The way I have my 89 Camaro wired (was a 5 speed) one wire to the ecm and the other to the brake switch to supply 12v.
The way I have my 89 Camaro wired (was a 5 speed) one wire to the ecm and the other to the brake switch to supply 12v.
Looks like it's supplying 12vdc either via the brake circuit of via the vacuum, which either of each will unlock the TCC depending on the condition.
Right, power always on through brake switch to TCC solinoid and a wire to ECM that is ground for lock up. If brake is applied? Looses power.
1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
-= =-
The TCC ground signal from the ECM will have to feed a relay that will provide 12vdc to the TCC solenoid.
Took me little bit to figure it out because the '84 and '85 s/t service manuals do not show the wiring for the TCC vacuum switch.
This is the diagram for what I need.
Last edited by damanx; 11-10-2013 at 04:41 AM.
Looks like it was wire alot like my 83 G20. Except both blue and green wires run into the firewall connector and both run into the trans as well. On my 83 G20 the vacuum switch controlled the TCC in 2nd and 3rd gear in 4th gear lockup was controlled by a pressure switch in the valvebody and brakeswitch alone. The wiring also controlled the EGR bleed solenoid that bleed away the vacuum signal to the EGR valve in 4th gear and allowed additional air into the engine via a metered air leak.
Last edited by Fast355; 11-10-2013 at 05:02 PM.
Bookmarks