SOURCE: Heater fan only works on high speed 4.
sounds like the switch is bad. Test the power coming in to the connector and use jumpers to get the fan to operate at all 4 speeds. if it works then it the switch.
SOURCE: where is the heater blower motor resistor located
if you locate the blower motor the rester is the wire that atachec to blower motor fallow wire till you find a circuit bord this is ur resistor
SOURCE: locating heater blower motor resistor
the resistor is behind your glove box. open the box and push in the sides to release it and let it hang down...the resistor is right there. I didn't try to replace it, a friend did it, but the part was under $20.
SOURCE: have to change blower motor resistor where is it located
Located behind glovebox. 2 screws and 2 plugs. very simple
HEATER BLOWER MOTOR
Its
faulty blower motor resistor. The low and medium speed on blower motor is
controlled by resistor and its actual speed is high. So because resistor is not
working, blower motors actual speed which is high is working.
It
can be faulty blower motor or faulty blower motor resistor. Get the blower
motor inspected. If it's faulty it has to be replaced.
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For
blower motor testing and replacing, check the link below: ----
http://repairhelpcenter.blogspot.in/2012/02/blower-motor-replacing-for-all-vehicles.html
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These will help.
Thanks.
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