Pinpoint Test 9
PINPOINT TEST 9: NO OPERATION IN HIGH BLOWER SETTINGStep 1 - 3:
Normal Operation
Under normal conditions, when the blower motor switch is placed in low, M1, or M2 positions and the function selector switch is in any position except OFF, the blower motor switch completes the circuit (O/B) from the blower motor through the blower motor resistor, and to ground. The current flows through 1 to 3 resistors, depending on the selected blower motor speed.
Possible Causes
- blower motor resistor
- circuit (O/B) short to ground
- blower motor switch