Here's a weird one?

[summer]

Hey everybody. This is my moms 97 Aurora. The A/C quit working. Then I noticed the heat did also. We thought the blower motor was bad. My husband pulled the lower right blower fuse , cleaned the prongs, and reinstalled. It worked! Then it didn't work? When he pulled the fuse out 1/2 way, the blower started working? Now it doesn't work at all again. He thinks maybe to take an old thin emory/fingernail board and clean the fuse block contacts where the fuse goes in?
What do you wizards think? Is this one possessed? Have you ever heard of anything like this?

[Marc]

My guess: clean the fuse block contacts & get a new fuse. There may be corrosion on them that's causing this.

[Randy T.]

Hello summer. Is it that the fan is turning on and off when it wants to regardless of AC/HEAT position? I have a '97 Aurora and had this exact same problem, you probably have a bad blower control module. The best thing to do, if possible, is apply 12 volts to the fan and see if it works good at that point. Mine first started doing it when I was on vacation in Colorado, I stopped by a GM dealer and paid them $90 for them to tell me they did not know what was wrong. Then it was not long after I joined ACNA and someone told me what the problem probably was. Here is a link to a writeup I did on how to change it.

Blower module removal and replacement

[oldgoat]

Don't use anything that's really abrasive to clean the terminals in the fuse block. It will quickly remove the thin plating and cause the contacts to re-corrode faster. Use some 800 grit sandpaper folded to fit.

[emarkay]

For things like this, I recommend something even finer, and which does not remove the plating - a pencil eraser!

[sall]

Inserting and removing the fuse a few times is usally enough. Follow up with a thin layer of di-electric grease to prevent it happening in the future. I think your problem lies elswhere though. You can probe the fuse holder with DMM and ground to chassis to check for proper voltage.