Blower Motor Resistor: Testing and Inspection

Fig. 10 IRCM Pin Location:

Diagnosis of blower speed requires a digital volt-ohmmeter. Refer to Fig. 10 for IRCM pin location.

Fig. 11 Blower Speed Controler Diagnosis - No Blower:

1. No blower, ignition in run position. Refer to Fig. 11.

Fig. 12 Blower Speed Controler Diagnosis - High Blower Only:

2. High blower only, blower switch in low position. Refer to Fig. 12.

Fig. 13 Blower Speed Controler Diagnosis - No Variation With Blower Switch:

3. Blower operates, no variation with blower control switch. Refer to Fig. 13.

Fig. 14 Blower Speed Controler Diagnosis - CELO Inoperative:

4. Cold engine lockout inoperative. Refer to Fig. 14.