I had a problem with my ddm tuning set up as well (was blowing fuses) with their relay harness. so i took the hole thing out and started fresh with the TRS set up, no relay just the canbus adapter, it works perfect, the only two issues are when you plug their harness into the ford factory plug its upside down, so you cant use the snap lock on the plug unless you remove the wires from the trs plastic plug and reverse them,or you can just run a piece of electrical tape around the plug to hold them together, and the bulbs are a little tough the get in . but this trs kit with the canbus adapter is just plug and play . works great.