It is for this reason that we present here the proper way to wire a fog light systems. Basically the relay protects the switch from getting hot and creating unwanted resistance.
Foglight Wiring Modification
Fog light relay wiring diagram. It is for this reason that we present here the proper way to wire a fog light systems. 6 connect short black wire to ground. Relays are an important component in wiring fog or driving lights with a 30 60a draw. Pictured is my wiring diagram for installing two fog lights with fuses a switch and a relay. Connect the yellow wire to the yellow switch wire terminal and to the relay terminal labeled 85. Wiring diagram comes with a number of easy to stick to wiring diagram instructions.
2 connect black wire to battery negative. Fog lights off with high beams on relay wiring diagram. While proper wiring for fog lights is not just adding a wire and a switch its not difficult and is. Connect the red white wire to the lamp terminals and to the relay terminal labeled 87. How to wire your light using a relay the relay will have 4 points on it marked 30 87 85 and 86. It is meant to aid all the typical consumer in creating a correct system.
The low current through the switch triggers the relay to make a higher current connection to the heavy load of the fog lights. These instructions will probably be easy to grasp and use. Properly installed and wired these lights make it much easier to drive in foggy conditions as they light the road much better than normal headlights. 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. 5 connect short red wire to headlight positive or side marker positive. 4 connect yellow wires from the switch and the relay together.
The etiquette rules for fog lights are the same as for bright high beams. Test the operation of the lamps as follows. 3 connect red wire to battery positive. Connect one black lead to the vehicle ground and to the relay terminal labeled 86. Fog light relay wiring diagram positive ground wiring library fog light wiring diagram with relay. 1 the two connectors will be connected to the fog light assembly.
Power 12v to the fogs lights passes through the normally closed contacts of the relay terminals 30 and 87a. Wiring diagram and the sequence below. Fog lights are a great do it yourself add on for a car or truck.
Gallery of Fog Light Relay Wiring Diagram
