How to test an automotive blower fan motor?
Blower Fan Works on High Only 1 Locate the Resistor The location of this resistor is usually near the blower motor itself which cools the unit when it’s in operation. 2 Test the Resistor Use a grounded test light and locate the outgoing wire from the resistor to the blower motor (usually orange or red). 3 Replace the Resistor
Where does the power go in a blower motor?
For each higher speed, power flows through one less resistor. Some car makers run blower motor power through the fan speed switch first, then through the blower motor resistor and then to the blower motor and ground. Other car makers reverse that and run power to the blower motor first and terminate ground at the blower fan speed switch.
Why is my blower fan motor not working?
As the blower motor ages the amperage that it takes to run the motor increases that overloads the electrical system which can cause additional problems. This is due to normal bearing and brush wear that occurs in all motors of this type.
What to do if your car AC is not blowing?
Depending on what kind of car you have, it should be a pretty simple fix. The problem sounds like it is with your blower motor, not your AC system. Hopefully, the blower motor simply blew a fuse. Find your fuse panel and check the fuse for the “blower motor” or “vent fan” or something like that.
What’s the best way to test a blower motor?
The way we’re going to test the blower motor is by manually applying battery power and Ground with jumper wires or a power probe. NOTE: If you use a jumper wire, make your own fused jumper wire to apply battery power to the blower motor (as a safety precaution against shorting the jumper wire to ground).
How can I test my AC fan motor?
To test the fan motor on your air conditioner, you’ll have to do a continuity test. Click here for a video tutorial. Before you start, make sure the thermostat is set to cool and that the temperature setting is as low as it will go. Step 1. Check the power
When do you Know Your blower motor is going bad?
This is one of the first signs of a bad blower motor that people tend to notice. Your motor will wear out over time—this is just part of the general wear and tear your vehicle experiences.
Where is the number 1 on a blower motor?
Disconnect the blower motor from its two-wire electrical harness connector. Connect one end of the fused jumper wire to the blower motor male spade terminal labeled with the number 1 (in the illustration). This is the terminal that connects to the BRN/YEL wire of the connector.