Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSFORD2004EXPLORER 2WD V6-4.0L VIN EREPAIR AND DIAGNOSISHEATING AND AIR CONDITIONINGTESTING AND INSPECTIONPINPOINT TESTSTEST T
2004 Ford Explorer 2WD V6-4.0L VIN E
Test T
2004 Ford Explorer 2WD V6-4.0L VIN ESECTION Test T
PINPOINT TEST T: THE AUXILIARY BLOWER MOTOR DOES NOT OPERATE CORRECTLY USING THE REAR AUXILIARY CLIMATE CONTROLS
Normal Operation
Under normal operation, the blower motor is provided a ground from the resistor through circuit 515 (OG/RD). The resistor gets a ground from the rear auxiliary blower switch, depending on selected speed, through circuit 261 (OG/BK), 269 (LB/OG) or circuit 260 (RD/OG). In the HI blower selection, the switch provides ground directly to the motor through circuit 515 (OG/RD). The rear auxiliary blower switch is provided ground from the front auxiliary blower switch, through circuit 1121 (DG/YE), when the REAR position is selected.
Possible Causes
- An open, short to ground or together in circuits 515 (OG/RD), 261 (OG/BK), 269 (LB/OG), 260 (RD/OG) or 1121 (DG/YE).
- Front auxiliary climate control assembly.
- Rear auxiliary climate control assembly.
Test T1:
Test T1-T3:
Test T3 Continued:
Test T4:
Normal Operation
Under normal operation, the blower motor is provided a ground from the resistor through circuit 515 (OG/RD). The resistor gets a ground from the rear auxiliary blower switch, depending on selected speed, through circuit 261 (OG/BK), 269 (LB/OG) or circuit 260 (RD/OG). In the HI blower selection, the switch provides ground directly to the motor through circuit 515 (OG/RD). The rear auxiliary blower switch is provided ground from the front auxiliary blower switch, through circuit 1121 (DG/YE), when the REAR position is selected.
Possible Causes
- An open, short to ground or together in circuits 515 (OG/RD), 261 (OG/BK), 269 (LB/OG), 260 (RD/OG) or 1121 (DG/YE).
- Front auxiliary climate control assembly.
- Rear auxiliary climate control assembly.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.