S14 Isolated fog light circuit with OEM switch (56K is warned)

[spooled240]

Please note: On a 1997-98 s14 there are two relays in the fog light circuit, a black relay in the fuse box under the hood and and a blue relay located in the driver's side(left side) kick panel. On the 1995-96 s14 there is only one relay in the fog light circuit, a blue relay located in the fuse box in the engine bay however, both models of s14 use the same fuse and wire colors. For 1995-96 s14, you will follow the same procedure for the blue relay in the fuse box under the hood. -Courtesy of IDRFT95S14

This write-up will tell you how to have your fog lights on by themselves using the factory fog light switch on s14's. Looking at the factory wiring diagram, I figured out a simple way to make this work.

Difficulty: **Time: 30 minutesTools: Small flat blade screw driver, wire cutters, needle nose pliers, wire insulation strippers, universal tool(see below), soldering gun (optional, depending on your choice of wire connections)supplies: small gauge wire(length depends on your choice of power source), 1 female spade connector, solder(only if using soldering gun)

As many of you s14 guys with factory fog lights know, the stock circuit allows you to only turn your fog lights on when your headlights are on. The fogs also automatically turn off when the high beams are on. Some of us want to turn the fog lights on by themselves when it is dusk/dawn and plus it looks cool!

Here is a wiring diagram I drew on MSpaint just to show you guys what we are doing here:Like the picture says, we are going to a constant supply of 12v power to the fog lights regardless of the headlight switch being on or off.

Again, this setup will allow you to use your factory fog light switch with the factory relay!

1) Find the fog light relay behind the driver's side(left side) kick panel near the fuse box. This relay is blue.Remove this relay using a small flat blade screwdriver to pry the clip open, be careful not to break it.

2) The red wire with the blue stripe is the wire that we want to connect a constant 12v power source to. Now it is up to your whether you want to cut this wire, or remove it from the relay socket. You can simply cut this wire then connect or solder it to constant 12v so you won't have to deal with removing it from the relay socket. Let me warn you that removing the wire from the socket can be time consuming. I chose to remove it from the relay socket just to leave the factory fog light wire untouched.

Removing the wire from the socket is a little bit harder but it's not bad if you know what you're doing.

So with your small flat blade screw driver, remove the white bottom piece of the relay socket and slide it down the wires, this will make it easier to remove the wire from the socket.Now I have this tool that has small flat pins around it to remove wires from the relay socket, it can be found at most electrical stores. But basically you will need a small pin of some sort like this:

Insert the small flat blade down through the top of the relay socket and pry the small plastic clip towards the center of the socket and try to push the wire down through the socket.

^^That is the hardest part, so take your time^^

After you push the wire out, slide it out entirely out through the white plastic piece, tape the wire and put it aside. Make sure you tape it good.

3) Now get some wire and connect a female spade connector on the end of it. Use the wire strippers to strip the insulation back and use the needle nose to crimp the connection on.

Now slide the new wire through the white plastic piece and into the relay socket itself. The female spade connector should snap in place.

Now you can plug the relay back in and connect the white plastic piece to the bottom of the relay socket.

4) It is your choice where you tap into 12v power, but keep in mind that whatever source you tap into, it is a constant 12v even without the headlights being on. I tapped into some unused wires under my shift boot area. You can also tap into the cigarette light if you choose. Using a volt meter, you can find many sources of constant 12v.

After you find your source of power, you will notice that you can turn your fog lights on with your OEM fog light switch regardless of the headlights being on!

Since this setup bypasses the headlight circuit that turns off the fogs when the high beams are on, you can remove the black fog light relay in the engine bay fuse box, since it is not used anymore.



**Make sure you remember to turn them off before leaving your car, they are not included in the headlight circuit which will not sound the beeper if they are left on.**

Good Luck

Modified by spooled240 at 7:05 PM 10/21/2008

Modified by spooled240 at 10:09 AM 11/6/2008
Modified by spooled240 at 10:10 AM 11/6/2008

[mrgreeneyes]

word. good write up my friend. always pioneering some cool stuff. i did this mod on my old celica (never ever buy one)... and i had it working on my fogs on this 240 but i ended up removing the fogs for a cleaner look

[lancet913]

I've wondered how to do this ever since I bought my zenki. Never looked in to it but I will be doing this mod over the weekend. Thanks man!

