Fuel gauge issues

[Mailboxperry]

I pulled the unit out again today and ohm it with it out of the tank. It only ohm from .03 to .21. Again only reads around 1/4 tank. What do you guys think? I called 2 dodge dealers and not one can tell me what the unit is suppose to ohm at.

[MnTom]

I will try to get the OHMs from a new one that I have in my garage tomorrow for you.

[Gypsycraneoperator]

Sorry to bring up an old thread but did you ever find out what was wrong with it? I am having the exact same problem,  except when I test the pins on the plug that goes into the plug on the tank I get 11.49v, New sender ohms out properly but having the same issue as op. Any help would be much appreciated. 

[Chris O.]

Tested on 2000 Dodge Durango PCM, 20 ohms - full <-> 240 ohms - empty

 

@ 10 to 0 Ohms, short-circuit            @ 0.40v to 0.00v

@ 20 ohm full                                     @ 0.55v       100%
@ 179 Ohm, Fuel Reserve Light on   @ 5.95v        17%
@ 180 ohm, before the low fuel light  @ 6.00v        16%  
@ 220 Ohm nearly empty                   @ 7.00v          2%
@ 240 Ohm empty.                             @ 7.30v          1%

@ 1Kohms to ∞ infinite resistance Ohms, open-circuit 10.00v+    MAX 

 

Voltage       Tank% 

@ 0.55v      100%

@ 1.00v        95%

@ 2.00v        77%

@ 3.00v        63%

@ 4.00v        48%

@ 5.00v        33%

@ 6.00v        16%  

@ 7.00v          2%

@ 7.30v          1%

Edited March 1, 2018 by Chris O.