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73-87 Chevy _ GMC Trucks => Electrical => Topic started by: KeithBradley on October 28, 2019, 03:50:58 am

Title: wiring proplems
Post by: KeithBradley on October 28, 2019, 03:50:58 am

I have a 1985 chevy c10 305 with TH350c with lockup touque converter and it has a/c .There are seven wires that come through the firewall from behind the heater box, They all had been previously cut off by the former owner in the engine compartment. Can anyone tell me were these go and were they come from. Can not find them in any wiring diagram. Colors are brown, green, blue, light brown or salmon, black, and 2 yellow. Thanks Keith

Title: Re: wiring proplems
Post by: bd on October 28, 2019, 09:34:21 am

It might be the ESC harness: brown, light green, dark blue, pink, black, yellow and white (image).

Title: Re: wiring proplems
Post by: KeithBradley on October 28, 2019, 12:57:42 pm

I would say that's what it is. Truck has a reg. HEI distributor in it now and no knock sensor. It also has 79 carb on it. Former owner must have changed these parts and cut the wires off. Thanks for the help. Keith