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Troubleshooting 101
First you have to determine if it is a fuse, switch, the blower motor. Check the fuse panel for any blown fuses, then the next step would be to check if power is getting all the way to the fan motor. On the rightside of the footwell there is an insulated rubber cover over the fan motor housing. You don't have to remove the cover. With a flashlight if you look toward the top of the fan motor housing you will see two wires. Mine are color coded purple (on the left) and black (right). With the engine running, I measured the following voltages: 6vdc to 13.5vdc on the purple wire and 0.0vdc - 0.8vdc on the black wire. The voltage varies on the position of the fan speed switch. I don't know what is factory spec for these test points, use mine for reference only. If your voltages are similar, then I would suspect the blower motor, if no voltage is present I would expect the problem to be back towards the switch. The switch is part of a fan/ac control module and has to be replaced as a unit on the 93 burb, I don't know if the 95 is different. If you want more info on the fan motor swap check out my earlier post at: http://www.gmtruckclub.com/forum/showthread.php?t=3399
First you have to determine if it is a fuse, switch, the blower motor. Check the fuse panel for any blown fuses, then the next step would be to check if power is getting all the way to the fan motor. On the rightside of the footwell there is an insulated rubber cover over the fan motor housing. You don't have to remove the cover. With a flashlight if you look toward the top of the fan motor housing you will see two wires. Mine are color coded purple (on the left) and black (right). With the engine running, I measured the following voltages: 6vdc to 13.5vdc on the purple wire and 0.0vdc - 0.8vdc on the black wire. The voltage varies on the position of the fan speed switch. I don't know what is factory spec for these test points, use mine for reference only. If your voltages are similar, then I would suspect the blower motor, if no voltage is present I would expect the problem to be back towards the switch. The switch is part of a fan/ac control module and has to be replaced as a unit on the 93 burb, I don't know if the 95 is different. If you want more info on the fan motor swap check out my earlier post at: http://www.gmtruckclub.com/forum/showthread.php?t=3399
