Car stalls at lights

Well they are probably referring to the TCC (Torque Converter Clutch) solenoid switch that attaches to the break pedal. When pressure is applied to the break it is supposed to disengage the torque converter (as you referred to overdrive). The TCC is supposed to engage at freeway speeds in order to reduce gas consumption, if it doesn't disengage at lower speeds it will stall the car.

Sometimes the switch on the back of the break pedal will share the same harness as your break lights. So disconnecting the switch at this point would eliminate break lights in some cars.

I am not familiar with your vehicle but there is also a wireharness going to the transmission on some cars that will disable the TCC.

I have been told this type of stalling could also be related to the fuel system. I would have fuel pressure checked out for a possible failing fuel pump. If this is the case replace that and the fuel filter.

I'm having similiar problems, but I hope this helps you.

Just to add on to my previous post. I've found out on some newer vehicles the switch on the break pedal is responsible for the cruise control and the computer system will bypass the switch and still engage/disengage the TCC. Disconnecting this switch on newer vehicles will just disable your cruise control and not affect the Torque Converter at all.

Review my earlier post. Disconnecting the wire for the TCC may not disengage its function. I would recommend having the TCC replaced, especially if this usually happens after breaking 50MPH prior to it stalling on coming to a stop. I just had this problem in my 92 GA and disconnecting the wire didn't solve the problem, but a new TCC solenoid did. She runs great now!