carnut169

I'm looking to utilize the stock sending unit to display a fuel level % on the MXL. Can someone explain how it works? I've got a yellow and black wire which lead to the sending unit. Id guess the yellow gets 12v and the black is sending a range based on the float level? Blue/red is pump positive and black is pump negative.

PatCleary

I think yellow is signal, black is ground and red/blue is power, but I'd check the wiring diagram if I were you. You'll need a resistor between power and signal to generate an output voltage.

rharris19

iTrader: (41)

Ground the Black and run the Yellow to your signal input in the fuel gauge if it can work off of just a resistance signal. If it needs a positive signal, then you will need to add a resistor, like Pat said. The other Black and Blue/Red power the fuel pump.