lil more
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Sunday, January 1st, 2012 AT 2:05 AM

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