Posted by Mark - IN. on June 14, 2008 at 04:17:57 from (64.12.117.74):
In Reply to: Ohms a fuel gauge posted by Dan B on June 13, 2008 at 19:48:40:
Good morning Dan, I'd like to help you but am not sure. The only thing that comes to mind is going across the leads of the guage itself with an ohm meter, but I'm guessing that its voltage or current driven by the sending unit itself. Having never opened either, I would guess that the guage requires say either 6V or 12V to read full, but the sending unit has perhaps a variable resister (potentiometer) that when the tank is full allows either 6V or 12V to drive the needle full guage, and as the fuel level drops, increases resistanse thus decreasing voltage to the guage and dropping the meter. Unless someone has had past experience with the specific guage that you're dealing with, you might have to find it in a fuel sending unit book down at the auto parts place...and that'd be a good or best bet. I would not be surprised if a sending unit manufacturer's parts book wouldn't have a unit listed for an application...if you know what the fuel guage came out of, look it up.
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