Torque converter

The PCM receives a signal from the brake pedal position switch called also BOO switch. torque converter clutch will disengage when brake is applied faulty switch will effect TCC operation. also, check the TCC solenoid.

Thanks for the reply. Is this switch located behind the brake pedal and independent of the brake light switch?

It is a part of the brake switch located on to of the brake pedal.if you have a scanner you can check it by stepping on the brakes while watch data information. you should see it switching from off to on and so on.

so where is the TCC solenoid?

On the 1997 models four solenoid valves are located on the valve body .
solenoid valve actuate shifting and torque converter lock up by switching oil flow through passages in the valve body.

I believe I found the problem. I discovered my brake lights do not work. By looking at the wiring diagram, either the brake switch is bad or I blew a fuse.

very good.
keep us updated.

Go figure this one out. I removed the brake switch and found it to be okay. I reinstalled it and still no stop lights. Held the switch in the on position and removed the tail light assemblies. I found the bulb contacts to be corroded. Cleaned them and now I have got stop lights. I took the car for a drive and torque converter locks up again.

Solenoid is in at the transmission valve body.
you need to remove transmission oil pan to gain access.

Transmission seems to work okay now. Thanks for the help.