Electrical problem
2003 Ford Windstar 6 cyl Front Wheel Drive Automatic 99,000 miles

What would cause my 2003 Ford Windstar van engine to begin to click, blinkers and emergency lights to flash, and engine not to start? We recently noticed the light inside the car sometimes turn off and on. We also sometimes have the car locks unlock and lock by themselves. We recently installed new keyless entry FOB would that cause a anti-theft malfunction??

Yes the keyless entry system you put in can cause all the problems you are having..