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The easiest way would be to run a wire from a 12 volt source (battery) directly into it (they normally have a two wire plug). This will let you know if it's the fan or the switch is bad.
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How do you test a resister in a blower?
To test the blower motor resistor, unplug the resistor connector. Each blower motor switch input terminal on the resistor must have continuity to the resistor output terminal, which is connected to the circuit going to the blower motor. If the blower motor resistor continuity does not check OK, replace the faulty resistor.You need a multimeter to test the resistor block and there should be continuity between all terminals.
The blower motor on your 1990 ford aerostar seems like it only works when it is on max ac how can you get it to work on the other selectionsshould you replace the blower motor or is there a wayto test?
If you are saying that the blower motor only works on the high speed setting, then the Blower Motor Resistor is defective and needs replacing.
What causes the blower fuse to instantly blow in a 99 Chevy blazer?
Short in the circuit somewhere. Try unplugging the blower motor, closing the circuit with a test lead or test light, and seeing if it blows then. If not, the problem would seem to be in the blower motor itself.
How do you determine if the heater blower switch or heater blower motor is bad on a ford 2002 crown Victoria?
You can unplug the blower motor and run a jumper wire to test the blower motor. If it is grounded through the plug you'll have to run a ground wire to it also. Blower Motor tested good. The Problem was the Blower Motor Controller which was located on the firewall just below the Heater Hoses. Thanks for responses to question.
How do you test blower motor resistor on a 1994 Toyota pick-up?
Remove and test with an ohmmeter Explain how to test with an ohmmeter?
What are possible reasons blower motor for AC on 2001 Bonneville does not work;how do you test to find out and can it be fixed at home?
Does it work only on high? If so probably bad blower motor resistor located near fan blower should be held on by two small bolts and look like a circuit board Also check the fuse, check for power to the relay
Where is the blower motor for the heater located in a 1990 Ford Thunderbird?
Blower motor is usually behind the dash on the passenger side. Try removing the glove compartment to access it. If the blower isn't working, it could also be the resistor block (more likely to burn out than the motor itself). One blown resistor could keep the blower from blowing at all. Check that first (look for scorching and test with a test light). It's a pretty easy replacement and if the blower is not getting current replacing the motor won't do you any good.
How can you check to see if the heater blower is bad on a 1999 grand prix?
You can test your heater blower motor by connecting a ground wire to the ground. Connect a power wire, from the battery to the positive post. If the blower motor turns it is working, and if it does not it is bad.
What causes the AC Heater blower fan to stop working on a 1999 cavalier?
Check the fuses.If not the fuse, test the resistor down by the blower motor.
My fan stopped working on my 2002 Toyota Echo and was curious if this would be a bad blower motor?
Yes, bad blower motor but could be just a bad resistor (blown fuse). Maybe both need to be replaced. You can test the motor by jumping it.
On a 1990 Chevy astro how do you check the blower motor to see if it is bad?
The most conclusive test of a blower motor is to run a wire from the battery directly to the motor, being careful not to ground the wire out anywhere by accident. If the motor will not run when wired directly to the battery, it is probably bad.
How do you repair the heater in a 1995 Grand AM when the blower is no longer working?
Test the resistor bank before getting into anything else. These are the speeed controls for the blower motor.
