We have a 2011, and there was some confusion about fuses for clearance lights. Apparently some units were built without inline fuses while others (ours included) were built with the fuses. If your unit has them, they will be hanging from the wiring harness that goes up to the roof area and you should be able to see them either from the generator compartment or in the rear above the taillights. The front and back lights are fused separately on ours. Sounds like you just need to find the fuse holder and put in a new fuse.
BTW, if you are a member of the Tiffin Owners Forum (TiffinRVNetwork.com) this subject has been discussed more than once. If you're not a member, you're missing out on some great help from fellow owners!
