moxieman2

Hello All, I've been chasing down an intermittent blower issue on my '83 300SD for some time now. I have verified the following:

1. There is power on both sides of the #11 Blue fuse in the fuse box.

2. There is power at port #12 going into the blower motor regulator.

3. There is NO power at the blower motor plug itself.

I have tested the blower motor regulator with a reman unit, and still get no power to the blower.

When pushing the different buttons on the CCU, I can hear the system adjust to the different settings. ANY ideas or suggestions would be greatly appreciated! Thank you.

moxieman2

Update:

I have located the blower motor resistor, under the master cylinder. There was some debris around the unit. I have cleaned all the debris, and inspected the coils (as well as you can in this location), and all looks to be in good shape.

Does anyone have ANY theories? Ready to put it in the shop...

hassel154

Take the blower motor out and test it. Check to see if it's good. I have to replace my switch behind the key in the dash.