Senior Tech Team
Join Date: Feb 2002
Location: Howard Lake, MN, USA
Re: Converter Lock up Relay wiring help
That looks way too complicated.. you don't need any relays. GM didn't use them and you don't need to, either.
Run the power (+) wire from the fuse box thru the brake light switch to the solenoid.. ground the relay thru a normally open pressure switch on the 4th gear hydraulic circuit.
This locks up the solenoid when it shifts into 4th by grounding it and unlocks it when you hit the brakes by cutting off the + power supply.. you can put a vacuum switch inline betwee the fusebox and brake light switch to unlock in 4th gear when engine vacuum drops to prevent lugging when climbing a hill or something..
You might need to get a brakelight switch from an 80's car to make it work- I used one that I think was from a Caprice when I put a 700r4 in my 74 Monte Carlo and the brake light wires plugged right in..
"Detroit hasn't felt any real pride since George Bush went to Japan and vomited on their auto executives, I tell you whut"