Number two on the list: https://www.hagerty.com/articles-videos/Articles/2016/05/20/secret-loves?utm_source=ExactTarget&utm_medium=email&utm_term=&utm_content=&utm_campaign=Hagerty%20Weekly%20News%205-25-2016
That's the door check, actually it's a broken door check. It bolts to the door and the arm that's missing attaches to the door frame using a bracket and roll pin.
http://www.amazon.com/Dorman-924-148-Door-Check/dp/B00GHT6ZWU/ref=au_as_r?_encoding=UTF8&Make=Jeep%7C42&Model=Cherokee%7C347&Year=1990%7C1990&ie=UTF8&n=15684181&newVehicle=1&s=automotive&vehicleId=1&vehicleType=automotive
http://www.amazon.com/Cherokee-Comanche-check-bracket-MOPAR/dp/B00LFW2Y10
This is where I measured, all three MJs were within 0.1" of the measurements I listed.
BTW, I used my machinist's ruler, that's why the measurements are in tenths of an inch.
HA!
It's blue because the bulb gives off yellow light resulting in a green light matching the switches and heat control panel. If you use a white LED in any of them it will result in blue illumination.