How about an auto supply?
Yellow is ignition power, red is power from the engine, black is ground, green is tach signal, blue is backlighting (wire that to the nav lghts, which it looks like yours is already wired that way), white is the fuel sender lead
Also saw that the fuel is down to 1/8th :cry: :cry: That's going to be an expensive bill @ about 120 gals.....
I'm pretty sure that it was working on the other gauge though I'm going to climb back in there this morning. Any idea what color the TnT wires are in the bundle?The old tach had a connector that had 2 wires only. The new gauge has 4 wires in the connector.