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This could be the fuse check the fuse panel. This could be the resistor in the heater plenum behind the glovebox, it could also be the heater fan motor. The easiest thing to check is the fuse, then use a volt meter on the heater fan motor and if you have voltage there, it is the motor. If not it is most likely the resistor.
There is a relay that powers the blower motor circuit . Left I/P fuse box , do you know where that is ? The relay is IGN 3 relay .
Fuse Block- I/P - Left
LF of the passenger compartment, behind the kick panel
IGN 3 RELAY
--
IGN3, HVAC CNTRL MODULE
IGN 3
10A
HVAC CNTRL MODULE, TC SW., HTD SEAT SW.
Does your car have Manual or automatic climate control ?
? 2:29
https://www.youtube.com/watch?v=4edK8fa-Ypg
Mar 9, 2011 - Uploaded by Scotty Kilmer
Scotty Kilmer, mechanic for the last 46 years, shows how you can replace a broken blower motor in your car ...
? 13:19
https://www.youtube.com/watch?v=2p5QYd58sTk
Jun 12, 2012 - Uploaded by talyn875
Do not try this at home. For HVAC professional use only. This video shows yours truly changing a blower motor ...
check that the wires for the motor are on correctly and that the loom has not jammed and cut when replacing the motor. There is a dead short in the wires after re-assembly of the system
Check the heater control switch,,,,,and the number of wires at the heater motor....Some motors have more than one winding...in which case there will be three or more wires going into motor..there can be burnout in those windings and will require a new motor....check the plug which attaches to the motor....can be bad connection...or at the switch.....but if there is only two wires....then the heater switch uses resistors to slow down the different speeds...and direct connection for high speed....and the problem is definitely the switch...
You have a problem with the resistors on your blower motor. 95% of AC/Heater blower motors are located under the glove box in the passanger foot well. When you remove the motor you should see a resistor plate. Resistors are not servicable and will need to be replaced. This is a relatively cheap part, that you can replace yourself if your handy, if not take it to your local tech.
working on 4 and 5 speed that the resistor that broken cold air you got to move the selector to see the motor that move the trap hot and cold sometime when the motor was not move to the hot side for a long time its jam the motor on the passager side under dash put to hot and gently tap the motor tanks pierre
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