How do you stop the headlights on your 1997 Jeep Grand Cherokee from turning off and on when you think the sensor is dirty or needs to be replaced but you do not know its location?

Answer 1

The sensor is located on top of the dash. You have the red LED that flashes when the alarm is set and the photo-sensor is just in front of this. It may or may not be the actual sensor though because it could be the circuit that processes the signal sent from the sensor. The sensor just changes resistance based on the amount of light that it reaching it and there is a circuit that uses that to decide whether to turn the lights on or not. My understanding is that this circuit is part of the headlight switch.

If you're like me you are experiencing this problem around dawn/dusk and in well lit parking lots at night. I'm still looking for the solution.