Slo-Sho
It wasn't me!
This happened to me a few days ago...when the parking lamp switch is turned off, the brown wire (+) sees ground. This wire was tapped by my alarm to supply a + signal to give a parking lamp confirmation flash anytime the alarm would arm/disarm. Since the parking lamp wire is now for some unknown reason grounded, there's now a conflict between the two wires. Does anyone have a Ford EVTM manual handy? I don't know where it could possibly be grounded besides the actual switch itself, but when I turn the lights on, everything works as it should.