72 Skylark 350 coupe......Finishing up odds and ends before selling, part of which refurbishing wires.....the factory tach has: RED BLACK GREEN BLUE wires coming out the back, previous owner used WIRE NUTS to splice into harness! Any way, starting over since tach wasn't working, so if someone out there knows which wire goes where, I'd sure appreciate it!
well you should have signal power ground and illumination. idk whats whats. im guessing red is power black is ground and green signal wire and blue illumination but i could be wrong. i mean its easy to see what is illumination lol since it goes to light bulb.
