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Old 10-20-2008, 08:32 AM   #1
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Default 2003 F150 Blower Motor

I have a 2003 F150, the settings on the blower motor switch are Lo, and Hi with two marks on the switch between the Lo and Hi settings. The only fan speeds that are working is Lo and High. When I set the switch to any of the marks between the Lo and Hi settings the fan only operates at low speed.
Is there something wrong with the switch or is there something else I should check first?
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Old 10-20-2008, 12:59 PM   #2
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Check the blow motor resistor. Do a search on blower motor resistor.
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Old 10-20-2008, 09:01 PM   #3
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+1 Torkum. THe resistor is located below the glove box on the blower motor. It is held in with 2 screws and has a quick disconnect electrical harness supplying power to it. When you take it out you will likely find it to be rusted and have one or more of the three resistors blown. There is a lot of warm moist air flowing past it which is what eventually kills it. There is a functions check in the Haynes manual you can do with an ohms meter, but the part hould only cost $28 from Ford so it may be just as easy to throw a part at it. I would recomend buying the Ford part and not from a chain store.
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Old 09-01-2011, 11:05 AM   #4
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I have a 2003 f150 and the blower just stopped working the book that I got with the truck doesnt identifiy which relay to check. any ideas
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Old 06-05-2012, 10:25 PM   #5
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Default Blower resistor location

Check out this video

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Old 06-05-2012, 10:25 PM
 
 
 
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