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AC blower not working

7 messages,  Last post on Aug 22, 2009 at 3:14 PM

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#5 of 7 Re: AC blower not working [terryblack64] by imidazol97 Jul 02, 2009 (12:08 pm)
Replying to: terryblack64 (Jul 02, 2009 11:05 am) You need to check the motor with a direct wire from the battery with a fuse in it and ground the motor wire to see if the motor works with battery power.   If I recall, the resistor pack gives the lower speeds and HIGH speed is a relay that connects directly to the battery power in the relay center. So if the resistor pack burned out you lose 1,2, or 3 speeds and the HIGH still works. Or if the relay or fuse burns out on the HIGH speed the others still work.   So carefully remove the power connectors and check the motor. The relay center can be raised by removing two screws holding it and then it has some slack and can be raised a little to give work room.   If you replace the fan motor, be careful with the plastic around the housing; it's been hot a lot of years with motor heat and becomes brittle.
#6 of 7 97 blower by littlerex Aug 22, 2009 (8:14 am)
I have a 1997 Bonneville, the ac is cold, has auto ditgatal control. The blower works sometime, then will stop and not work other times. Replies to this message: imidazol97 (Aug 22, 2009 3:14 pm)
#7 of 7 Re: 97 blower [littlerex] by imidazol97 Aug 22, 2009 (3:14 pm)
Replying to: littlerex (Aug 22, 2009 8:14 am) You can test your blower motor by disconnecting the leads and using straight battery power (with a 20 amp fuse) and ground to see if the motor works right. If not replace it.   If the motor is okay it is probably your blower motor control module that's in the blower housing where the blower leads go. It's under the relay panel. The relay panel has two bolts and can be pushed up some to get room to take out the blower control module. It works like the resistors in old style systems; it sticks into the air stream for cooling.

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