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.