Fuse for trailer lights?

[capri_auto]

Is there a fuse for the trailer harness? All of a sudden my trailer lights aren't working.I tried other trailers and still nothing. Where should I start? This is a factory harness on an 04 D2. Picking up my new bass boat tomorrow and would like some lights.

 

[JohnB]

Mine went dead and what was wrong was the factory control box was full of water.
I ended up buying the euro to us kit from uhaul and did a rewire.
This also deleted the rover trailer female plug so not as pretty as OE.