Hi I just bought dual aeroforce interceptor scan gauges for my 2000 Grand Prix and they don't turn on when you turn the car on I guess I have to hook them up to a acessory wire in the car because of the year of my car? Well as far as I've read you use the red wire on the extra plug they give you and hook it up to an acsessory wire anyone done this? Where did you hook them exactly? Help is appreciated thanks!