Blower motor isn't the problem, but something surely is!
My blower motor works fine when I take it out. And test in on the power source. But when it's screwed in and hooked up it catches on something.
I replaced it with a new one, but sounded like it was catching on something, and it wouldn't turn. When I got smart enough to test the old one, and found that it actually did work I put the old one back in. When turned the heater on, I heard a loud clunk noise, and upon inspection the blades had completely broke off. I checked the hole for anything like a mouse or something, but it was completely clear. It's like something is out of line.
I also noticed a small scrape where it looked as if the top of the drum had etched into the surrounding plastic.
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Was the fuse bad? Does it work on medium speed setting? If it does not work at all there is a good chance that the motor itself is bad. This is easy to test with a test light. If you clip the end of the test light to a good ground source and unplug the wire connector from the motor, you should be able to probe the 2 wires of the connector with the test light with the ignition in the "ON" position and the A/C heater control on as well, you should have power to one of the connectors. If so, your blower motor is bad, if not then you will need to look elsewhere in the circuit. Either the blower motor resistor or the control head switch, or the power source itself...but you said that you already changed the fuse. And if it is the resistor the motor will still usually work on medium. But if you have power to the switch and power is coming out of the switch but not making it to the blower motor then the only other thing it would be besides the resistor would be a bad wire or bad connection.
start by checking fuse. if fuse is good, aquire a test light, check the test light on the battery to make sure the test light works. Power to ground = light. access blower motor under pass-side dash panel.(probablly have to remove underdash cover, secured with pop-in style fasteners.) locate blower motor. 2 wires w/connector Purple-power, black-ground. check for power at purple w/test light on known good ground, with ign on, and blower switch on high. if it has power, hook clip of test light to a power source, ( + on battery w a jumper wire) and probe black wire, with test light. if no light, jumper that wire to a good ground. if it lights, you have a bad b-motor. if no light on power side of blower motor, and fuse is good, check power to swith. blower circuit may have 2 fuses. 1 for high and a 2nd for the lower speeds. if switch has power to it, and power is transfered to another wire when switched, suspect the blower motor resistor. James White, White Automotive, Hopkins Mo. ASE tech, 17 yrs exp.
Most likely either the controls are bad or the blower motor resistor.
To check you can see if the controls are getting power and if they are sending power to the blower motor. This will tell you if the controls are bad or not.
Test the blower motor, turn on the switch and then with a test light conect it something that is grounded. Check for power at the harness, then connect the test light to the power side of the battery and test for grown at the harness if you have power and and ground replace the blower.
Did you find out a solution to your problem? I have a 1996 trooper that is showing most of the same symptoms that you have. I'm curious as to your fix. Was it simply a bad ground?
Check owners manual for location of heater blower motor front,check with a test light,if it's good locate blower motor under glove box and test the two wires for power when switch is turned on,if power is present motor needs changed.if no power check blower motor resister.
Its possible that your blower motor is bad. one way to test it is to use a test light and check your power wire going to the blower, if it shows there is power going directly to the blower, then most likely, the blower is bad, but check your ground just to be sure. If there is no power going to your blower, then check your resistor. If theres no power going to the resistor, then check the plug going to the resistor and continuiously work your way to the switches, but always starting at the blower, or accessorie that isnt working, and making your way through the system until you get to the source of the electrical current.
Hope this helps.
Thanks for using FixYa. The possible causes due to which the blower is not working normally are fuse, blower resistor or a bad blower motor.Test the voltage at the blower with a test light. Please check the motor relay switch fuse under the dashboard. Use a multi meter to measure ohms for continuity. If these are fine, bypass the blower motor relay switch to make sure blower motor is running fine. Motor relay switch is right next to radiator fan relay switch under the hood. Pull out the blower motor relay switch to see 4 female pin holes. Test the relay switch using a 12 volts power source and a multi meter to measure continuity. If fan works after jumping the pin holes, then blower motor is fine but relay switch may be faulty. You may also need to replace the blower motor resistor. If still the problem persists, then you need to replace the blower motor.
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I have it mounted the only way it can go. There's a short rubber hose that has to hook to it. Any other way that wouldn't reach. :(
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