Product updated on 2019-08-28, SBx Parts - SBX:HID:HDRL, Daytime running light harness. , Daytime running light harness. Converts low voltage daytime running lights to a full 12 volts to prevent ballast failure with HIDs and reduced life with LEDs., Use this harness on vehicles with less that 12 volts supplied to the daytime running lights. Most late model Ford and GM's supply 9 volts to the DRL (Day-time Running Light module) circuit which will kill ballasts and LED bulbs over time. The lights will
