Operation CHARM: Car repair manuals for everyone.

Rear Blower Motor Speeds Incorrect

Test 1 - 3:




Test 4 - 7:




Test 8 - 9:






SYMPTOM
REAR BLOWER MOTOR SPEEDS INCORRECT

POSSIBLE CAUSES
- Rear blower speed circuit(s) shorted to ground
- Rear blower speed CKT(s) shorted to rear blower control feed CKT
- Rear A/C - Heater control
- A/C - Heater control module
- Rear blower speed circuit(s) shorted to voltage
- Rear blower speed circuits shorted together
- Rear A/C - Heater control
- A/C - Heater control module- Speeds incorrect
- Rear blower speed circuit(s) open
- Rear blower motor resistor block - Open speed