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09-09-2012, 12:51 PM
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#1 |
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Registered User
Join Date: Sep 2012
Location: Calgary, Alberta, Canada
Posts: 92
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Fuel Guage
Put in a new send unit from LMC and guage is still not working. It goes up to full when lead is disconnected but goes down to just over empty when connected. Traced wire back to fuse box - all good. Ideas ?? Thanks!
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09-09-2012, 01:17 PM
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#2 |
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Active Member
 
Join Date: Jul 2007
Location: Centrally located between Houston, Austin and Waco. BCS area.
Posts: 7,947
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Re: Fuel Guage
The test you performed indicates the gauge should be working so the problem has to be in the sending unit. Several years ago I replaced mine and got a defective one. There's some small copper fingers that ride on a strip of coiled wire and the fingers were bent and all out of whack. I had to reorder.
The next one I was bent in a certain way that kept the float from moving up and down. It was touching the tank itself. I had to re-form the unit. If you have an ohm meter you can test by removing it to make sure it's working. One meter lead on the pin and the other to the sending unit. Meter should go up and down as you move the float arm. More info on this link: http://www.6066gmcguy.org/Electrical-02.htm
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68 GMC 250/3 speed Saginaw p/b p/s 69 Chevy 350/350 currently in pieces still lookin for a cab 06 Trailblazer I just want a vehicle that I can work on, that won't talk to me, leave error msgs or keep track of how I drive... |
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09-09-2012, 02:50 PM
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#3 |
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Registered User
Join Date: Sep 2012
Location: Calgary, Alberta, Canada
Posts: 92
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Re: Fuel Guage
Thanks for the tip! I'm glad the guage is ok - I suspected so. I'll pull the send unit out and test it when I get the engine swap done. Thanks again!
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