navion Posted January 14, 2006 Report Share Posted January 14, 2006 I recently bit the bullet and replaced the HVAC fan with the new style fan. I also replaced the pig tail as one of the connectors showed signs of overheat. The other day, the wife said that the blower fan had quit. I have gone through the obvious, checking the Maxi fuse, double check the pig tail & it's splices. I even went so far as to replace the APC unit. (I had a spare.) & still no joy. (There were no APC codes displayed.) I seem to remember a way to test the blower motor, but I can't remember where I saw the procedure. Anyone have any Ideas? I hope that the new blower motor is not shot, as they are not the simplest to change out. Thanks. Britt Britt Link to comment Share on other sites More sharing options...
KevinW Posted January 15, 2006 Report Share Posted January 15, 2006 I seem to remember a way to test the blower motor, but I can't remember where I saw the procedure. The red and black wires/terminals are B+ and GND respectively. The centre GRY/BLK wire controls the blower speed. The voltage on this circuit is inversely proportional to the motor RPM; when it is high (B+), the motor will not operate. If you wish to test the blower, hook up power and ground, then connect the centre terminal to one leg of a resistor (say 2000 ohms), and ground the other leg. The higher the resistance, the slower the speed. Kevin ___________________________________________________ Link to comment Share on other sites More sharing options...
navion Posted January 15, 2006 Author Report Share Posted January 15, 2006 I seem to remember a way to test the blower motor, but I can't remember where I saw the procedure. The red and black wires/terminals are B+ and GND respectively. The centre GRY/BLK wire controls the blower speed. The voltage on this circuit is inversely proportional to the motor RPM; when it is high (B+), the motor will not operate. If you wish to test the blower, hook up power and ground, then connect the centre terminal to one leg of a resistor (say 2000 ohms), and ground the other leg. The higher the resistance, the slower the speed. Kevin Thanks Kevin, I will have to get my decade box back from the friend that I lent it to. Hopefully I can prove that the motor is good or bad. Britt Britt Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.