left turn signal for trailer is not working and did not find a fuse for it

 

Check for power at the truck. If you got power there then it is down line into the trailer.

 

there is no power to the connector

 

Its not a fuse or your truck brake lights wouldn't work.
do you have a 4 way trailer connector on the truck?
You need to get the wire schematic for the 4-way, do all your voltage checks there first. Check for your 12volts and ground at that connector, then turn on your turn signals and with a test light probe the 4 way. the test light should flash with your turn signal bulb at the same time, check both left and right signal. if good then the problem is the trailer wiring
Does anyone know of a forum similar to this one but for Chrysler-Dodge-Jeep Dealer techs only?