I have a 1994 Pontiac formula WS6. I am curious what actually lets the motor know it is in the up or down position and to stop... My headlight cycle down then up when i turn them on and down up when I turn them off. They do not however grind at any point the smoothly cycle through their motion and always stop in the up position... I am sure it is Un-related but the door locks wont function either( the actuators are good the switches are good the wiring is complete and has continuity but when i try to lock or unlock both poles on the actuator receive +12v with no ground present I think it has to be the key less entry box.... everything test fine into it but all screwy out of it... only odd thing is i can put the box in a 94z and it works.... if he had the box in his car i would try to swap it... if there is anyone in the Sarasota Florida area with a know good receiver i would love to test the theory

 

well i dont know about your door locks, but im pretty sure the headlights on our cars stop because of the physical resistance "heating up" a circuit and cutting the breaker. That's why people's gears in the motor get worn out. (also because they're made of plastic)

 

my gears are fine... no dead spots no niose just cycle when you try to use tehm... smotth action up then down? does the headlight control module mounted to the intake have anyhting to do with stopping them?