|
There's a blower control module. When it shorts it causes the problem you described. I just replaced one on my 93 with a used one I found on ebay for about $20.00. They cost a lot more brand new. GM uses these on lots of cars so a junk yard may have one from an Olds, Buick, or other GM car. It's in the engine compartment near the firewall under the relay panel. It's located in the airstream of the blower motor to keep it cool. It's fairly easy to replace in about 30 - 45 minutes.
To be absolutely sure this is the problem, you could check it with an ohmmeter to see if it in fact is shorted from the voltage supply to the blower motor connection.
|