Schematic for connecting fog lights to the high beams.

[koda6966]

I realized the other day that my fog lights are bright as hell, I'm assuming this will work, but I'd like some more input on it before I start wiring it up.

Basically I want my fog lights to be able to come on with my high beams. I have two sets of fogs, one installed already and another waiting to go on in place of them. Once the new ones go in the old, smaller ones, will be relocated.

I looked up some relay schematics and I came up with one for a 4pin relay. This is the contact designation.

Pin# ---- Designation.
30-------+12v DC
85-------Ground
86-------Coil Feed.
87------- Load

Using this relay, I drafted up a schematic for the wiring. Basically I wanted the toggle switches to be able to turn on the lights still, but I also want them to come on with the high beams whenever I turn them on. Unfortunately, I couldn't run separate feeds with this relay. As opposed to running a separate relay I decided to step up the feeder fuse to the lights and run them off the same fuse.

This is my schematic of what I'm assuming the stock wiring looks like.

And this is my schematic of what I plan on having the new wiring look like.

Questions, comments, opinions?

 

[4x4junkie]

What is the "1CR" and "FR" in the circle in your 2nd drawing?



What I did on mine was wire the center contact of a 3-position switch (SPDT center-off type) to the coil terminal of a standard relay (opposite side of relay coil goes to ground).
One side of the switch goes to 12VDC (always on), the other side of the switch goes to the feed wire to the headlights.
When the switch is in the center, everything is off.
Switched one way connects 12V to the relay coil for always on.
Switched the other way feeds power to the relay coil from the headlamp feed wire (making the lights switch on & off with the high beams).


That help at all? I can draw up a schematic of it if you want...




Edit:
Is "FR" is the coil of the foglight relay, and 1CR is the contacts? (judging by the numbers there)
That setup should work, however you're putting all the electrical current directly onto your switch contacts when you switch it to on-always with that setup (rather than the current going through the relay's contacts).

 

[koda6966]

Sorry, I didn't label anything too well. I was distracted while I was drafting that up.

The FR is the fog light relay contactor and the 1-CR's should have been 1FR's, and they are the normally open contacts for the relay.

I noticed that it would be running to the switches right after I posted. I'll have to revise it using a mix of what I have and what you suggested and see what I come out with.

 

[strvger]

you do realize that high beams will completely negate the effectiveness of the fog lights. if they are driving lights, fine, but high beams in a fog are blinding, hence the need for fog lights that focus their light down close so you can see the lane markers and "fog line" painted on the road.

 

[02RangerXLT]

you do realize that high beams will completely negate the effectiveness of the fog lights. if they are driving lights, fine, but high beams in a fog are blinding, hence the need for fog lights that focus their light down close so you can see the lane markers and "fog line" painted on the road.

High beams provide light further in front of you, fogs provide it close in front of you, how do they negate each other? Having both on would create an even plane of light.

Frankly, I've never used my fog lights for driving in "fog" or other crap like that. They don't do any better than my low beams do.

 

[strvger]

if you ever turn your bright lights on in a dense fog, all it does is reflect it right back into your eyes. the light reflects off the water droplets in the fog. that is precisely why fog lights are aimed low and close to your vehicle... so you can see lane and fog lines.

 

[koda6966]

My fog lights negate my fog lights.

My lower ones are aimed towards the sides of the road and my higher ones are aimed forward. Hence why I don't want them on all the time, only with the brights. Otherwise I'm blinding everybody.

I guess you'd have to call them deer lights since I use them to see deer more than I do fog.

 

[koda6966]

strvger, I was going to avoid what you were saying anyway by wiring a separate toggle in to control the lights as well as the high beam switch.

 

[koda6966]

In order for me to run each light to a toggle I will need to run the full power off that toggle. No way to avoid it other than to use multiple relays. I may end up doing this in the future if I add more lighting. This way I can also avoid having to step up the fuse rating and wire gauge.

I'll post the schematic up when I finish it..

 

[koda6966]

Here's the new one.

 

[4x4junkie]

This is how I have mine set up.
I use this type of setup for my fog lights (on w/low beam), driving lights (on w/hi-beam),
and again for my auxiliary reverse lights.

Looking at it more, I think you might actually have the same thing there, just drawn a little differently is all.



.

 

[--weezl--]

i skipped a lot of the posts, but i know there is a mod on another forum, which i prefer not to name, that moves one wire, which allows the fog lights to be used whenever...

also, there may be laws in your area for when your driving lights and fog lights can be used, in my area, fog lights legally must turn off automatically, when you turn the highbeams on, and driving lights must only work with the highbeams

 

[02RangerXLT]

i skipped a lot of the posts, but i know there is a mod on another forum, which i prefer not to name, that moves one wire, which allows the fog lights to be used whenever...

also, there may be laws in your area for when your driving lights and fog lights can be used, in my area, fog lights legally must turn off automatically, when you turn the highbeams on, and driving lights must only work with the highbeams

On certain trucks you can also just bend the pin of a relay...

See here:

01-03: http://www.fordrangerforum.com/how-submissions/9191-how-fog-light-mod-2001-2003-a.html

And another with a different method but same idea:

04-06: http://www.fordrangerforum.com/how-submissions/9151-how-foglight-mod-2004-2006-a.html

Granted, these are not the same year trucks you have, but the idea is the same...

 

[koda6966]

That looks about the same, just mine is drawn up differently. I just noticed I kept using earth grounds instead of chassis grounds, oops.