DNitxke
You don't need a specific shop for clearance light issue.
Look up auto electrical in yellow pages. It's all the same.
Often a ground issue, connection, or fuse. Clearance lights are fused from TV elect system not trlr(or at least mine are).
Cauliflower, if you are needing help to lower your trlr start new post here for the best advice you can get and well worth the price you will pay. We are all friendly!
steve