Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - 87 Camaro - Gas gauge stuck - FULL
View Single Post
  #13 (permalink)  
Old 06-07-2005, 08:04 PM
66GMC's Avatar
66GMC 66GMC is offline
Get in, sit down, hang on

Last journal entry: Cab Removal
Last photo:
Join Date: May 2005
Location: Olds, Alberta Canada
Age: 59
Posts: 2,764
Wiki Edits: 0

Thanks: 33
Thanked 94 Times in 89 Posts
Bared wire, perhaps?

I may be wrong, but the way that I understand gas guages is that the sending unit provides the ground, and that a rheostat is used to provide variable resistance.

When the tank is full, the rheostat is in the "fully grounded" position offering zero resistance, and the guage reads "full"

At 1/2 tank the rheostat is only supplying 50% of the resistance value... etc

So my theory is that if the wire leading to the sender has been chafed and grounded before reaching the sender, it will always display a "full" tank.

Reply With Quote