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Pinpoint Test 10

PINPOINT TEST 10: NO OPERATION IN LOWER SPEEDS

Step 1 - 5:

Normal Operation
Under normal conditions, when the function selector switch is in any position except OFF, the blower motor switch completes the circuit (O/B) from the blower motor through either the blower motor resistor, or directly to ground.

Possible Causes
- circuit (B) open
- circuit (O/B) open
- circuit (Y/R) open
- circuit (LG/W) open
- blower motor resistor
- blower motor switch