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zoegrant
11-09-2009, 06:51 PM
Hi...can the fuel sending unit be tested to see if it is good or not ?...if I took the unit out of the tank and had it in my hand with a wire running from the ignition switch with the switch in the on position and the wire hooked up to the sender terminal and the unit grounded to the frame...when i move the float up and down ...wouldent it register on the fuel guage ? ...or
what is the best way to test the fuel sending unit ?....John

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Alan
11-09-2009, 07:04 PM
If you have the sending unit out, just take an ohm meter and hook the black wire to the flange and the red to where the wire goes and it should read 0-99 ohms.

ozarkman
11-09-2009, 08:11 PM
Is that 0-99 for all Studes?

From deep in the Ozarks...

Fred

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41 Frank
11-09-2009, 08:15 PM
You want to also make sure you have current back at the sending unit. You can ground the sending unit wire, turn key on, gauge should go to full. this will establish that your circuit is intact and your dash gauge is working.

zoegrant
11-09-2009, 11:36 PM
OK...I have tested for omhs at the sender and it does register but grounding out the sender wire and turning the key on does not make the guage go to full....so...how can i seperate the problem from the sender vs the guage ?...Could it also be a co-incidence that the temp guage which is right next to the fuel guage in the cluster,that it is not working also ?..John

41 Frank
11-10-2009, 10:55 AM
Get a test light and check for current at the sender end of the wire,should have some current with key on. If no current there check for current at back of gauge where wire from sender connects.If you have current there the wire to sender has an open circuit. If no current there check other terminal on gauge which would be the feed wire. If current there you have a gauge problem, if no current there you need to check wiring to gauge further. If you have current on both sides or one side of gauge you likely have a gauge problem.This is the best way I can explain it so you can pin down the problem.


quote:Originally posted by zoegrant

OK...I have tested for omhs at the sender and it does register but grounding out the sender wire and turning the key on does not make the guage go to full....so...how can i seperate the problem from the sender vs the guage ?...Could it also be a co-incidence that the temp guage which is right next to the fuel guage in the cluster,that it is not working also ?..John