Test the operation of the lamps as follows. This wiring diagram will stay with the car so make it neat and easily readable.

4c0212 Fog Light Wiring Diagram Without Relay Wiring Library
Fog lamp relay wiring diagram. It is for this reason that we present here the proper way to wire a fog light systems. While proper wiring for fog lights is not just adding a wire and a switch its not difficult and is. The lamps and relay harness are to be used only with 12 volt automotive. Fog lights are a great do it yourself add on for a car or truck. Draw a diagram on plain white paper with wire gauge noted and colors identified. Wiring diagram comes with a number of easy to stick to wiring diagram instructions.
Pictured is my wiring diagram for installing two fog lights with fuses a switch and a relay. Before cutting any wire a good diagram is in order. The etiquette rules for fog lights are the same as for bright high beams. 6 connect short black wire to ground. 2 connect black wire to battery negative. Fog light relay wiring diagram positive ground wiring library fog light wiring diagram with relay.
4 connect yellow wires from the switch and the relay together. Connect one black lead to the vehicle ground and to the relay terminal labeled 86. The lamps and relay harness are to be used only with 12 volt automotive. 5 connect short red wire to headlight positive or side marker positive. Wiring diagram and the sequence below. It is meant to aid all the typical consumer in creating a correct system.
Connect the red white wire to the lamp terminals and to the relay terminal labeled 87. Each component must be labeled. 3 connect red wire to battery positive. Draw a diagram on plain white paper with wire gauge noted and colors identified. 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. Fog light wiring diagram jun 17 2012 327pm does anybody know if the 2010 1500s came pre wired with the factory fog light harness or do i need to have the harness professionally installed or can it be a diy kinda job.
The throttle cable and away from hot parts such as the exhaust manifold. Find a power source to connect the switch power wire to. Learn what a relay is how it works and why you should use one. These instructions will probably be easy to grasp and use. Connect the yellow wire to the yellow switch wire terminal and to the relay terminal labeled 85. For legal operation of fog lights the power source must be one that is only powered when.
1 the two connectors will be connected to the fog light assembly. Use as reference only. Fog lights off with high beams on relay wiring diagram. 12v universal wiring harness kit relay fuse switch.