jbmrn73, some TT's ave a similar breaker on the battery post, other than following the wiring along the frame if you find a junction box it could be inside. Next I suggest looking in the circuit distribution panel, look for 2 - 40 amp fuses that can blow they are called reverse polarity safety fuses and will blow if the battery gets hooked up backwards.
Dale & Terri, Lulu & Tiki (our Chihuahua's), New rescue puppy Prince - Pom/Pug mix.
2013 Tundra, Double Cab, 5.7, TRD Off-Road, 4X4, Full Tow Package
2013 Wildwood T26TBSS - Sold
2000 Gulf Stream Sun Voyager M-8357 MH, Ford Trident V10 Gasser, 35 foot.