Front And Rear Blower Output 1 Short To Batt

NOTE: After making any repairs, perform BODY VERIFICATION TEST under VERIFICATION TESTS.

NOTE: If neither DTC will reset or is active, refer to the wiring diagrams to help isolate a possible intermittent condition. See AIR CONDITIONING in appropriate SYSTEM WIRING DIAGRAMS in ELECTRICAL.

Turn the ignition on. With the DRB, read the FCM DTCs. If FRONT AND REAR BLOWER OUTPUT 1 SHORT TO BATT and FRONT AND REAR BLOWER OUTPUT 2 SHORT TO BATT DTCs are set, go to the next step. If both of these DTCs are not set, replace the Front Control Module (FCM). See FRONT CONTROL MODULE under REMOVAL & INSTALLATION.
Turn the ignition off. Install a substitute relay in place of the existing Front Blower Motor Relay. See Figure. With the DRB, erase DTCs. Turn the ignition on. With the DRB, read DTCs. If these DTCs reset and the vehicle is equipped with rear blower motor go to the next step. If these DTCs reset and the vehicle is not equipped with rear blower motor, go to step 4. If these DTCs did not reset, replace the original Front Blower Motor Relay.
Turn the ignition off. Install a substitute relay in place of the existing Rear Blower Motor Relay. With the DRB, erase DTCs. Turn the ignition on. With the DRB, read DTCs. If these DTCs reset, go to then next step. If these DTCs did not reset, replace the original Rear Blower Motor Relay.
Turn the ignition off. Remove the Front Control Module from the IPM. Remove the Front Blower Motor Relay and the Rear Blower Motor Relay, if equipped, from the IPM. Turn the ignition on. Using a 12-volt test light connected to ground, probe the Front Blower Motor Relay connector cavity 85. See Figure. If the test light illuminated, replace the Intelligent Power Module (IPM). If the test light did not illuminate, replace the Front Control Module (FCM). See FRONT CONTROL MODULE under REMOVAL & INSTALLATION.