Gas gauge not working? I think I fixed it.

I was just thinking, 6vdc was the correct voltage for my car. Yours may work on 6vac but depending on how old/worn out the gauge is you may need a higher voltage. I bought an +8vdc regulator before I had pulled the cluster. I turned out I needed the 6vdc regulator. So I had to run down a 6vdc regulator. The one I bought is only rated for 1 Amp, which is just enough at the resistances in my sending unit of 9.6 ohms full and 76 ohms empty. I am looking for a regulator that can handle more power. This one works but I like the extra current handling capability. So I will find a regulator that can handle more amperage.

If you find the voltage that works on your gauge, divide the voltage by the reading in ohms your sending unit puts out when full.
If you use a single +5vdc for your temp and fuel gauges you will probably be going over the 1 amp rating of the regulator. That is how mine died the other day