1993C4LT1

So I got my scanner working. It didn't want to work on LG G5, for some reason. But would work on various other android devices.

Got some logs this morning. It was weird tho. It did read "TCC Locked" at 47mph and above. But it read that ever since. Even at a stop, it would say locked. Trust me, that is not correct.

AJT84

Pics are from a 92 FSM. Maybe these can help

1993C4LT1

Opening my FSM would have been the last diagnostic procedure for me, had I not been able to do any logs. Will try one more time with a log. If not, then I'll go by the FSM. Thanks tho

pcolt94

I would say try to get a Tech1 or 2 and try to get a reading on the switch. A corvette shop would probably have the scanners and knowledge necessary

I knew my problem was the switch was right on the edge of making contact. Could be caused by wear on the switch contacts or booster changes and the adjustment is a nats a** off. Regardless I dropped the knee kick plate for a better look. I was going to put a piece of tape on the switch contact point but instead I thought I would try to adjust the switch assemble 1 click. I was afraid of something was going to break but it worked OK. So now it's a more solid contact. Along with the fix the brake light probably go off a bit later due to more pedal movement is necessary but it seems still to be in an acceptable range.

1993C4LT1

Thank you sir. Been to busy this week to work on it, but believe me, I will figure it out.

1993C4LT1

For step one on the flow chart, do I just point inside of Terminal F with the test light probe? And for ground, can I use the Negative battery post?

Step 1 NO: says to disconnect TCC electrical connector. Meaning I have to drop the pan, right?
Then it says, connect test light between terminal A&D. Terminal A&D on what, the ALDL, or on the solenoid? How do you connect "between" A&D?

1993C4LT1

Just finished reading the other 3 TCC diagnostic pages. Pretty easy, it just checks the 2nd, 3rd and 4th gear switches.