First make sure the wires are hooked to the back of gauge correctly. The fuse powers up when you turn the ignition on. One is TAN, which goes to the sender at the tank and the other is purple that gets it's power from the fuse panel. I have a wiring diagram for my 69, which should be same as the 67. I would love to know how much gas I have so I can stop guessing on how much is left. Any help right now would be very appreciated. I was thinking that maybe it is getting a bad ground but I don't exactly know for sure or even how to fix the ground on the gauge. This made me think that I could have wired it wrong so I swapped the wires again and the fuel gauge dropped down to empty. When I turned the car over the power sent from turning it over shot the fuel gauge up past full. I sanded the terminals down a bit and wired the gauge back up. Today I thought that maybe the terminals were just too rusty for the wires and the gauge to have good contact. I wired it in the other day and it didn't want to do anything so at first I thought that the wires might be in the wrong spots so I swapped them around and still nothing. I did read that there are only supposed to be two wires that go to the fuel gauge which are the sending unit wire and a wire that leads to the ignition so when you turn the car over the gauge gets power. So the wiring in my 67 was totally butchered when I got the car and I have been trying to get my fuel gauge to work for the past couple of days.
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