Okay this is a new one to me. When I turn my key to the accessory position, my tail/parking lights come on. Also if I leave the key off and turn my lights on my accessories turn on, the radio and my GPS plugged into my 12 volt socket.

I did install an aftermarket CD player the other day and did hook the "dimmer" switch up to a keyed 12 volt source but that still seems odd.

Any ideas?