Hello everybody. I just bought a 74' c10 and im trying to put some autometers in it. Problem is the original gauges were connected to a printed circuit and the autometers wire up different. i need to find out how to wire my autometers up to this thingthis plugged into the curcuit board. im just not sure what each of the wires does. is there a way i can test them or a 74 c10 wire color code somewhere? if anybody has any info id really appreciate it

 

Unfortunately I can't find a wiring diagram for this puppy.

However, if it was my project.... I'd open up that stock cluster and trace the circuits on that flimsy plastic PC. It'll be easy to find the ground and illumination power first. Then look for the power circuit that goes to all gauges. Then you should see one signal line to each gauge.