Fake out the fuel gauge?
After only 20,000 miles, it looks like my fuel level sender unit is kaput again. No chance of getting it fixed under warranty this time. I wouldn’t mind so much since I use the tripometer instead, except now I have a yellow caution triangle and flashing Fuel icon all the time.
So this weekend I pulled the plug for the fuel sender intending to short out the leads with an appropriate level resistance to fool the instruments into believing the tank is always full. There are four wires going into the sending unit: green/blue, green/red, brown/blue, brown/green. The brown ones seem to be ground. The green ones show no DC voltage when the ignition is on. What’s going on here? Is the oscillator for the capacitive sensor separate from the fuel sender unit, thus it's AC rather than DC to the sender unit? If so, is it possible to put a capacitor across the right leads to mimic a full tank? Why the ground leads?
Anyone have any ideas on how to proceed?