What are the resistance values of the blower motor resistor?

The blower motor resistor has three elements: 1.38 ohms, 0.62 ohms, and 0.33 ohms. It limits the amount of current going to the blower motor for different fan speeds.

What fuse powers the blower relay circuit?

A 40A fuse (position 105) in the Battery Junction Box, hot at all times, feeds circuit 364 BK/LG to the blower relay.

What wire colors are used for the blower motor?

The blower motor is fed by circuit 399 BN/YE through connectors C210F/C210M and C130, with circuit 261 OG/BK on the switch side and 57 BK to ground G200.

How is the blend door actuator powered and controlled?

It is powered by a 15A hot-in-run fuse in the Central Junction Box via circuit 295 LB/PK, and controlled by the blend door potentiometer (COLD/WARM) in the function selector switch through circuits 437 YE/LG, 436 RD/LG, and 438 RD/WH to the solid-state blend door actuator.

What speed positions does the blower motor switch have?

The blower motor switch in the function selector switch assembly has LO, MED LO, MED HI, and HI positions.

Home/ Registry/ Ford/ Mustang/ 2005-2014/ “SHELBY GT500”/ Photo supermotors.net/registry/media/724085

2001 Ford Manual HVAC Heater Wiring Diagram 053-001 - Blower Motor & Blend Door

Ford heater/HVAC wiring diagram 053-001 with blower motor, relay and blend door actuator

‹ ›

Automotive wiring diagram for the heater system showing the blower motor, blower relay, resistor and blend door actuator with color-coded circuits.

AI caption April 2009 · Photo 834 of 4867

This document is page 053-001, titled "Heater," a manual HVAC wiring diagram from a Ford factory wiring manual. It shows the complete heater/blower circuit: power comes from the Battery Junction Box fuse 105 (40A, hot at all times, circuit 364 BK/LG) to the blower relay in the blower/flasher relay block, and from the Central Junction Box fuses (10A and 15A, hot in run) to the function selector switch and blend door actuator circuits. The diagram traces the blower motor circuit (399 BN/YE, 261 OG/BK), the blower motor resistor with resistance values of 1.38, 0.62, and 0.33 ohms, and the blower motor switch with LO, MED LO, MED HI, and HI positions. It also covers the blend door potentiometer (COLD/WARM) inside the function selector switch assembly and the solid-state blend door actuator, with wire circuits 436 RD/LG, 437 YE/LG, and 438 RD/WH. Connectors shown include C130, C159, C191, C210, C217, C218, C219, C220, C223, C242, C243, plus splices S125, S200, S202, S203, S222 and grounds G200. Callout notes explain that the resistor limits blower current for fan speeds, the switch lets the operator control blower speed, and the actuator operates the blend door mixing warm and cool air.

Is this accurate? Sign in to help verify it.

Frequently asked questions

What are the resistance values of the blower motor resistor?: The blower motor resistor has three elements: 1.38 ohms, 0.62 ohms, and 0.33 ohms. It limits the amount of current going to the blower motor for different fan speeds.
What fuse powers the blower relay circuit?: A 40A fuse (position 105) in the Battery Junction Box, hot at all times, feeds circuit 364 BK/LG to the blower relay.
What wire colors are used for the blower motor?: The blower motor is fed by circuit 399 BN/YE through connectors C210F/C210M and C130, with circuit 261 OG/BK on the switch side and 57 BK to ground G200.
How is the blend door actuator powered and controlled?: It is powered by a 15A hot-in-run fuse in the Central Junction Box via circuit 295 LB/PK, and controlled by the blend door potentiometer (COLD/WARM) in the function selector switch through circuits 437 YE/LG, 436 RD/LG, and 438 RD/WH to the solid-state blend door actuator.
What speed positions does the blower motor switch have?: The blower motor switch in the function selector switch assembly has LO, MED LO, MED HI, and HI positions.