I wondered about that as well , so I ran two new 18ga seperate wires from the gauge ,under the dash, out the door , under the hood and to the gauge and 12V supply (completely seperate from the original wiring harness).I even took a pair of alligator clips and grounded the gauge ground post to the metal dash . None of that made any difference .
Originally posted by atomarc:
greg63,
I'm not 100% clear on the workings of your gauge, but I think it is important that the gauge has a proper ground in the dash assembly. This could affect how the gauge compares the 'in dash ground' with the ground provided by the sending unit.
With the way the gauge is constructed, it is usually a work or no-work kind of deal. Your gauge is working, but incorrectly.
If the accuracy of the gauge depends on the variable ground supplied by the sending unit, there could be a possibility that the wire leading to the sender has been damaged and is 'leaking' to its own ground.
These are just guesses on my part though. :confused:
Stuart
