Ford Aerostar :: 1997 - Dome Light Came On While Driving / 5 Seconds Later The Doors Locked

I have a 1997 Aerostar 4.0L 165k Miles Keyless entry

I am having strange electrical problems. This happens on an unpredictable basis but is getting more frequent (ie. use to be once every couple days and now is happening several times during my 24 mile drive to or from work).

After starting, the car door locks may automatically lock; however, a few seconds later they may lock again, and again.... This may happen 5-10 times in a row then it stops for 5 minutes or 2 days.

This week a new symptom showed up. The dome light came on while driving. It stayed on for a few seconds then went off. 5 seconds later the doors locked. This may or may not repeat. The light may stay on for 5 or 30 seconds always followed by the doors locking. It may repeat once or sever times in a row. I also noticed if I stepped on the brakes it turned off the dome light and then the doors locked but then it would likely start again. Turning on the headlights did not seem to have any effect.