Turn the ignition OFF when installing or removing the control module connectors and disconnecting or reconnecting the power to the control module (battery cable, powertrain control module (PCM)/
Engine Control Module (ECM)/transaxle control module (TCM) pigtail, control module fuse, jumper cables, etc.) to prevent internal control module damage. Control module damage may result when the metal case contacts the battery voltage. DO NOT contact the control module metal case with battery voltage when servicing a control module, using battery booster cables, or when charging the vehicle battery.