AC Blower Motor Pos+ Neg- leads which way? - PeachParts Mercedes-Benz Forum

blueriomedina · #1 10-06-2006, 05:33 AM

I had to replace the blower motor and regulator on my 95 E-320(104) the blower motor I received (without the fan cages) had no wires coming out of it my questions is which one in the motor is Pos+ (Red)and Neg-(Blue) so I can connect the wires from the regulator. Does it mater which is which on the motor?

The attach picture is for illustrations purpose the picture with the motor only is what I have right now and I need to know which wire goes to which side. Thanks

david s poole · #2 10-06-2006, 09:31 AM

i believe you will find that there are 1 male and 1 female pins on the bosch motor so it should be relatively easy.

Uncle Acky · #3 10-06-2006, 10:03 PM

You will see that David is right, they can not be mixed up.
* Remember to correctly match the fans to the new motor keeping both motors in the same position. Test air flow before sealing blower housing.

PS I'm looking for a blower regulator to disect and examine. Where abouts are you?

Acky

blueriomedina · #4 10-07-2006, 01:29 AM

I can tell you that there are no female or male leads coming out of the new motor just the blade part where I suppose the red wire and blue wire from the regulator connect to the motor that is why I was asking if it mater which goes to what, what would happen if they are backwards would it damage the motor or change the air flow/volume?
Right now I have the new regulator in place connected to the new motor but it seems that the air flow to the cabin is not what it should be and I wondering if I have the blower motor spinning the wrong way or that I put the fan cages in the wrong direction, but I was careful to mark the fan cages and the direction that they were when I took the bad/old motor out. Which way should the flow of air be, towards the cabin or away from the cabin, I am a bit confuse about this problem.

Thanks

PS. I do have the old regulator and heat dissipating plate if anyone is interested

sixto · #5 10-07-2006, 02:04 AM

Reversing the wires will spin the motor the other way causing it to suck air from the cabin, not blow less.

Unless my spatial geometry synapses are off, putting the cage upside-down on the motor won't affect how it blows. Might cause clearance problems in the blower case.

Sixto
93 300SE

blueriomedina · #6 10-08-2006, 01:30 AM

David Poole was right upon closer inspection of the motor there is a male and female connection to which I connected the corresponding wires coming from the regulator and now everything seems to be working OK with the right volume of air going into the car cabin I had the wires backwards so the motor was spinning the wrong way, the fan cages I had it the right way.

Thanks for everyone’s input and help

Oscar