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DISCUSSION => Electrical => Topic started by: Jorgeconrico on May 21, 2010, 06:46:00 AM

Title: Blower only works on high speed
Post by: Jorgeconrico on May 21, 2010, 06:46:00 AM

Like the title states my blower only works on high. The motor is fine obviously, and the resistor tested fine as well. I'm thinking it could be the blower switch. Is there anyway to test this? If it's in the bentley I must have missed it. Any help would be appreciated. Thanks

Title: Blower only works on high speed
Post by: DesktopDave on May 21, 2010, 07:34:15 AM

I think you just do continuity tests on the switch blades.  That really does sound like the resistor though.

I'm going to get that wiper motor & relay out to you today too.

Title: Blower only works on high speed
Post by: Jorgeconrico on May 21, 2010, 08:25:10 AM

I took out the resistor and the Ohms matched what the bentley manual stated they should be. None of the springs were popped either. I know one of the main symptoms of a bad resistor is when the motor only works on high. Could it still be bad?? Does anyone know where I could get one for cheap. They are like 30-40 bucks.

Thanks for getting the wiper motor/relay mailed Dave.

Title: Blower only works on high speed
Post by: DesktopDave on May 21, 2010, 09:48:00 AM

The ohm test is conclusive.  Like you said, if the resistor pack is bad it will be pretty obvious - those coils will be visibly burned out.  I don't think that the fan motor runs on two circuits either.  I'd suspect the switch just like you do.  I can drop some spares in with your wiper set.  Just mail them back once you solve the problem.

You know, there is an odd little safety switch on pg 522 of the Bentley.  I figured it was a straight through contact from fan speed 4 on the switch to the blower motor.  Hmmm.  I'll see if I can dig anything up about that.

Title: Blower only works on high speed
Post by: Jorgeconrico on May 21, 2010, 10:36:52 AM

Yeah if you could send some along with the wiper motor that would be awesome. I'll send them back, but if thats the problem i'll send you cash via paypal. Your the man Dave. Thanks

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