rear tailgate and wipers not working
 

i need some help with my 02 td4 es auto. today i came to open the rear door and nothing happened, i can hear the micro switch being pressed in but nothing. i tried holding my button on my key fob for about 30 secs and still nothing, i tried opening it with the key and yes you guessed it nothing. checked all the fuses and nothing has blown. also the rear wiper doesn't seem to be working as well. when i close all doors and lock the car from key fob the horn sounds once to indicate a door opened. could it be that plug coupler has come loose somewhere or is it more serious then that. any sugessions would be very welcome.