Yes. Preface: I have the negative ground spike problem but have not installed the replacement harness from empeg (I've got some relays on the power lines instead). I see it when I've shut down the car (engine off, key out) and turned the empeg back on (ie I want to listen to the stereo while filling the gas tank). When I get back in and start the car the empeg comes back up and then I see the battery symbol for just a few moments. I've noticed no other effects.

-Zeke

just say you weren't paying much attention...