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Posted on Jan 02, 2017
I had the same problem in my 1994 safari. I thought it mite have been the resistor form other peoples comments. I removed it and tested it. The resistor was fine. The heater fan relay was bad, but I was able to repair it myself. If you remove it and inspect it there should be two contacts that need to make a good connection in order for it to work properly. When the fan is on high there is a little electro magnet that pulls the contact up and engages the fan motor to full speed. When it is not on high the lower part of the contact rests on the lower half of the relay flap. if there is not a clean connection at this location you are not sending signal to the resistor which controls the other three fan speed settings. Inspect this connection and if possible clean the contacts with emery cloth and make sure that the contacts are making a good connection. This should do the trick to make the lower speeds work if the resistor is still good. If this is too much brain damage try replacing the relay first and see what happens, if you are still getting the same result then the resistor or the fan switch is bad.
Posted on Mar 31, 2009
SOURCE: heater blower makes loud noise
You need to lubricate the 2 bearings on the motor. Takes about 30-50 min to take the area under the hood apart to get to it. It is in the housing underneath the Wiper assembly. Go to benzworld.org or peachparts.com for possibly pictures on how to do that.
Posted on Jul 21, 2009
If your talking about the blower motor, its under the hood. If you buy a delco part there will be instructions in the box. There is a plastic/rubber cover over the motor that needs to be cut with a very sharp knife. Anyway buy the delco part and you'll be able to figure it out from there. Good luck.
Posted on Jan 20, 2011
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