55 gas gauge wiring
I've completed all of my wiring and seem to be having a problem with my gas gauge. With ignition in start position fuel gauge pins to full (tank is empty). I checked the connection of the pink lead to the ignition and it is on the acc terminal as indicated. I double checked the brown lead to the tank sensor and it appears to be good with no short. Any suggestions? I find it hard to believe that it was restored incorrectly.
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Re: 55 gas gauge wiring
Al,
The gas gauge works with variable resistance on the ground. I am looking at the 55 wiring diagram. To the tank it shows the black with white tracer to be the ground, and a brown wire to fuel meter itself. Try disconnecting the brown wire and see if gauge drops to "E", if so then ground the brown wire (just holding it to the tank should work), and that should make the gauge go to FULL. This should tell you if the problem is in the wiring or the sender. If it works as I described, then possibly the float is sticking causing it to have "0" resistance.
Lynn -
Re: 55 gas gauge wiring
I disconnected the brown. First at the tank and then on the gauge. The fuel meter still pins to full.
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Re: 55 gas gauge wiring
In my replacement guage the gasket had a staple in it that I took out. Bad idea, the staple is there to provide a good ground between the sending unit and the gas tank. I had to improvise and use a wire to make the link.
TylerComment
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Re: 55 gas gauge wiring
makes sense. I'll put a meter across the ground wire.Comment
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Re: 55 gas gauge wiring
Took out the sending unit. Thee was no wire for the ground side. Will put one in and see if this does it. It should.
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Re: 55 gas gauge wiring
It was the ground on the sending unit. Thank you. Works fine now.Comment
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Re: 55 gas gauge wiring
Al,
Glad you got it working, but I think I may have provided some misinformation in my initial post about how the system works. On my morning trip to the reading room today, I just happened to pick up Vol 27, #3, of the Corvette Restorer (coincidence??) for todays reading assignment.
In that issue there is an article by Dan Mazzeratti entitled, "Checking the Fuel System on 1955 to 1962 Corvette". In this article I see that the advice I first gave you seemed to be the opposite of the way the system works, although the principal is the same. When reading "0" resistance or full ground the gauge reads "E", not "F" as I had said. This seems to be the opposite of some of the systems I have had to troubleshoot on later model vehicles (I am not to familiar with the early cars), hence the "misinformation". On your car the higher the resistance, the "fuller" the reading on the gauge. I apologize for this, but glad you did get it to work properly. Hopefully the wiring diagram I sent you helped a little with this, as well as the other "questions" you were having with your electrical system.
LynnComment
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