Hook up relay fog lights

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Contents:
  1. Harness Wiring
  2. How to Wire Fog Lights With Vehicles | It Still Runs
  3. How to Wire a Relay for Off-Road LED Lights

It is good practise and should not be ignored.

Harness Wiring

You will have to adjust the current ratings for the light you are using. In this case the light do not take more than 10A.

How to Install Led Fog Light on a Motorcycle (with Relay and Fuse)

That is W max. If you are installing lights over W it is advisable to multiply the required drain by a factor of 1. In other words if you are installing a W light bar that has a max drain of A relay is an electrical switch. When you are not using a relay, the control switch needs to be able to handle the full current of the installed lights.

For lower powered lights it is possible to do so, but it is generally good practice to install a switch with an in-line fuse. When the current increases, this switch needs to be big. Would it be better to reverse them and have the new lights coming from the fuse-block and the switch wiring off the low-beam wire? Functionality remains the same. December 14, 2: I agree — assuming the switch activates the connection between 30 and 87on the relay, I would have thought 30 on the relay should be connected to the fuse-block and the low current supply to the switch from the low-beam wire.

September 21, 7: Many years ago, I was driving late at night on a rural country road in very thick fog. I had maybe foot visibility.

How to Wire Fog Lights With Vehicles | It Still Runs

As I was coming around the mountain, all I saw was a single light. February 26, 5: I wanted the driving lights connected with the low beams to be legal in Washington State…hence I tied the wiring as written. Thanks for the comments, guys. There are sharp folk out there! Now, I better rewire my system. July 13, Your article was the only one that i found on the web with clear and simple instructions Cheers Nicholas Sydney Australia.

February 6, This article was very helpful, as well as were the critical comments. Faced with criticism gentlemanly criticism, but criticism none-the-less , he remained humble and in the end learned something himself. February 16, 2: I am a big believer in having a bright red rear foglight on my autos. Common in Europe as both factory equipment on some makes of cars and after market on others.

Hella USA used to import a couple different rear fog lights and a really neat switch that could allow just the rear fog light to operate, allow just the front fog lights to operate and a combo of both. Alas, no longer availiable at least in the USA. Wired to work separately or with front factory fogs.

How to Wire a Relay for Off-Road LED Lights

The PIA unit is somewhat expensive but far less than having some idiot smack you in the rear in foggy weather because he was driving too fast for conditons. May 7, 5: Do I have to cut in to the wires at the head lamps to make the driving lights work? April 16, 5: Hello, I want to wire 5 LED spot lights to one switch, each light has puts out 35 watts and my jeep puts out Can I do this using one switch? How many fuses do I need and what size?

Can all 5 use the same relay? Do u have a diagram for this application? What size Guage do I need? Can I connect all 5 red wires together then run one single red wire to the engine compartment? Same for the black wires? May 14, May 15, 4: March 11, 7: HI, instead of a 3 prong switch can i use 4 prong switch for spot lights if so can you tell me what prongs i use for the wires. April 1, My hat is off to the author very nice accepting constructive criticism and learning like the rest of us.

Also thanks to the person correcting or adding additional information, many would have gone and said nothing. Install the fog lights in the desired location with the provisions in the kit. Install a piece of gauge wire with a yellow butt connector to the black ground wire at the fog light and attach it to a good ground on the frame with the yellow oval connectors. Disconnect the negative terminal on the battery. Attach the relay in an easy access location as close as possible to the fuse and relay center on the driver's side fenderwell. Attach another piece of gauge wire from the relay to the fog lights using a yellow female blade at the relay and t-ing both fog lights into a yellow butt connector.


  1. How To Wire Fog And Driving Lights Harness Wiring Diagram.
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  5. How To Wire Fog And Driving Lights;

Attach a gauge wire with a blue female blade to the ground side of the relay and to a good ground using the blue oval connector. Attach a gauge wire from the last terminal on the relay through the firewall to the switch using the blue female blades. Locate a straight blade terminal on the driver's side fuse block that has power only when the lights are on. Use the voltmeter to check for power. The harness from the headlight switch can also be used. Once a terminal or wire is found that has power only when the lights are on, attach a gauge wire from there to the switch.

Reconnect the battery negative terminal. Now the fog lights will only turn on when the headlights are on. They can be turned on or off as long as the main lights are on. When the headlights are off, so are the fog lights. Drill and assorted drill bits Phillips screwdriver Wire crimping tool Set of wrenches Voltmeter 4 standard yellow female blade connectors 2 yellow oval butt connectors 3 yellow butt connectors 2 blue oval connectors 2 blue female blades 2 blue butt connectors. Open the hood and locate the backs of the fog lights in the front of the engine bay.

Insert a narrow tool like a screwdriver through the hole that's adjacent to the fog light housing.