[1qikta]

Originally Posted by "QUICK-SILVER"

You use both probes to read across or through something, one probe on each end.

Get your spare sending unit......
Put one probe on the wire terminal and the other againt the mounting plate. If it's good you'll get a reading. Move the float up and down, down should read 0 ohms resistance, and up should read 90 ohms. Readings should be close anyway.

On the car, tan wire to tank and ground will be your touching points, with connector unplugged. With a bad sending unit or tank ground, meter should give an infinite reading. About the same as just holding both probes up in the air, not touching.

Touch your probe tips together to see what it's zero reading is. Most wont show a true zero, usually a .0? number.

Try checking some plug wires from end to end. You'll find that interesting.

Check the difference from contacts to base on a 1157 bulb. You can see the different resistance for bright/dim-brake/tail.

It'll take some trial and error to learn the quirps of the meter, but it's fun and can be very usefull.

PM or E a number if you have any questions.
Clay

Thanks Clay,

I tested some stuff...

an old plug wire gave me .23
touching the probes together gave me .03
a 20 amp fuse gave me .02
my spare sending unit .0L
the sending unit in the car gave me .0L
an 1156 bulb gave .06
an 1157 gave me 3.3 (on bottom) and 2.8 (side to bottom)

I guess both sending units are bad.Any other tests on the sending units?