Add this exciting mod to your PT! The BLP-1PT pulser module can give you an extra measure of safety while sporting about town. This device is a fully "Plug-N-Play" harness that simply plugs into your existing Center High Mount Brake Light. There are no wires to cut, and no adjustments to make. You don't even need any tools!The unit automatically pulses your third brake light when you apply your brakes. The light will pulsate on and off for about a second, then stay on steady for as long as you press the brake pedal. The unit is designed to create a gentle fluttering of light, so your car is more noticeable, yet it doesn't aggravate the driver behind you (notice how you can see it flashing, even while reading text down here!).The "Delay-Repeat" circuit means the brake lights have to be off for at least 15 seconds before the cycle can be restarted. So, if you are in bumper-to-bumper traffic, the brake light isn't always pulsing.