Originally Posted by 05Level2
hmm interesting, what exactly is a sun load sensor? im guessing its in the defrost panel it is in the long panel thats a few inches wide at the bottom of the window, thanks for the quick responses guys!
The Sun Load Sensor is a type of photocell for the Explorer EATC Climate Control. It is one of several inputs to the EATC that it uses to decide the volume, direction and discharge combination for best interior comfort. Once again, it is irrelevant in stock Rangers because they only came from the factory with manual HVAC.
Here's a photo of the SLS shown clipped to the underside of the defrost panel:
And here is another provision for the EATC that serves no purpose in a Ranger. It is the intake port for the Interior Temperature Sensor. Ford eliminated this port from the Ranger dash a few years ago but I don't know exactly when. You can see the small louvered port in this pic between the radio bezel and the passenger airbag cover.
It is possible to convert certain year Rangers to the Explorer EATC. The EATC mod is not a trivial project but John Griggs's excellent and extensive How-to
makes it easier.