I have a Viper fan and before installing I wanted to test. Want to make sure I did it right. I grounded the black wire and applied 12v to the other 2 pins one at a time. As I understand it one is high speed and the other is low speed. The fan would not run in low or high. I also ran a continuity test between ground and other 2 pins. It checked OK. Am I missing something?
Dick