Wiring Help please

[otef546]

I have a truck that was apart when I got it. Trying to sort the wiring. I have a harness that has 3 wires , one a solid brown, one a solid blue and one a brown wire with a white stripe. Any info?

[otef546]

Looks like it could be harness for a turbo 400 but I’m 99 percent the truck was born with a three on the tree so I’m not sure

[kwmech]

Possibly a TCS harness.

Transmission Controlled Spark: only allowed vacuum to the dist after the trans shifted into 3rd gear. Should be accompanied by a pressure switch at the trans, couple vac lines and a solenoid that bolted on the right hand side of the carb that the vac lines hooked to

[rechinca]

Definitely the TSC. Mine wasn’t hooked up and had the ends cut up by the intake. I stripped it all out including the relays.

[kolle_hond]

I also had one in my truck, I was worried because one pin broke off the TCS, but it turns out it wasn't needed, so I just removed the thing (The silver and black box in your second picture). I still need to trace and remove the rest of the associated wires.

[rechinca]

It’s pretty easy trace, one on the transmission, one on the intake, the sensor in passenger side head and then up to the relays by the master cylinder. Took about 5 minutes to take it all out. Just be careful, that sensor in the head is a coolant sensor in the water jacket. Drain the system first or you’ll have a wet mess. Good time to flush the system and refill it.

[68 P.O.S.]

Yes, that's the TCS wiring. It was just a short lived early form of emissions control that really didn't do much. Get rid of it, you dont need it. Put it up for sale in the classified section. I have seen a few people looking for one for their restoration.