Blower motor quit
Help. Blower motor in my 2011 fusion quit. I have
14v at the two pin connector to the motor when it’s
unplugged with the car running and the fan on high
from the resistor.
When I plug the connector in it drops to 0v.
All the connectors and wires are pristine. Resistor
connections dont look burnt in any way. Wiggling
connectors and wires does nothing. Hooked up
12v motorcycle battery directly to the motor to
check. Blower Motor comes on and runs perfectly.
Is this a resistor issue? Or a blower control issue?
Or do I need to check something else to verify.
Can’t figure out why I’m getting good voltage
unplugged but none plugged in.
Also switched the relay with the rear defrost relay, that I know works.
Don't know if this will help? Hi speed doesn't use a resistor. In the diagram, top wire at blower motor is voltage, the bottom wire is ground. When testing voltage at top wire use chassis ground not the other wire. Did you check relay circuits for voltage and ground, at the relay terminals 30 and 87 are switch side of relay, terminal 30 fuse protected and hot all the time. The control side of relay, terminals 85 and 86, needs voltage and ground.
I have 12v at 30 / 12v at 86 with fan on / ground at 85 and I verified in the garage that the switch is functioning. Wires to motor check out. 14v until I plug the connector in. Then 0v
10 amp in position 15 and 5 amp in position 45 are good. 40 amp and 60 amp in power box are good. Everything I check looks good.
If you unplug relay, Use jumper between 30 and 87, blower motor should run as long as blower motor and motor ground is good. You could use a redundant ground and bypass the resistor and speed control, to see if blower motor will run? Leave the connector plugged in. Something going on that I don't understand?
Ok. Lost a ground somewhere. Jumped the hot on the two pin. And picked up a ground from a support inside dash and blower kicked on high. Now I have to find it. Thank you. That was a tuffy. Spent all day scratching my head.
Could that still be the resistor? Is the resistor ground the same as the blower ground?
Hooked up temporary ground to blower motor and it has no control. Only on high all the time. I’m assuming the resistor is bad.
How'd you ever make out?
