Where is the Trailer Fuse located?

Yep, there are 7 fuses that run the trailer lighting system test fuse # 15 on the fuse panel on the left side of the dash, # 86 and fusible link L in the fuse panel under the hood on the left side and fuse # 90, 96 and 99 in the fuse panel under the hood on the right side. Here is a guide to help you test them and the fuse locations with the wiring diagrams so you can see how the system works.

https://www.2carpros.com/articles/how-to-check-a-car-fuse

Check out the images (below). Please let us know what you find. We are interested to see what it is.