What steps should I take to repair the transmission when I'm getting the P0743 fault code? Specifically, is the issue related to the torque converter clutch circuit electrical system?
Mr. Compton, if you have a wiring diagram for the 1999 Cadillac Catera, please share it here. This could be helpful to others facing similar issues. Unfortunately, I'm unable to attach files due to an error: 'Sorry, the board attachment quota has been reached.'
I do not post wiring diagrams directly. However, you can purchase official diagrams from your local auto parts store or check with a professional mechanic.
Alternatively, you might find reliable wiring diagrams at your local public library or through online automotive repair databases.
Start with a wiring diagram and use a digital volt-ohmmeter (DVOM) to check the circuit. The clutch solenoid itself could be faulty. I recommend consulting a professional transmission repair shop or contacting your local Cadillac dealership for accurate diagnosis and repair.