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If you can hit on the blower motor housing and the motor starts, your brushes on the motor are bad and the blower motor needs to be replaced. Used tested unit $30.00 at a junkyard. New rebuild $54.00.
Many posts have stated that the dash must be removed to replace the blower motor. It can be done without removing the dash. I know as I replaced the blower motor on my kids 99 Durango last night but it took about 4 hours. Now that I know how to do it, it would estimate 2 hours.
Remove glove box by opening glove box all the way. Press inward on the both sides of the glove box to allow the rubber stops to clear the catches and lower the box The two outer hinges (plastic) will come off by slightly twisting the glove box upward leaving only the center hinge (plastic) in place. Reach in and push down on the hinge to pull out glove box. Set aside.
Remove side trim panel by pulling back carpet and remove one Phillips screw. Remove panel by pulling back on upper portion to remove clip from frame, then slide forward to remove from lower plastic trim.
Use 1/4" nut driver or socket to remove two screws holding vacuum canister on lower right side of blower shroud. Remove two vacuum hoses noting which hose goes to which side of the vacuum canister (both were green in color on my Durango). Disconnect connecting rod from vacuum canister to vent control by removing lock washer (you may be able to get away with not removing the rod, but the plastic "fin" may break if you stress it while removing the blower shroud.
Use 5/16 nut drivers/sockets with extensions to remove the blower shroud hex bolts. The hex bolts are located in several areas around the shroud (use your finger to follow shroud edges to locate all 8). Some of the hex bolts are very tricky and may require odd positioning of your body to locate and remove them.. I also put several extensions to use in order to reach the various hex bolts. Once the hex bolts are removed, pull the plastic blower shroud down exposing the blower motor squirrel cage.
Remove two of three hex nuts holding blower motor in place. Loosen the third one and the blower motor should come free. I was not able to remove the squirrel cage from the old motor so I broke the squirrel cage allowing me to expose the wire harness and grommet that went through the back of the shroud.
Feeding the wire harness back through the assembled wall appeared to be a real challenge, so I cut the green and black wires at the motor for splicing into the new motor later. Remove the motor and broken squirrel cage and throw the dam thing away.
Remove squirrel cage from new motor by removing retention clip with a pliers. Pull off the squirrel cage carefully by applying WD40 (or other lubricant) to the shaft. You may have to place two large screw drivers or other pry bars underneath the squirrel cage equally across the underside of the squirrel cage slowly prying up the cage. I accomplished this with a helper to hold the motor in place to allow equal pressure from both pry bars.
Cut green and black wires on new motor leaving enough wire to work in the tight area of the motor housing. Strip wires from old harness and new motor and apply **** splices for green to green and black to black. Add electrical tape for extra mechanical strength and insulation.
Place new motor into housing and secure the three mounting hex nuts. Turn on key and run blower to make sure it works. Install squirrel cage and retaining clip on motor shaft. Run again to make sure it works.
Install the balance of the items in the reverse order you removed them.
Now on to replace the rear wiper motor on the same Durango. Junkyard parts $54.00. Time: Unknown?
no you don`t need to disconnect the battery to work on the blower motor.just remove the motor and check the condition of the squirrel cage(not damaged) and check inside the air box for debris and clean out.make sure the noise is not the blower motor itself.
Most GM vehicles have little flaps or doors to redirect the air near the blower motor. If that gets out of place or falls down it will rub on the squirrel cage of the blower fan. Some older cars have insulation in that area that might come loose and rub on the squirrel cage. The insulation sometimes is covered with a stiff paper. Cutting away the stiff paper with allow more clearance.
HI.The blower fan or squirrel cage is rotated by the blower motor shaft, thus, forcing air through the heater core or A/C evaporator core and into the passenger compartment. it is housed in the blower compartment shroud. If the motor shaft becomes unstable, this will cause the cage, or blower wheel, to rub against the shroud, or housing. This will cause the noise you are hearing. The shaft screw may be loose, or the shaft, itself, may be faulty as well.
In most cases, replacing the blower wheel will correct this issue.It would be wise to inspect the blower housing for any loose mounting screws before replacing the wheel.
YOU NEED TO TURN OFF RADIO TO KEEP FROM LOSING RADIO CODE.REMOVE NEGATIVE BATTERY CABLE.THAT WILL DISABLE AIR BAGS.WAIT 30 MINUTES.SO THE AIR BAGS CAN DISCHARGE.THE BLOWER MOTOR IS LOCATED ON THE PASSENGER SIDE OF VECHICLE UNDER THE INSTRUMENT PANEL.WHEN REPLACING THE BLOWER MOTOR.YOU HAVE TO REMOVE THE SQUIRREL CAGE OR BLOWER MOTOR FAN.BY REMOVING THE METAL STAR CLIP RETAINING THE FAN CAGE TO THE MOTOR SHAFT.REMOVE THE FAN BY PULLING STRAIGHT OUT.TO INSTALL BLOWER FAN TO NEW BLOWER MOTOR.INSTALL THE FAN CAGE ONTO THE MOTOR SHAFT .ADJUST THE FAN CAGE TO GET A CLEARANCE OF 0.30 INCH TO THE MOTOR MOUNT PLATE.INSTALL EVERYTHING VISA VERSA.BESURE TO BUY A REPAIR MANUAL.SO IT CAN SHOW YOU WHERE ALL YOUR PARTS AND SCREWS ARE LOCATED. WARNING IF YOU HAVE ANY DOUBT ABOUT THIS TASK.LET THE DEALERSHIP DO IT.
most likely the blower motor squirrel cage hit the fan housing or the motor has a damaged bearing from the impact, the noise is coming from the fan which is on the passenger side, pull the fan assembly out and see if the blower cage is damaged, if it spins true then replace the blower motor, not a very hard job.