HELP with 1954 Gas Gauge

[trucks72]

This is not the usual truck I deal with. I will tell you what I have done first. First, original wiring, original gauge, new sending unit. Gauge did not work. Second, original wiring,new gauge, same sending unit. Did not work. After this the man wanted new wiring so it would look better. Third, new wiring, new gauge, another new sending unit. Did not work. I checked to see if I was getting hot to gauge. I was. Checked to see if hot was going all the way to tank with the wire off the sending unit. It was. Checked to see if ground on sending unit was good. It was. I took the face plate off the gauge and moved the needle to full. Then turned the key on, the needle moved to empty. If I unplug the wire on the sending unit and take it off the needle will not move. It should move pass full right? I can not make this gauge work at all. What am I doing wrong? NEED HELP?

[steve53]

Are you using a 6v or 12v system?

[trucks72]

6 v

[steve53]

are your gauges and sending unit 6v? if one is 12 volt maybe that could do it.

if you disconnect the line to the sending unit the gauge should go to full (not grounded).

is your gauge wired properly? i would have to go look at mine to refresh my memory of what the connections look like on the back of it.

[trucks72]

i have no idea if they are 6v. he gauge does not move when the wire is taken off. How would you tell if they are 6v or 12v?

[Bigblue29]

You should be able to tell by the part number from the manufacturer. Do a little research on the brand you bought, and check it against the correct 6v model listed...

[Gene Sharp]

if you have converted over to 12 volts you must use a volt drop resistor
on the positive wire other wise you burn out the guage


Gene Sharp