I tried everything from the fuse box to the wires and still nothing what is happening
Hi we have a 89 gmc safari van and heater blower/fan just stopped. We bought a new hearer relay and nothing, we think that ya have to pull everything out in left corner and get to the fan/blower and change it. BIG JOB!
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The resistor is not the likely candidate for a fuse problem. There is either a short in the electrical wiring to the blower motor, or the blower motor itself is faulty, causing the fuse to blow. Disconnect the blower motor from the circuit and try turning it on. If the fuse doesn't blow, it's probably the motor.
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.
this is a common problem, replace the blower motor resistor, its located near the blower motor bolted to heater box, it slides into the box ,remove connector, then bolts holding it to box then slide out of box,
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.