I just fixed my door ajar light on my 02 fx4. Same switch as my previous ranger was giving me grief.
Drivers rear door bottom switch.
I was going to disconnect the switch and not bother with the latch. But I pulled the latch out. Cleaned it all up and now the latch closes nice and secure.
With you back door closed and the front open....Pull on the bottom of your back door. Is it loose? If yes.. than this is probably the switch throwing the lights on. This is a COMMON issue. Slamming the door may work for a bit, but after a while it will stop working, and you will ruin the latch. Fix it, OR if it can't be fixed, disconnect the wiring to the switch so the DOOR AJAR light wont come on and **** you off.
Last edited by joecool1320; 03-17-2013 at 10:15 AM.