You might have to switch the pins in the harness. I know if you don't swap them then you'll have problems but i'm not sure what the exact problems are. The instructions are on this forum somewhere. I'd try the retrofit thread in the how-to section. Also for the not turning on at the same time what i usually do it just let the car run for 30 seconds then trun them on. It's like that gives them enough charge or something. I'm thinking about getting a bigger alternator and hoping that helps.