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Just trace the wires from the antenna. Exact locations are different in vert vs. coupe and across years because the CDM moves around.
You could also look in your FSM to find the wire color you need at the relay.
If all else fails, the usual corvette places sell a switch+harness, which presumably comes with instructions.
Don't have a FSM yet, been tryin' to get one used - almost had on in the C4 FS forum, but somebody got there 1st
I really don't want to pull up the carpet more than I have to. I guess I'll just purchase the $2 switch from CC for $20, and make a thread on how to do it for the next Joe.
I bought a kit from but have not had time to put it in. What year do you have? If you PM me your e mail address I'll try and scan instuctions tomorrow at work and e mail them to you.
in all honesty i woudlnt be suprised if the kit that they sell has u go all the way back to the antenna to splice in. the kit midamerica sells looks like it has a decent chunk of wire to it.