So I'm finally posting up here about this problem.
I installed DDM HIDs in my headlights and fog lights a few months ago. The fogs work fine, no issues. But a few times I've noticed that the headlights stay on after being turned off.
The first time I really noticed it was at work one day in the summer. I got a text from my buddy saying that my headlights were on in the parking lot. I was out and couldn't go turn them off, so I had to just cross my fingers. Got back at lunch and sure enough they were on. Turned the truck on (it started just fine, no battery draining at all after 4+ hours), and cycled the light switch on and off, and they went out.
Since then I have seen it happen a couple of other times as I'm walking away from the truck. I go back in, cycle the switch and they go out. Today it happened after just a short jaunt to the store. I came out and they were on. I tried cycling the switch but it didn't want to turn them off this time.
Any idea on what is causing this issue? I'm thinking that the ballasts/bulbs are just getting too hot and need to cool off before the switch will allow them to turn off.