Mr. VacuumMan takes the time to add an extra step of prepping your unit to better withstand the fluctuation in temperatures in the Canadian Climate. This unit is located in the trunk behind the driver side wheel house and requires no modification to the original wiring. We highly recommend you change the flasher under the dash with our solid state unit. This is a direct fit replacement, just pop open your black plastic box located in the driver side trunk drop off and plug it in.