DSE RS headlight motors kill engine

[Steve N 69 69 69]

I installed the DSE RS headlight motors, and they work great. Then I tried them with the engine on (LT1) and it dies instantly when the doors open. If I hold the rpm to 2000,then pull the lights on, it stumbles for a second, then runs fine. The weird part is, it does it again when I turn the lights off too.
I wired it up just the way the instructions said to. Its grounded well, and the motors/lights work perfectly with the engine off.

The DSE light brain is mounted to the brake pedal bracket ( just where the instructions said to put it) and the computer for the motor is about 2 feet away, on the trans tunnel. Could it be some kind of shielding thing? Its like the headlight brain kicks out a EMP that kills the LT1's PCM.

I'll call DSE, but just thought I'd see if anyone had any ideas.