Converter lockup wiring diagram

[Gremlinsteve]

I’m curious if anyone can direct me to a simple method of locking up the converter on this 200c transmission

I search for it with no luck

 

[Bonnewagon]

I had a 1983 T-350-C with lockup. On the side of the transmission case was a four cavity plug. Of the four wires that went to it one was 12 volts switched ignition from the PCM. The other was a ground. By grounding that wire it locked up. The way it works is the lockup 12 volt wire was energized at all times in RUN. So when the engine was at operating temp, the brakes were NOT on, and the MAP sensor knew you were just floating along, then the PCM grounded the ground wire. All it is is a solenoid inside the case that plugs a fluid line. Also in there is a high gear switch so it only works in high gear or overdrive. I just ran 12 volts ignition switched to the one wire and the ground to a toggle switch on the dash to activate the lockup. It was good for about 300 rpm at speed. I kept the brake switch to de-activate it.

 

[Gremlinsteve]

Thanks
I’ll be working on the car this weekend

 

[ssn696]

B&M used to sell a speed-sensor switch kit. It was meant to hold off locking the converter until a speed was reached. You could hack that solution to work with your 3-speed.