27. To wire up the Spyder halo rings and LED lights ($360.95 from www.autoanything.com), we needed to tap into the running lights. It's important to not splice into the turn signal light, or else your halo rings will flash every time your blinker is engaged. Using a Power Probe Screamer, we easily found the proper wire to tap into. In this F-350's case, it was the purple wire with white stripe.