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Old 04-02-2010, 12:52 AM   #1
zimmstoy
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Join Date: Feb 2008
Location: Cedar Park, TX
Posts: 214
Gas gauge stuck past full

I am at a loss and can use some guidance.

Since I bought my 74 Blazer last year, the gas gauge has not worked. It stays past FULL whether the truck is on or off with no movement at all. I pulled the sending unit a few weeks ago and it tested bad, so I went ahead and got a new sending unit, hooked it all up and still have no change on the guage.

What are the next logical steps to get this working again?
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Old 04-02-2010, 04:19 AM   #2
James McClure
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Join Date: Dec 2007
Location: Saratoga Springs NY
Posts: 859
Re: Gas gauge stuck past full

Key on, disconnect sender wire and check for voltage. If you have voltage, ground the wire. Guage should show empty. If it dosen't guage is bad. If you have no voltage, check fuses and start looking for an open circut between the guage and the sender. Jim
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Old 04-02-2010, 06:58 AM   #3
Stitch
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Join Date: Jul 2008
Location: Where I come from, it's cornbread and chicken...
Posts: 3,122
Re: Gas gauge stuck past full

check the grounds at the fuel sender on top of the tank...99% of the time that's the culprit
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