Fuel guage problems

[34chuck]

I have a 40 Chrysler Saratoga and the fuel guage does not work. It is the only system I've seen with two wires to the sending unit. How does one troubleshoot this system?

[Spitfire8]

Chuck: I have a '48 Chrysler, and it has two wires at the tank sender. I believe this is standard for Chrysler.

I'm assuming you have verified how much gas is actually in the tank, and know that the gauge does not accurately reflect that quantity.

Before doing the rocket-science, test to sure that the sender is effectively grounded. Run a jumper wire from one of the screws that attaches the sender to the tank, to an area you know is properly grounded (the battery?). Does the gauge now to read properly? Poor sender grounding will cause erratic gauge readings.

If that "easy-fix" doesn't work, I'd suggest you obtain a shop manual, which describes the step-by-step testing you need to do to isolate the problem.

Edited March 29, 2010 by Spitfire8 (see edit history)

[Guest elmo39]

very seldom is the actual fuel guage at fault , its usualy the sender , or faulty connections to the sender unit , for advice on the sender unit contact S.U.R.&R. is a leading manufacturer of an extensive line of replacement parts used in the Automotive Aftermarket industry.