Re: removed my fuel tank ,1952 pressure guage at the fuel pump

Posted by DrewLA On 2013/7/20 0:44:01

Tim,

To test the sending unit with a meter, turn your meter to OHMS (Ω). Place one test probe on the terminal of the sender, and ground the other probe to somewhere else on the case. Then move the float up and down. As a general rule, when in the full position, the meter should read somewhere close to 0 ohms, and while in the empty position, the meter should show around 100 ohms.

Also, do you know the dash gauge is functional? Ground the sending unit to gauge wire and see if the gauge goes to full when the key is on. If it doesn't, you've got other issues as well. The most common fault in these gauges is the instrument cluster voltage regulator, which is mounted behind the cluster between the two circuit breakers. These things have contact points in them and eventually wear out either by fusing together or by not making good contact. You can eliminate the cluster voltage regulator as a possible cause if the temperature gauge works. If both gauges don't work, it's probably the regulator that's at fault.