Installing factory Fog Light Switch

[Ride Em Bronco]

Not sure about aftermarket, but you can buy the factory harness though.

Problem is, I don’t think the wiring is even going up to the bumper connector for the front harness. I think it stops short in a large connector above the LF fender liner.

There was a post a while ago about someone extending it from that large connector and making it work, not sure I’d be able to find it again though.

I'm thinking now that the best option for me may be to connect the fog lights directly to the low beam and not bother with any switch - factory or otherwise. I know that I will need to get a professional to do this - but wondering if I need to buy the factory harness, any piglets, etc. And would this still make it necessary to reprogram with Forscan once it is done. Here is what I found:

• To install fog lights and have them work with your low beam headlights using a relay, you'll need to tap into the low beam headlight circuit and use a relay to control the fog lights. This setup ensures the fog lights only turn on when the low beams are on and off when they are off.
  
  
  Here's how the wiring generally works:
  1. 1. Tap into the low beam circuit:
     Find the low beam headlight wire (usually red or blue, depending on your vehicle) and use a wire tap or splice to connect it to one side of the relay coil.
• 
  
• 2. Relay wiring:
  • Connect the relay's power input (usually terminal 30) to a 10-amp inline fuse and then to a positive power source, like the battery or a dedicated fuse box location.
• 
  
• Connect the relay's ground (usually terminal 85) to a vehicle's groundpoint.
  
  
• 
  
• Connect the relay's output (usually terminal 87)to one side of your fog light's positive wire.
  
  
• 3. Fog light wiring:
  • Connect the other side of your fog light's positive wire to the relay's output (87).
• 
  
• Connect your fog light's ground wire to a vehicle's groundpoint.
  
  
• 4. Switch (optional):
  You can add a switch in series with the relay's coil if you want the option to turn the fog lights on and off independently of the headlights.
• 
  
• 
  
  
• 
  
• 5. Test and adjust:
  After wiring, test the fog lights to ensure they turn on and off with the low beams and that the wiring is secure.
  
  
• 
  
  
• Important considerations:
  • Relay type: Use a 4-pin relay, which has the necessary terminals for this application.
• 
  
• Fuse: Always use a fuse to protect the fog light circuit.
  
  
• 
  
• Vehicle wiring: Consult your vehicle's wiring diagram or a professional for specific wire colors and locations.
  
  
• 
  
• Legal requirements: Be aware of local regulations regarding fog light use

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[Ducati1098]

I'm thinking now that the best option for me may be to connect the fog lights directly to the low beam and not bother with any switch - factory or otherwise. I know that I will need to get a professional to do this - but wondering if I need to buy the factory harness, any piglets, etc. And would this still make it necessary to reprogram with Forscan once it is done. Here is what I found:

• To install fog lights and have them work with your low beam headlights using a relay, you'll need to tap into the low beam headlight circuit and use a relay to control the fog lights. This setup ensures the fog lights only turn on when the low beams are on and off when they are off.
  
  
  Here's how the wiring generally works:
  1. 1. Tap into the low beam circuit:
     Find the low beam headlight wire (usually red or blue, depending on your vehicle) and use a wire tap or splice to connect it to one side of the relay coil.
• 
  
• 2. Relay wiring:
  • Connect the relay's power input (usually terminal 30) to a 10-amp inline fuse and then to a positive power source, like the battery or a dedicated fuse box location.
• 
  
• Connect the relay's ground (usually terminal 85) to a vehicle's groundpoint.
  
  
• 
  
• Connect the relay's output (usually terminal 87)to one side of your fog light's positive wire.
  
  
• 3. Fog light wiring:
  • Connect the other side of your fog light's positive wire to the relay's output (87).
• 
  
• Connect your fog light's ground wire to a vehicle's groundpoint.
  
  
• 4. Switch (optional):
  You can add a switch in series with the relay's coil if you want the option to turn the fog lights on and off independently of the headlights.
• 
  
• 
  
  
• 
  
• 5. Test and adjust:
  After wiring, test the fog lights to ensure they turn on and off with the low beams and that the wiring is secure.
  
  
• 
  
  
• Important considerations:
  • Relay type: Use a 4-pin relay, which has the necessary terminals for this application.
• 
  
• Fuse: Always use a fuse to protect the fog light circuit.
  
  
• 
  
• Vehicle wiring: Consult your vehicle's wiring diagram or a professional for specific wire colors and locations.
  
  
• 
  
• Legal requirements: Be aware of local regulations regarding fog light use

I mean there’s a bunch of different ways you can do it. All depends on how you want it to work.
I used the factory fog light circuits because it was the easiest method for me.
The method you posted would probably work fine, just seems more complicated for a less clean way of doing it.

 

[Ride Em Bronco]

I mean there’s a bunch of different ways you can do it. All depends on how you want it to work.
I used the factory fog light circuits because it was the easiest method for me.
The method you posted would probably work fine, just seems more complicated for a less clean way of doing it.

In my case I don't have the factory fog light circuits so I thought this would be the easiest method for me. And I was hoping that since it does not require using a switch and instead uses a relay with the low beam headlights possibly Forscan will not need to be reprogrammed?

 

[Ducati1098]

In my case I don't have the factory fog light circuits so I thought this would be the easiest method for me. And I was hoping that since it does not require using a switch and instead uses a relay with the low beam headlights possibly Forscan will not need to be reprogrammed?

Yes you won’t need forscan, but that’s the easiest part.
You’ll still need some type of harness or wiring for the lights depending on what you already have.

 

[Ride Em Bronco]

Yes you won’t need forscan, but that’s the easiest part.
You’ll still need some type of harness or wiring for the lights depending on what you already have.

I was planning on purchasing the factory harness like you suggested - but since it runs short above the LF fender line I will need some sort of harness or wiring or piglet for making the low beam connection. This is when I will have to find a local professional who hopefully can get whatever else is needed and then do what needs to be done. Thanks for all the info.

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