Door open light stays on and reverse sensor problem

[Weiss1]

Hey guys! I'm new to the site and just want to say......wow! I love this!

Anyhoo,
I have a 2002 F350 crew cab shortbox 4x4 with the 7.3
I love it to death, but I've notice a couple of problems.
2 things:
My "door ajar" light stays on and therefore my interior light also stays on for a few minutes until it times out. All of the doors are closed and secure. It seems like it is the drivers side rear door that is the culprit. I thought I'd just spray some lube on the switch........but I can't find the switch! What activates the "door ajar" light and what can I do to correct this problem?
Also,
I have the rear sensors, but whenever I put the truck in reverse they turn off. So I put it in Drive or Park....make sure the Off light is not lit up on the sensor switch and again, the light goes to "OFF" when I put it in reverse.
Any help with these issues is greatly appreciated.
Thanks a lot guys!

[daytondiesel]

I Had The Same Door Light Problem On My 2003. It Was Still Under Warranty When It Happened So I Took It To The Dealer And They Replace The Latch Or Loop And Told Me The Sensor Was In That. Can't Help On The Reverse Sensor Problem.

[CHAD5.0]

The switch is on the latch. You have to take the latch out of the door and then you can change the switch. I have done 4 of them in the last 6 months, pretty common problem.

[2k929]

Just try spraying the switch with some old WD. I had the same problem awhile back. Just spray the locking mech and then open and shut the door a few times.