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Re: Interior A/C fan- no high speed
BLOWER MOTOR HIGH POSITION INOPERATIVE
1. Perform blower controls system check before diagnosing blower motor operation. See BLOWER CONTROLS SYSTEM CHECK. If system check was performed, go to next step.
2. Disconnect blower motor control module connector C 1. Use DVOM to check voltage between ground and blower motor control module connector terminal "F" (Orange wire). Turn ignition switch to ON position. Rotate mode control knob to vent position. Rotate blower control knob to high (No.5) position. If battery voltage exists, go to step 4 . If battery voltage does not exist, go to next step.
3. Turn ignition switch to OFF position. Disconnect HV AC control head connector C2. Check for continuity in Orange wire between terminal "C" of HV AC control head harness connector and blower motor control module connector terminal "F". If continuity exists, replace HV AC control head. Perform blower controls system check. If continuity does not exist, repair open or high resistance in Orange wire between blower motor control module and HV AC control head connector. Perform blower controls system check. See BLOWER CONTROLS SYSTEM CHECK.
4. Measure voltage between ground and terminal "G" (Red wire) of blower motor module harness connector. If battery voltage exists, replace blower motor control module. If battery voltage does not exist, repair open or high resistance in Red wire between blower motor control module and fuse 51 (30¬amp) of instrument panel electrical center (fuse box). Perform blower controls system check.
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