Where is the earth strap also???

So I hooked up before all this was a small device that's supposed to send ultrasonic noises or what ever to keep rodent away from my car. I disconnected it. No issues been a week

I had same issue. Bought a replacement light on Ebay that had the 2 electronic modules on the house. Did a swap with the LED strip and 2 modules. Worked. Getting the headlight apart is a pain. You have to bake it in the oven at 270 degrees for 7.25 minutes so the glue gets tacky.

Any luck? I'm having the same issue.