2006 Freightliner Columbia - dash blower motor not working

two things

one, the motors are interchangeable, i prefer the rear over the front (it has already happened to me)

two, my front fan takes a break in the middle of the day, for about an hour, then comes back on

gremlins maybe? anyway, freightliner wants an arm and a leg to figure it out
i have learned to live with it

 

Make sure your switch is good. They go out.

 

You have heard of test lights and meters, get one and check the power at the dead motor..

If power, then motor is dead..

If not, look upstream..

... Philip

 

The problem is going to be either the control switch assy, the harness from the switch to the motor, or the motor itself.

 

wait a minute! Behr switched to brushless motors in 2005 so u can have brushless motor with mounted on it ESC, and u may have bad circuit on board if bearings are old and motor consumps too much current

 

That year and thru 2010 is notorious for wires shrinking. Our whole fleet pulled right out of fuse box on fender over time. Check for power right at blower motor.

 

I've got a 2005 Freightliner M2 Buiseness the blower motor was not work when I bought the truck so I've replaced the Motor with new stall wiring harness I'm getting power to the motor the volts go up and down with the switch so the control can't be bad what now

 

You have confirmed power in, now fix the ground...

... Philip