Where is the resistor for heater motor on a ford E-250 van?

There isn't a single, dedicated resistor for a Ford E-250 van's heater motor in the same way some vehicles have a resistor pack for controlling blower speed. The speed control for the heater blower motor is typically handled by a module, often called a blower motor control module (BMMC) or a similar designation. This module uses transistors or other semiconductor devices to control the power to the motor, rather than resistors.

The BMMC itself is usually located within the dashboard, often behind or near the HVAC controls. It's not easily accessible and often requires partial disassembly of the dashboard to reach it. It might be mounted directly to the HVAC housing or secured nearby.

To find it, you'll likely need to consult a wiring diagram specific to your van's year and model. This diagram will show the location of the BMMC and its connection to the heater blower motor. You can often find these diagrams online through repair manuals or forums dedicated to Ford E-250 vans. Searching for "[Your Year] Ford E-250 blower motor wiring diagram" should yield results.

Important Note: Working on the vehicle's electrical system can be dangerous. If you're not comfortable working with automotive electrical systems, it's best to consult a qualified mechanic.