I am having a trailer brake light issue, that is happening on both my camper and boat, with the 7 and 4 plug, so I am trying to see what fuse I need to replace without pulling all of them.

Does anyone have a diagram, or know which fuses control the brake lights for the trailer connections?

Thanks.

 

My 1999 F150 owners manual says:

In the power distribution box under the hood fuses:

see picture below...

#20(top) - 10amp Trailer Tow Stop and Left Turn Lamp
#19(bottom) - 10amp Trailer Tow Stop and Right Turn Lamp