Hey for months I was trying to firgure out what can cause my battery to die after 2-4 days in my car, Anyhow I thought it was my kenwood eq & head unit and according a forum member he said that kenwood mis label the constant wire and the acc wire switch wire around and my battery still die and today I try to start up my car and the battery die and tuesday was the last time I started it. Anyhow I stumble of my fan mod switch was on so I decide to do a test. So i removed my neg lead and put the test light on it and the test light lid up very bright, I turn the switch off and the light goes out try it couple times and to make sure it was the switch and it was the switch. This is what happen when u leave the switch on it send a ground to one of the fan relays {standing from the right side of the car it's the back relay} and cause it to stay's on and that is what is killing my damm battery, I am very happy that I found that problem, Also I switch back my radio and eq wires according to manual and do some testing and no light lid up on my test light. sorry for this to be so long.khris