Cadillac Repair Questions? Ask a Mechanic for Answers ASAP
Good evening, With the key off and removed from the tumbler, check the resistance between pins 6 and 14 of the DLC. The reading should be 60 ohms +/- 5%. If the resistance OK, disconnect one battery cable. Rub that cable end on the other. Reconnect the battery. Attempt to start the engine. If there still is no communication with the BCM, replace it. Programming is required after installation.