Seneca M2 Brake/Turn Signal

[RogerSwann]

2014 Freightliner chassis, right brake and turn signal is not working. The parking light works. I plugged a set of tow lights into the flat plug and had the same result. Rules out the bulbs, but they are led anyway, so I doubt they would all quit at the same time. Also the 3rd brake light works.
Any experts on where to start checking? Turn signal switch possibly?

[Grumpy]

I think someone mentioned fuse box behind driver's seat.

[Robbbyr]

Grumpy is correct, circuits for rear lights have fuses and relays in a module behind the driver's seat. Likely covered with a carpeted flap, which on mine is held in place by a screw.

Be careful while exploring, there are exposed large-gauge 12-volt hot connections that you don't want to short out! I insulated mine to help prevent future problems.

[RogerSwann]

I'll look under the seat for fuses/relays. What did you insulate the hot connections under the seat with? I used liquid tape on my toad aux brake wire connections, mostly to prevent rust/corrosion. Would this be a suitable application for this type product?

[Robbbyr]

Originally Posted by RogerSwann

I'll look under the seat for fuses/relays. What did you insulate the hot connections under the seat with? I used liquid tape on my toad aux brake wire connections, mostly to prevent rust/corrosion. Would this be a suitable application for this type product?

Liquid electrical tape is exactly what I used. Several coats over several days!

Let us know what you find please.

[RogerSwann]

Found my culprit.........RT TURN fuse (20a) under the driver seat as advertised on this forum. I found it interesting the fuse/relay block for the "trailer" checked out fine. Since my 4 way flat trailer plug had the same symptom, it must be wired with the "body" fuses. The "trailer" connections must be wired only to the round 7(?) pin plug.
I wonder why the fuse was blown, thinking it might be my magnetic toad lights, I have the wire snaked under the body of my F150 to the rear of the truck, might have some exposed wiring touching metal. Would this cause a fuse to blow?