TCC wiring, is this right
Thread Starter
Melting Slicks
Joined: May 2003
Posts: 2,076
Likes: 281
From: Dyersburg TN
TCC wiring, is this right
Here is how I think it works: the converter is controlled by a relay. the relay draws 12v from the brake light switch and grounds through the computer terminal 'P'. When on, this relay connects the computer ground terminal 'U' to the transmission. The trans is drawing 12v from ignition thru a 3rd gear only switch to the TCC solenoid and grounding thru the above circuit. Below is my drawing. is this correct?
I know these colors are not right, just trying to show different wires
I know these colors are not right, just trying to show different wires
Last edited by dburgjohn; Aug 20, 2009 at 12:19 PM.
Team Owner
Joined: Jul 1999
Posts: 65,492
Likes: 230
From: Orange Park Florida
Your schematic there is a tad hard to read, so I can explain how I did mine....
first off, change the brake light switch to a BWD S870.....the new section of the switch toward the rear is normally closed, and opens when you push brakes, the typical/older section you plug into with the Or/Wh wire plug is to the brake lights...press peddle and close switch/light lights....
so to take a jumper from ORANGE to one of the new section terminals.....
the other term of the new section goes to the tranny RED wire which is one side of the solenoid directly with no other connections....
the computer controlls the lockup on the grounding side of the solenoid, along with the switch in there you have marked 3rd gear....most of them are 4th gear/overdrive at that point....same thing if you have a thm350c....lockup 350 tranny....
so the internal sw of the tranny is in parallel with the computer....either/or will lock up the converter....
first off, change the brake light switch to a BWD S870.....the new section of the switch toward the rear is normally closed, and opens when you push brakes, the typical/older section you plug into with the Or/Wh wire plug is to the brake lights...press peddle and close switch/light lights....
so to take a jumper from ORANGE to one of the new section terminals.....
the other term of the new section goes to the tranny RED wire which is one side of the solenoid directly with no other connections....
the computer controlls the lockup on the grounding side of the solenoid, along with the switch in there you have marked 3rd gear....most of them are 4th gear/overdrive at that point....same thing if you have a thm350c....lockup 350 tranny....
so the internal sw of the tranny is in parallel with the computer....either/or will lock up the converter....
Thread Starter
Melting Slicks
Joined: May 2003
Posts: 2,076
Likes: 281
From: Dyersburg TN
I see them in the circuit, but they seemed to be parallel, not in series, that is the state of those relays did not seem to make or break the circuit. I was trying to understand so I can see why my 350c does not lock. Air pump and EGR along with their relays have been gone for a very long time from this car.
Thread Starter
Melting Slicks
Joined: May 2003
Posts: 2,076
Likes: 281
From: Dyersburg TN
full drawing
Here is the full drawing I had. Tried to use color to show the lines. I see the other devices, but from the way it is drawn, I don't think they do anything. If I am wrong, can someone point it out?
