For some apparent reason or no good reason my blower fan keeps running. No preceding event. I have to unblug the fan (on the firewall) each time I stop for more than a few minutes (to keep the battery from draining). Any Ideas? Relay? Short in wiring (most likely place)? Etc.?

Thanks

Please Put your year and model in your sig before we can even try and troubleshoot

Faulty Blower Control Module if equipped with electronic climate control.

Sorry, 1994 SSE with electronic climate control.

Tell me about the control module. Please don't say int is up under the dash.

No, fortunately it'* under the hood. It'* located under the Maxifuse/relay center that is more towards the passenger'* side. If you have difficulty finding it, you can trace the wire loom from the blower motor right to it. This is a solid state electronic part and can fail just the way you describe. Before you replace it though, you should check the voltage on the control wire (gray I think) to make sure it'* 0 volts. This will verify that it is indeed the BCM.

New, there about $70 or more. The one in my 93 is from the junkyard and cost less than $20. It'* still working well. Since it'* so easy to change, I decided that saving the $$ was the thing to do. If the used one fails, I can replace it in about 15-20 minutes with minumal effort.