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Re: does not blow when heater is on? blower motor
First check fuse panel for burned fuse, if all o.k., Take a look up under passenger side dash, it's usually a common spot.When you find it, locate wires going into it & probe with 12vdc test light for power with key on & fan in run position. If light comes on by probing one of the wires, your fan motor is shot, if nothing at either wire, start back tracking for relay & switch malfunction.
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Might be the Resistor pack located close to the blower. Could be under the dash or under the hood, but always close to the blower itself. Usually has a flat connector with 4 or 5 wires, and two small screws holding in the duct. It may be a crispy critter. It happens... The blower moves air across it to keep it cool. The blower motor may be bad as well, or possibly the fan speed switch. May very well be the fuse for the blower as well. The blower connector may be loose. Let me know what you find.
The blowers ion the back have there own blower motor. The front has it's own. The resister controls the range the blower motor runs on,( low, medium, high). If the blower motor is not working it may be the motor itself. Was the fuse checked:?
Check the blower motor fuse to see if it is blown,and look for a blower motor relay,and check it to see if it is good.Then if you must,run a hot wire from a 12 volt power source to see if the blower will run,if not .or if it runs slow ,replace it.If the fan runs good,look at the blower control switch to be bad,replace it.
Check your owners manual,and locate the fuse for the front blower motor.Pull the fuse and see if it is blown, If not check for power (+12 v )and ground at the motor plug-in located close to the blower motor.
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Check your fuses.If you have a test light, unplug the blower motor, start the car, turn the fan on, if you have power to the blower plug, the blower motor is bad. If no power, if it's not a fuse, check the blower motor resistor. Should be mounted right next to the blower motor. It is inserted into the evaporator box
This is 100% the Blower Motor Resistor, located adjacent to the Blower Motor. This is a common problem with Dodge. I had to replace my own and several dozen others on Chyrsler's, Dodge's, Plymouth and Jeep.
Make sure you disconnect the Battery and wait for 2-minutes to discharge the Air Bag System. Remove your Passenger Side - Dash -Glove Box for easier access.