Hey guys,

I feel kinda stupid right now but I got a Tach from the junk yard, its a 3 1/2 inch sunco or something but its got 5 wires, 2 red, 1 blue, 1 black, and a yellow.I know the red wires are the power of some sort and the back is like a ground but whatdo the others go to? How do I hook it to my 93 C2500? Thanks guys.

 

The blue might be for the light...the other wires you should try to find out for sure what they are for.
Does a 93 have a distributor?

I haven't hooked-up a tach for a long time...it was a 86 305 with HEI and was easy.

Be sure of those wires and where they are supposed to go.

 

On your coil there are 2 pigtails that are plugged into it. One from the distributor and one from the harness on the firewall. The latter has a single wire that is covered and stored. That is the signal lead to the tach.

 

Thanks guys, I'm gunna work on it tonight. I like the look of the tach and its the same color as my truck so that looks cool to me at least. Have a good one

 

AintNoHo, Which wire do I tap into for the tach? Maybe I just dont get this one

 

If you mean on the tach, I don't know you'll just have to play with it. I would guess the blue wire. If you mean on the coil, it's a single white wire with a spade clip and a plastic cover. You don't have to cut-up your loom, you just connect to it.