[Chrysler300] Gas Gauge Problems
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[Chrysler300] Gas Gauge Problems

Someone recently mentioned having problems with a dead Gas Gauge. I 
have also been working for a solution to the same problem and here is 
a brief summary of what I found.

Gas gauge stopped working and was resting on empty even with a full 
tank. 5 years ago had changed the sending unit and figured this was 
the problem again. Ohm test on the old unit and the new were the 
same. Then figured that the gauge was now faulty so sent it out to JC 
Auto and had it rebuilt to the new digital version.  Rebuilt the 
instrument cluster with a new gauge and still nothing. Checked out 
the two spare clusters on the work bench and found that one was 
corroded at the pin connector and after cleaning seemed to work 
correctly. Did the same to the cluster in the car and still nothing. 
Tried testing the new sending unit by shorting to the car wiring and 
it worked at both the plug connection along the door sill and by 
bypassing the old unit at the gas tank Worked fine. Still nothing at 
the gauge when reconnected. have had the cluster out at lest four 
times and the wiring checked at the sill plug three times. Each check 
is a project in itself. Finally after giving up I left the car at the 
dealer and asked that they try to sort it out. The went thru the same 
tests and finally determined that the small connector at the sending 
unit was worn out (52 years old) and did not pass thru the connection 
to the Lite blue wire. By plugging in the wire with an alligator clip 
did not show this and I had missed it when checking the new sending 
unit. $1.00 for a new connector and labor charge and everything works 
as it should. The devil is in the details  and misleading test 
results have led me astray all winter. Just food for thought when 
working on this problem, and leads credence  to the sentence in one 
of MOPAR blogs that everyone driving one of the cars always carries a 
couple of gallons of extra fuel since they are never sure what the 
gauge is actually showing. Thanks for listening.

John Holst...

Posted by: John Holst <jholst@xxxxxxxxx>

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