Thanks for info. Hope to play with it tomorrow. I don't have a single aftermarket install, except FiTech EFI, right to battery, and I disconnected that before testing.

It does have factory spotlight, which I don't know if is fused. Maybe inline fuse? I haven't followed the wiring for that which I suppose runs into a factory police harness which could be fused to one of the ones labeled "accessories" and I pulled every fuse when testing. But I would certainly notice if the spotlight was coming on/off at times.