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Old 11-24-2011, 18:29   #1 (permalink)
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will this work

2000 Mercury Grand Marquis. Heater blower stopped working. The blower motor control module is probally bad but son does not have money to replace it. The EATC is OK. Can I go out to the blower motor and tap into the wires and run a new resistant switch into car and bypass the blower motor control module. When car is running you can turn on heat and place on defrost and you can feel warm air coming out just no blower to blow it out.
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Old 11-24-2011, 19:21   #2 (permalink)
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Re: will this work

It's not a whole lot more for a motor controller than a resistor. To bypass it, you'd have to disconnect the dark green/orange wire from the blower, connect it to ground for high, a resistor for lower speeds. If you use the wires from the controller, it may damage another part inside. I'd just get the correct part. Check Rockauto, they have good prices.
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Old 11-27-2011, 15:07   #3 (permalink)
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Re: will this work

cut the wires from the blower, ran new wire to postive + to 12 volt with fuse in between to a postive acces. so only has power when key is on. ran ground - to battery ground. we talked about a switch and son son just put in a toggle switch which will run the blower on high when ever on. Later when we have more time then order and get the switch you guys talked about. weather turning with rain and cold maybe some snow he just wanted something now that would work. after hooked everything up works great air, heat, defrost can still adjust temp control just blower on high which is ok for now. he said if he got to hot he could roll down the window or flip it off but at least he now has heat and a defroster. thanks for everything guys.
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