Homemade gauge test tool, C-3826

No, the object here is to test the GAUGE, not the sender.

The way I look at it, gauge troubles stack up like this:

1 Poor connection in the 12-14V IGN supply, wiring, connections at the PC board connector

2 troubles with the limiter, IE bad socket connection, limiter not working properly

3 gauge problems, (sticking, out of cal) or connection problems at the PC board

4 sender wire problems/ connections

5 bad/ out of calibration senders, or sticky/ rusted tank sender

6 bad connection in the ground/ return path

You can check the supply voltage with a voltmeter

You cannot really check old -- style limiters (pulse)

You need a specified resistance to check the gauge(s) (the device I built)

You need an ohmeter to check wiring connections, and resistance of the senders and ground path.