Rod Underwood

Moving on to yet another issue in my "new" 82, the AC fan switch doesn't cause the fan to come on in any position. I have checked the fuses and checked power at the fan -under the wipers. I have power there until I turn the AC system to "off" and the power goes off. I have jumped the fan directly to 12volts and nothing happens.

Is there some other control associated with the fan that would cause it not to come on under power? The harness which attaches to the fan appears to have only power in and a ground -two connections.

If the fan motor is the problem, is this a rebuildable or replacable component without replacing a lot of other items?

Thanks
Rod

GlenL

Past the terminals on the housing the fan is just a motor. Sounds like you've done the analysis well. Time to get a new motor...or take it apart and attempt a fix.

dr bob

Make sure you are actually attaching to the fan motor leads when you test. The feed to the motor is through a resistor pack, where the various resistors provide you with the three reduced fan speeds. Th eresistor pack is a known weak point. Most "failures" seem to involve a little temperature protection scheme that puts the fan to high speed when the resistor pack gets too hot. (search the archives for 'magic blower syndrome') A second failure mode includes failure of the resistors, and that will give you the no-run condition you describe.

Rod Underwood

I just pulled it out and it had a power lead unattached. When I attached it, it ran like a trooper, but when I put in back in, no go. I pulled it out and it would work in some orientations, but not always.

I believe the fan motor has the geebies. I'll pursue that further.

Thanks
Rod

Garth S

Worn or stuck brushes .... lift the top plug, assure the impeller spins freely - and mist the motor internals with WD-40. This may clear the brushes - confirm by test running it out of the car- upside down, sideways,......
Guess that you know reinstallation is a choice moment of life ....

Silver79

When I got my 82 my blower motor did not work either. Sprayed some cleaner in it and it worked for a while, but would then only work intermittently and then not at all. I finally pulled the motor apart only to find that there were barely any brushes left. I carefully unsoldered the brushes, took what was left of them to the hardware store and matched them to a new set. Filed the new bushes to the curvature of the armature and tested it on the work bench. Worked like a champ. Installed it in the car only to find that it didn't do a thing. Pulled the cover where the wires run into the motor only to find that the power wire pulled loose. Reconnected it and has continued to run great. Hope this helps. Joe