Question about Cars & Trucks
NEED A BLOWER MOTOR RESISTOR ITS SHORTED OUT UNDER P/S FLOOR BOARD THERE WILL BE A MOLLEX PLUG SQUARE UN PLUG SHOULD BE TWO 7MM BOLTS AND WHEN YOU PULL IT OUT SHOULD LOOK LIKE A BUNCH OF ELECTRIC COILS REOLACE THAT THERE ABOUT 10 15 $
Posted on Dec 04, 2014
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Posted on Jan 02, 2017
SOURCE: I have an 1997 Ford
If the blower motor fan runs only on high speed then the problem is resistor.Replacing resistor solves the problem.Because resistor is the part which control blower motor fan speed,that is low,normal and high.If the resistor gets faulty the motor will only work on high.But in your case the blower motor is running the fan on low speed in this case there are two possibilities,
1)Either the switch is faulty.But you have already replaced the switch.
2) The other possibility is faulty blower motor itself.The motor is got weak,in the motor there are copper coils,this coils gets burnt out slowly ---- slowly and motor gets weak and runs slow.So the motor needs replacing.
----------- Also you mentioned that blower fan got burned out,so this can be indication that motor is getting overheated,because its got weak and this burned the fan,this fan can burn again if motor not replaced.Also you can try this remove the motor and clean the motor connections,if they gets dirty and corroded then it can not let the motor to control the fan as required.So try cleaning the blower motor connections and then see if the fan is getting operated on all required speeds if not then motor needs replacing.This blower motor is a 12 volt part.You can measure the voltage to the blower motor switch and motor itself,to see if you are getting required voltage.If not then motor needs replacement.------------------ This will help.Thanks.Helpmech.
Posted on Jan 30, 2011
You will need to inspect and test the speed control resister and the speed control knob first. What have you done so far?
Posted on Apr 22, 2010
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