Fog Light Relay Wiring Diagram Positive Ground. THE STOP LIGHT SWITCH IS PLACED IN THE OPEN POSITION. When the coil of the relay is energized 12V from the high beam switch to terminal 86 ground on terminal 85 the normally closed contacts open interrupting 12V to the fog lights.
Remove the fog light bulb. Wiring diagram and the sequence below. Inspect front fog light relay marking.
Make sure there is a fuse in the fuse holder rated to withstand the amperage required to power the spotlight.
THE STOP LIGHT SWITCH IS PLACED IN THE CLOSED POSITION. We also suggest adding a fuse. While proper wiring for fog lights is not just adding a wire and a switch its not difficult and is. Connect the YELLOW wire to the yellow switch wire terminal and to the relay terminal labeled 85.