DTC B1972, Low Power Control Fault: Testing
WARNING: This page is about a different car, the 1997 Cadillac Seville, 1997 Cadillac Eldorado, and 1997 Cadillac DeVille. However, it is still accessible from the selected car via links, so may be relevant.
Turn ignition switch to OFF position. Disconnect PZM connector. Remove 10-amp PZM fuse located in trunk compartment fuse block. Using DVOM, check resistance between PZM connector terminal B11 (Orange wire) and ground. If resistance is 5 ohms or less, repair short to ground in Orange wire between 10-amp PZM fuse and PZM. If resistance is greater than 5 ohms, replace PZM.