Quote:
Originally posted by marked001
I forget the exact purpose of the relay....but I think the vtec solenoid requires a (-) input to activate it and the RPM switch puts out a (+)...so the relay switches it to negative. its definitely needed, you can get em at any auto parts store..
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Actually,the relay is used to turn on a high demand circuit,if you plug it direct(without any relay) it will burn the wires or the rpm activation box.You need the relay for this to work.