By the way, I hate to ask, but did you put the headlights on a relay as well? That would take all of the load off of the headlight switch and place it on the relays. I did mine myself and it makes the headlights noticeably brighter. You will need a couple of good quality relays and I used 12 gauge wire (less voltage drop). Its also a cheap fix. I would be happy to help but if you're looking for more of a plug and play option Crackedback sells a kit to do this. I think if I remember correctly its around $100.00.
