99 F150 Lariat 4x4.

My remote transmitter is intermittent in locking the drivers side door.

I have replaced the battery in the transmitter without measurable improvement.

The door locking system seems to be working ok when I shift into reverse or drive ater initial start-up.

Any ideas would be appreciated.
thanks
jt

 

I have the same problem,except it's with both doors...

almost like the battery is weak when not running.....

-Chris

 

Door lock accuator may be going bad