melmanF150

I have a 2004 Ford F-150 Lariat 2WD and i am looking to install a NEW LED Brake Pulse X +60 LATEST Flasher Universal Strobe Module Relay I purchase from Amazon. The directions require either installation at the tail light or the brake switch above the brake pedal. I want to install at the brake switch so all of the lights in the rear will flash. I need to connect to the positive wire before and after the brake switch and the negative wire before the brake switch. Does anyone know the color of those wires? Can you send post a wiring diagram of the brake switch?