Fuel guage issue

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Oct 9, 2011 | 02:24 PM

motomech10

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Fuel guage issue

1987 F150 4.9L single tank

Replaced sending unit, checked wiring and power through the circuit. As far as I can tell the guage itself may be faulty. Is this common problem for this model year? Can I replace just the fuel guage or would it have to be the entire instrument cluster or should I just install an aftermarket guage?

Suggestions, ideas?

Thanks

Oct 9, 2011 | 05:37 PM

motomech10

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Joined: Oct 2011

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UPDATE

I pulled the instrument cluster and fuel/Oil pressure guage unit out and directly tested the fuel guage. I found a burnt spot (open) on the positive+ power circuit to the guage in the flexible circuit board. It appears the guage itself is faulty also. I can get the needle to swing one way, but not the other. I suspect whatever caused the short in the positive circuit, may have fried the guage also. Hopefully a replacement will fix it.

This is a picture of the complete unit with a close up of the guage itslef removed from the unit in the bottom half of the picture. I'll try to follow up once I try a replacment.