Took my car to audio shop and found out my harness relay went bad so had to get new one. I believe the last harness had the ground wire ran to it so I could watch dvd while driving. On the way home from the shop screen started flickering, totally lost my visor tvs, and all sceens slowly started losing clarity and the "it's unlawful to watch t.v. and drive" screen kept coming on and off. Shut the car down and everything worked fine at first and then noticed the flicker again. Sound like the ground???? I was watching them work on it and I think i waw them running a wire to my fuse box. May have that been the ground? any thoughts would be nice