Diesel Data: Automotive Repair

Blower Motor Inoperative (MTC)

Test 1 - Test 3:




Test 4 - Test 7:




Test 8:






SYMPTOM
BLOWER MOTOR INOPERATIVE - MTC

POSSIBLE CAUSES
- Junction block fuse #1
- Fused ignition switch output (RUN) circuit shorted to ground
- Blower motor shorted to ground
- Blower motor driver problem
- Ground circuit open
- A/C - heater control open
- Blower motor driver circuit open
- Fused ignition switch output (RUN) circuit open
- Blower motor open