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Old April 16th, 2009, 08:39 PM   #1
88mudder
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Fuel sending unit testing

Is there a way to test a fuel tank sending unit with it out of the tank? I have a feeling mine is still good, but wasnt working becuase the terminals are rusting. Truck is a 84 Ranger and it has 2 metal prongs coming out the top where a connector goes over top. Thanks for any help.
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Old April 16th, 2009, 09:03 PM   #2
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ohm meter.
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Old April 17th, 2009, 12:34 PM   #3
BigBlkYJ 355
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if the gauge is known to work, connect it back to the truck and move it by hand and see if the gauge moves.
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Old April 17th, 2009, 08:48 PM   #4
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The terminals were so rusted out i tried cleaning them with a brush but the prongs just busted off. Can i just connect the main power wire to the power wire on the sender and ground the black wire? Like a manual hookup not using the connector.
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Old April 17th, 2009, 08:51 PM   #5
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Quote:
Originally Posted by BigBlkYJ 355 View Post
if the gauge is known to work, connect it back to the truck and move it by hand and see if the gauge moves.
most cars have a buffer. meaning that the gauge doesn't react as fast as the sender does. so it may a peer to be bad when it really isn't. the best way to do it is with an ohm meter out of the tank.
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