Waas just looking at the wiring diagram on my 99 Mounty and noticed a sun load sensor....anyone have any clue?

Does it have the electronic climate control? Maybe it automatically adjusts the temp if the sun beats in more while its on?

The sun load sensor is for models with EATC. I believe it's located at the top center of the dashboard right behind the windshield...haha...I have EATC and don't know where it's located. But anyways...the sensor, works in conjunction with outside temp sensor and interior temp sensor, senses whether the system should blow air at the panel or the floor or in combination.