You can wire it DIRECT, or u can put a timer circuit (radio shack) that will only allow it to run for 5 mins after u turn off the car (so u don't kill ur batt) -- OR you can just remem to turn it off everytime. ORR you can wire the power to the ECU power, or any other relay that only gets power when the car is on. Ur call. U have lots of options.