A good friend of mine who knows aboat saabs told me to check the connection at the blower motor underneath the windshield wipers and sure enough the connections were all corroded.I cut the wires from the spade connectors and the plug and spliced in longer wire and put on new crimp connectors problem solved
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The large fuse you checked is for the rear fan blower motor. The fuse you need to check is for the fan motor relays and rear mode control motor. It is fuse No. 3 (7.5A) located in the driver's under dash kick panel fuse box.
If fuse No. 3 is blown and you replace the fuse and it blows immediately, you'll have to check the five relays and the mode control motor all located near the rear A/C unit in the right aft sidewall. Most likely, the mode control doors have become jammed and that is why the fuse blows. The doors shift air from overhead vents (cool) to floor vents (heat).
If the fuse is fine, the trouble is probably with the blower motor itself or the wiring to the blower motor is broken, or there is a bad ground.
First check the fuse for the heater/ac fan. If the fuse is OK, you probably need a new blower motor. If the fuse is blown, replace it. If it blows again, you could have short in the heat/ac control computer, or the blower motor may still be bad. In this vehicle, the blower motor is probably less expensive to replace than the controller, and you can test the blower once it is disconnected by applying battery voltage to it (observe correct polarity). If it does not move when jumped directly to the battery, it is almost certainly bad.
for parking brake and abs check for parking brake switch operation, for abs check with scan tool for any trouble code, for your cruise control unit check for any broken vacumm hoses on the engine, for the ac fan, check the fan motor, relay or fuse.
Needs a blower motor resistor if the fan only blows on one speed. It is located underneath the firewall on the outside, near where the passenger exhaust system is. You need to take the passenger side cat converter off to get to it.