Where does the power transistor go in a blower motor?
The power transistor has 4 wires: two come from the climate control system control unit, one is the ground, one goes to the negative terminal of the blower motor. The service manual advises measuring the voltage at the blower motor, then if not OK, at the power transistor and so on.
What are the symptoms of a failed blower motor resistor?
Blower motor resistor problems. Problems with a blower motor resistor are common in many cars. The most common symptom of a failed blower motor resistor is when the heater fan only runs at high speed and doesn’t work at low speeds.
How to test Honda Accord blower motor resistor?
Testing Honda power transistor (blower motor control module). For example, in the 2009 Honda Accord, the service manual describes the procedure as follows: Turn the ignition to ON. Press and hold the OFF button and within 10 seconds press and release the Window Defogger button five times.
Where does the ground go in a Honda blower motor?
The blower motor control module (Honda calls it Power Transistor) supplies the ground. The power transistor has 4 wires: two come from the climate control system control unit, one is the ground, one goes to the negative terminal of the blower motor.
The power transistor has 4 wires: two come from the climate control system control unit, one is the ground, one goes to the negative terminal of the blower motor. The service manual advises measuring the voltage at the blower motor, then if not OK, at the power transistor and so on.
Blower motor resistor problems. Problems with a blower motor resistor are common in many cars. The most common symptom of a failed blower motor resistor is when the heater fan only runs at high speed and doesn’t work at low speeds.
How much does it cost to replace a blower motor resistor?
The blower motor resistor or control module replacement is not very expensive. For example, one of our colleagues had a problem with his 2011 Ford Escape: the fan only worked at the speed 4. He paid $50 to diagnose and $112 to replace the resistor at a local Ford dealership.
How is the speed of the blower motor controlled?
The electronic module that controls the speed of the blower motor is called a blower motor control module. In some cars, the blower motor has only 4 or 5 fixed speeds. In this case, the speed of the blower motor is controlled by a blower motor resistor.
What should the resistance of a blower motor resistor be?
For example, in this photo we measured the resistance of this blower motor resistor. According to the service manual, it must be around 4-5 ohms. In our case the ohmmeter shows open circuit, which means the resistor has failed. Sometimes, a blower motor resistor might fail due to problems with the blower motor itself.
Where is the blower motor resistor located on a Ford Escape?
In the 2008-2011 Ford Escape, the resistor is located behind the glove box on top of the HVAC unit air duct. It’s held by two screws and is easy to replace. See the photo. In the 2008-2011 Ford F150 the blower motor resistor is also located behind the glove box, but is installed in the right side of the plastic air duct.
Can a blower motor go out and smoke a resistor?
A blower motor that is going out can smoke a resistor. I lost #5 (no melting, relay in resistor crapped out) and after replacing the resistor the motor clamped at 23A and some change. I replaced the motor just to be on the safe side and it was right around 22A.
Where is the blower motor resistor wire harness located?
Find the blower motor resistor. Typically, it’s located inside the vehicle, on the passenger side, and underneath the dashboard by the climate control unit. Locate the lock on the blower motor resistor wire harness connector and unlock the connector latch. Depress the latch and separate the connector from the resistor.
When to replace the blower motor power transistor?
If the resistance IS NOT within specification, we can conclude your Honda Civic’s blower motor power transistor is bad and needs to replaced. Now, if the resistance is within specification, then we need to continue on to the next test (which is testing the power transistor diode).
What causes a blower motor resistor to melt?
Arching is what’s melting the connector. when you put the connectors together it may be a good idea to take a scratch awl or pick and squeeze the spade connectors in the plug tighter. You must log in or register to reply here.
A blower motor that is going out can smoke a resistor. I lost #5 (no melting, relay in resistor crapped out) and after replacing the resistor the motor clamped at 23A and some change. I replaced the motor just to be on the safe side and it was right around 22A.