Gas gage not working

[Gary Seymour]

I recently started driving my '62 and the gas gage isn't working. I put in a new sending unit from LMC Truck.

I grounded the hot wire at the tank and the gage went to full. Does that mean the sending unit is no good?

[Toyz]

If other gauges are working correctly; it is likely the float, sender or a poor ground. A better (and safer) test is to use a test lamp. The IVR delivers a pulsed voltage which will cause the test lamp to pulse as the gauge slowly makes its way to full if working correctly. By not working, if you mean remaining near or at empty position, you may well have a saturated float.
Paul

[chris401]

I recently started driving my '62 and the gas gage isn't working. I put in a new sending unit from LMC Truck.

I grounded the hot wire at the tank and the gage went to full. Does that mean the sending unit is no good?

I didn't have any success with LMC sending units. The replacements they sent me had GM rheostats. Seemed it was 9 vs 13 oms. Would not come up to empty till it had 5 or 6 gallons in it. Dropped in a Dennis Carpenter and it worked fine.