Today I slightly hit the driver door and it did not close all the way. When I returned, the light said the driver was opened. I opened and closed the door again and then the sign went off. I tried to lock the doors with the alarm and it did not go on. I noticed all the other doors were locked except this one. I think tried to manually lock the door and it will not allow me to do it. I know these cars are very sensitive but will it eventually run it's course and allow me to lock it again?

Check for sticking mechanism. See if the Owner's Manual mentions LUBRICATING the door. Buy some graphite or teflon-type lubricating liquid to apply to mechanism. And I'd NOT use the electronic button until you get this fixed as you may burn-out / wear-out the motor prematurely.

doors do not alter in their openings unless the following has occurred
accident that alters the door opening shape or alters the door hinge position
badly worn hinges
people hanging off open doors or lastly
the sill panels ( rocker panels ) under the door that are part of the door opening and body strength have rusted away under the car allowing the door opening to alter and affect the doors closing properly

Sounds like the door latch is not closing all the way, Try spraying some WD40 into the latch in the door where it hits the striker post. Hold the door handle up and bump the door shut and open while holding the handle up on the out side several times, This should loosen the latch up and the door should close and latch. The more you spray and work the door the better it should get. If not the latching mechanisim may need replaced. I hope I have help you sovle the alarm problem.

In the Ford Ranger, the light switch can be found in the door, right by the latch. You may need to use some WD-40 to get to work properly. -------------------------------------------------------------------------------------
zed bull

It appears that one of the door operated switches is making contact even though the door is closed. This is indicated by the door open light coming on It could mean one of the the door catches is slightly out of adjustment allowing door to sit slightly away from body. Try checking each door for a loose fit by pushing the closed door in, especially the driver's which gets the most use and see if the light goes out. There should be only a little movement as the sealing rubbers are squeezed a little more. If door catches are tight then it may be that the rubber pad attached to the door that pushes on the door switch button has compressed and is allowing switch to make contact.

Hold the hatch hard closed into its frame whilst pulling on the release handle. The mechanism on most cars consists a grab/release on the door and a simple metal hop at the bottom of the frame. Over time the hoop can become loose and move slightly inwards each time the door is shut. The door seal rubbers push back on the door surround putting a lot of tension against the grab/release mechanism preventing it from releasing. By pressing on the door and compressing the rubber surround you will take the pressure off the release mechanism and allow it to open when you pull on the handle. Once the door hatch is open, loosen the mounting bolts to the metal hoop and move it out about 10mm. Tighten the mounting bolts. Shut the door gently as a trial close and check for security of fit. If very slack, ease the hoop inwards a couple of millimetres. When happy, tighten the mounting bolts securely. draw around the hoop mount with indelible ink so if it moves in future you have early visual warning and can remount it easily

If your window should lower/raise slightly,when opening/closing.
Try reprograming
Make sure other door is shut
Open drivers door,lower window,enter car,shut door,raise/lower several times
Providing you have no other problems this will reset window.

Check your buttons, levers, that are pushed in when door is closed, at your door posts. Use your thumb or finger and watch interior light go on & off as you push them in. If light flickers when in all the way, you found the bad switch. If they work o.k., check and see if maybe your door striker where door latch locks onto, needs adjusted in slightly to keep door tighter. Usually you can tell that if the door doesn't line up good when closed, with other door or rest of body. It will be sticking out slightly further.

The problem is the door latch, you can use sawsall to cut the door stricker off this way you can open the door and replace the latch

The light button to the door is not pushed in enough to turn off. Tape it up or just may need a little WD 40, from just sticking.