Signal light problem on my 2005 town and country sometimes when you turn your right signal on it will start blinking like it should but then it will stop and the left signal will start blinking for just a couple of times then go back to the right side again dealer couldnt find the problem of course what could the probem be?

Looking at a wiring diagram i see the turn signal switch is a input to the BCM - body control module .The BCM controls the turn signal's by use of what car maker's call a driver inside the module , all it is ,is A transistor . The rear turn signals go right to the rear turn signals while the front go from the BCM to an through the integrated power module. to the front signal's . Without testing this is just a guess ,but i would say Mr wood could be correct or possibly a ground problem ,voltage back feeding through the circuit looking for a good ground. Looking at a wiring diagram an using a DMM - digital multi-meter an doing voltage drop testing on the circuit would be the way to find the problem .
Free wiring diagrams here http://www.bbbind.com/free_tsb.html
Enter vehicle info. year , make , model an engine size. Under system click on lighting ,then under subsystem click on turn signals . Click the search button then the blue link . Watch these video's , then test the circuit's .
Mastering Voltage Drop Testing with Pete Meier and Jerry Truglia
Electric Testing Techniques You Need to Know

The TIPM totally integrated power module may have corrosion causing cross feeding into other circuits .