exterior lights blink when car is off

06 durango
Having problems with the head & brake light flashing with the car turned off .if it sets overnight the battery will be dead in the morning any suggestions.:shakehead

start with unplugging the head light switch,see if they quit turning in and off

Headlamps and brake lamps are two totally different circuits fed by different fuses. Is there a security system on the vehicle?

Headlamps and brake lamps are two totally different circuits fed by different fuses. Is there a security system on the vehicle?
yes from the factory

yes from the factory
liked the picture we surely don't need another 4 yrs of that.

You might check your owners manual... it will tell what fuse feeds the security system; unplug the fuse and see what happens in the morning. This is a place to start, it might tell you if the problem is with the security system.