sorry to revive an old topic. this is by far, the best tutorial I have found on installing fog lights.

I guess i have a few specific questions. did you splice your wires at the front, near the headlight and run wires back to the relay, or did you splice near the relay?

Also, the fused power source. Where did that come from? (I'm a newb at this stuff)

 

i ran the wires about 3 or 4 inches back from the headlight plug and then up to the relay mounting location. And the fused power source pin 30 on your relay is directly from the (+) side of your battery. Remember to put the fuse very close to the connection on the batt.

 

Never apologize for using the search, and bringing up an old thread.
That is the reason threads are kept and why every thread to day 1 is still on the site, just like this thread, there is vast amount of good content that is still applicable today as it was the day the thread was made.

 

thanks!

I actually use the term 'site:f150online.com <keywords>' in google, it seems to bring up a bunch more relavent posts.

 

I have just done this and it works fine. I have the OEM fog switch and want it to be operational. Do you have the pin location on the switch and where can I run the cable?

 

On the back of the switch there is 3 plugs, the one in the middle has a THIN yellow wire and a thicker (about medium size) white with a black stripe(may look a little tanish due to ageing, Mine did). that is what you tap into for the signal wires (85 & 86) of the relay. I had some trailer wiring laying around so I used that to run to a relay I zip tied next to the fuse box in the engine compartment. relay pin 30 goes to a fused positive source (ran mine directly to the battery) and 87 goes to fogs, 87a just cap off so It doesn't short anything, if you are using a relay plug (found them on ebay with wire leads to connect to) then just remove the 87a wire and your good.

 

I just did some experimenting and pulled the switch from the dash and found the pin for the fogs. Its the second from the left on the bottom row. I wired a hot ( + ) lead directly from the switch to the fogs and voila, they worked. All the functions with the automatic headlights worked also. Should I use a relay on this? Or should I rely on the factory switch? Or should I use a fuse on the hot wire?

 

I've never had any problems with not using a fuse (knock on wood) on a hot wire but it is always a good idea and I've gotten into doing such in alot of my recent wiring expeditions. The way the stock setup has it is those wires behind the switch go to a relay in the fusebox which then turns on the lights straight from the battery in the vehicles wiring but if you have to do the wiring yourself (no factory plugs behind the bumper) then I would think that it wouild be a safe idea to go the same route as the foctory and use a relay, thay way you pull the power directly from the battery and not from a lower capable wire in the dash.

 

I am pulling the power directly fom the light / fog switch. So that means I am getting the power from a relay that powers that switch. I have to actually pull the light switch out to make them work. Just as I would if it was factory installed. Do I have to fuse in or put a relay in, that is the question.

 

just for referance here is the topics I used when i installed my lights.
https://www.f150online.com/forums/19...ind-grill.html
https://www.f150online.com/forums/ar...witch-mod.html

I don't know if they'll help you answer any questions you have but if not, just ask here and I'll see if I can help.

 

I don't know offhand what size fuse in used for the switch to know if it'll handle the power needed for the lights or not, if you use a relay in the setup that Fairlaner used or I used it will work exactly like stock where you pull the headlight switch out to turn the lights on and push it in to turn them off.

If they are working like you want I guess it is fine , However, I myself would rather side with the side of caution and use a relay.

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if you do decide to go the route of installing relays, let me know a couple of things and I can do a crude drawing of how to wire the relays so it works.

What I need to know:
1. Do you plan on doing the "Bambi mod"
2. Do you have remote entry (stock or aftermarket)
3. Do you have/Plan to have HIDs in your lights
3b. If no, Do you mind the headlights flashing with you keyles(if you have it) or no?? (side effect of Bambi mod that can be fixed)
4. when do you want the fogs to be able to be activated?? with lows only, Highs and lows, or parking-highs-and lows?

 

The color codes changes a bit from the 97-03 MY

This is the diagram for the fog lamps.



The wire that you are going to use to the relay is the White w/ Black stripe wire. This is what powers the coil on the relay for the fog lamps. This can be an additional relay, so no issue there.

Do not try to power the fog lamps directly from the switch, it will not last too long.

 

SSCULLY, is this the diagram for the 2004-2008?

 

Yes, this is the 2004-2008 MY fog lamp diagram. This is why I said be careful with the suggestions based on a 97-03 MY.