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Hello all. New to the forum, and Corvettes. I am tryingto check for error codes using the ALDL.
My understanding was to jump the A terminal (top far right terminal) to the B terminal ( 1st port to the left of the A port) turn the key to the on position without starting the car and the check engine light should flash. thus providing an error code depending upon how many flashes with pauses.
*** UPDATE *** replaced the bulb and now I have the codes I was looking for thanks everyone.
when I jump the A terminal to the B terminal my cooling fan comes on but no check engine light.
Do I need to check all of the wiring on this car ?
Last edited by ddarcy410; Feb 14, 2025 at 03:03 PM.
Found this little gem in a thrift store for $2.00. It's just a glorified paper clip but it's probably easier to insert blind. Guess I'll know later as I have not used it yet.
I have an '84 so no use for the ABS switch.
The third pin is for ABS i'm guessing. Probably blank on my ALDL socket.
I just acquired a 1985 Chevy Corvette.
I hadn't noticed the Service Engine soon / Check engine light. as one other user suggested possibly the bulb is out.
I will carefully replace the bulb and recheck. good to know that jumping A & B will turn the cooling fans on and it is not a crossed wire.
Got a loit of learning to do. will be ordering a shop manual shortly which should assist some.
Error Codes from ALDL
