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Old 10-12-2017, 06:19 PM   #4
VetteVet
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Join Date: Jan 2005
Location: Kalamazoo, Michigan
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Re: 12v to the fuel sending unit

Quote:
Originally Posted by Sweeet67 View Post
Vettevet, thanks for the reply. I looked at it again last night. I moved the wire back to the fuel gauge position, The needle is at 3 o'clock position with the key off. Then I turn the key on, it moves a little but not to where it should be.
Knowing my luck, I fried the resistor in the brand new sending unit.

You can put an ohm meter on the sending unit terminal and the ground, and you should read between 0 - 90 ohms if it's good, If you have fried the resistor it will continue to read past full.

You should ground the fuel terminal on the fuse panel and watch the gauge go to empty, which will tell you that the gauge is working. You have to be sure that the tank and the sending unit flange is grounded to the truck for the gauge to read.
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