QuestionQUESTION: Hi Kevin, I have a 2000 T&C ltd awd in which the rear blower is inoperative. I have confirmed that the blower motor itself works by using a power probe and also grounding the black/brown wire that comes out of the rear a/c harness(next to pass. tail light). Is the power circuit for the rear blower grounded by a relay? If so, do you happen to know which one? Obviously if I just ground the black/brown wire the fan runs constantly, regardless of switch positions. If it's not the relay, do you have any idea as to where the issue could be?
Thanks in advance,
Justin
ANSWER: the rear blower has a blower motor resistor just like the front ones does.I live in the Atlanta area I would be glad to look at it for u.
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QUESTION: Hi Kevin,
Thanks for the answer, but I don't think we're on the same page... If the blower motor works by supplying power directly to it, the resistor shouldn't be bad, correct? I have physically removed the blower from the van, applied power via a power probe and the blower works. I even bought a second motor from a junkyard that worked in the donor vehicle. Same thing, when power is applied outside the vehicle it works fine. When you plug in the motor to the harness though; the fan doesn't work. It's my understanding that the resistor is not a separate unit on these blowers and is not serviceable. While the blower is in the car, plugged in to it's harness, I can ground the brown/black wire to the body of the car and get the motor to work, but with no ability to shut it off.... This is why I'm trying to figure out what actually grounds the circuit, a relay or just a body ground somewhere on the vehicle. Thanks for the help, Justin.
AnswerI am on the correct page.
The blower motor resistor is the path to which goes to ground.
Simple terms the 12 volts go through the blower motor and then goes to the resistor and which ever speed setting the switch is set on the resistor supplies the path to the ground which is in the switch.
