Question about 1994 GMC Safari
I tried everything from the fuse box to the wires and still nothing what is happening
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
It may be the relays. i had the same kind of prob with my 1990 gmc 2500. i whent to a junk yard i got relays from there . thay well cost around 3 or 4 bucks
Posted on Jan 03, 2010
Probably your resistors. You will need to get it serviced
Posted on Jan 30, 2009
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Posted on Jan 02, 2017
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