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scotty17509 · 01-08-2010, 02:34 AM

Thanks for replying. No i didnt splice into any wires for the msd box. It is ran directly to the battery. Im thinking im going to go down the the wrecking yard and grab a relay for the fan and look through what wires i can on a truck without an engine. What would really help is a wiring diagram of the truck. Would you be able to post your 77 diagram?

01-08-2010, 02:34 AM	#4
scotty17509 Registered User Join Date: Aug 2009 Location: Redding Posts: 13	Re: 75 chevy wiring issue Thanks for replying. No i didnt splice into any wires for the msd box. It is ran directly to the battery. Im thinking im going to go down the the wrecking yard and grab a relay for the fan and look through what wires i can on a truck without an engine. What would really help is a wiring diagram of the truck. Would you be able to post your 77 diagram?