Hey, how's everyone doing. I'm hoping someon can provide some insight into this issue. My wife has a 99 mk3 Cabby that for some reason decided that the fuel level was top secret info and is stuck on empty. I'm trying to figure out if it's the cluster gauge or the sensor on the fuel sender. I went digging in the trunk today with my multimeter and on the connector, plugged in, with the car running I read 4.5 volts on pin 3 (brown w/ blue stripe) but read only -0.16 volts on pin 2 (purple wire).
I figured the sensor may have died because of the lack of voltage on pin 2. To try and test this I put the ignition in the ACC possition and unplugged the connector. I then connected pins 2 and 3 with a piece of wire thinking that applying voltage to pin 2 would cause the fuel gauge to shoot up to full but it still sat at empty.
I'm not sure if this is the right way to test this. Does anyone know how I would be able to confirm before I start buying parts?