this maybe a funny question... but I've bought the car first with a boost and water temp gauge on a pillar installed already, I got the boost gauge connected no problem but the water temp is another story. I realized its not manuel but its electronic. Its an Autometer electronic water temp gauge, which I have no clue how to install. There's 2 black wires, 1 blue, 1 yellow, think there maybe more... Can someone explain to me which wires go where to the ECU?

 

Try looking for the instructions here:

http://hp.autometer.com/instruction_...ad/gauges.html