Gas Gauge

[jf100]

I seem to have a problem like another user did only when I fill the gas tank up it goes way past the full line and when it runs out of gas it is on a quarter tank. I have replaced the float and the sending unit. Any ideas. Thanks you for any help.

[1972hiboy]

Adjusting the instrument panel regulator would get the gauge back in range. it will also change the swing of all the other gauges too though.

[jf100]

How do you adjust the regulator on the instrument gauges?

[Thipdar]

I seem to have a problem like another user did only when I fill the gas tank up it goes way past the full line and when it runs out of gas it is on a quarter tank. I have replaced the float and the sending unit. Any ideas. Thanks you for any help.

It would be a big help if you told us what year your truck is, and whether you're running dual tanks, which tank you're talking about, etc.

[jf100]

Sorry about that 1969 F 100 custom cab Main tank behind the seat. I have 3 tanks 2 of them are disconnected ready to pull them out. Switch is set to main tank.

[1972hiboy]

How do you adjust the regulator on the instrument gauges?

If you pull the dash out and locate the instrument panel regulator on the back. there is a small screw or hex screw on the back side in between the terminals. You turn in or out to get the gauge in the proper range. I forget what screwing in vs out does. I believe screwing clockwise increases voltage and counter clockwise decreases voltage. I will try to find a pic of what if your not familiar with that they are or what they look like.