Test P: No Operation On Lower Speeds - Manual Climate Control

PINPOINT TEST P: NO OPERATION ON LOWER SPEEDS - MANUAL CLIMATE CONTROL

P1:

P1-P3:

P4-P6:

Normal Operation
Under normal operation, the blower motor is provided a ground from the blower resistor through circuit 261 (OG/BK). The resistor gets a ground from circuit 57 (BK) in the lowest blower setting. In MED-LO and MED-HI the resistor gets a ground through circuit 754 (LG/WH) or 752 (YE/RD), depending on selected speed. The blower switch receives its ground from circuit 57 (BK).

Possible Causes
- An open in circuits 57 (BK), 261 (OG/BK), 752 (YE/RD) or 754 (LG/WH)
- Blower motor resistor
- Blower motor switch