[spooled240]

thanks guys, I've always wanted to do this ever since I got my fogs on..it's annoying how the stock setup is IMO.

if you guys got questions or problems just ask me on this thread, I'm sure it will help many others too =]

[brizanden]

added to favorites.

[spooled240]

added to favorites.

who? me?!! haha

I was talking to you about this the other night right?

[brizanden]

na ugh we were talking about gauge light bulbs and how u shoulda got piaa to be ultra jdm cool lol.

[spooled240]

that must've been sketchy then

[jr_ss]

Good write up... Only thing I see would be a problem, is people not shutting them off when they exit because they forget they are on.

There is another way to do this though, so that they will turn on and off with your factory headlight switch, but your corner/running lights will be one with them as well...

All you need to do is get a relay, run a wire from the power feed of the fog lights to one side of the relay, add 12v constant, ground, and a switched source which would be your corner lights. This make your fogs come on with your corner/running lights, keeps them on when your high beams are switched on as well...

Good Job man...

[spooled240]

yeah i've seen that setup but you can never turn your parking lights on by themselves since the fogs will be on with them.

People unplug that beeper anyway, including myself cuz it is annoying.

[spooled240]

bump no love? :*(

I thought this was a popular mod

[RCA]

i likes it...You needs a custom title...

[BoBa524]

why not get the power from a wire that only has voltage with the key on? that way the lights wont stay on when you take the key out.

[spooled240]

you can do that, like tap into the accessory wires that supply power to the radio and whatnot.

[IDRFT95S14]

is the fog light relay the same color on a zenki? all i see is four relays three blue and a brown one .there is also a 5th apart from the rest its black and has the same blue and red blue stripped wire ill post a pick soon

[IDRFT95S14]

here is a pick of what it looks like down thereand this one is the other relay the one im pointing to
Modified by IDRFT95S14 at 8:03 PM 11/3/2008

[spooled240]

is the fog light relay the same color on a zenki? all i see is four relays three blue and a brown one .there is also a 5th apart from the rest its black and has the same blue and red blue stripped wire ill post a pick soon

I looked at the full service manual for a 1995 s14 and the wiring diagram for the fog lights is a little different, but it is in the same layout where the fog light relay gets power from the headlight circuit. It looks like the zenki uses only one fog light relay. The fog lamp relay that you are going to make the necessary changes to is the same blue fuse with the pinout numbers 1,2, 3 and 5.

According to the FSM, the pinouts are:1:Green w/ orange stripe2:Red w/ blue stripe <--this is the wire that you will modify3:Orange5:Orange w/ black (zomg! halloween colors!)

All you are going to have to do is do the same thing that I descibed in my first post to the -->RED WIRE W/ BLUE STRIPE<-- in the number 2 pin. You can actually see the numbers of the pin at the bottom of the relay to make sure and since the relay can only go on the socket one way, you can't get mixed up. GL

[spooled240]

hmm that's weird, my fog light socket was just dangling there next to that black relay right there.

Try this-turn your fog lights on and off. You should here a "clicking" noise whenever they come on and off. This is the relay connecting and disconnecting the circuit. See if the noise is coming from that location and find that relay.

[IDRFT95S14]

i found the clicking but its coming from the underhood fuse box its this one
Modified by IDRFT95S14 at 8:04 PM 11/3/2008

[IDRFT95S14]

if this is the one then finding a source of power should be easier right

[IDRFT95S14]

ok i finished doing the mod its the same thing, only you do it on the front fuse box and its the same wire you said earlier also its close to the batteryso power source is a piece of cakegood mod thanks

[spooled240]

ah i see, zenki's are a little different. thanks for clarifying

[IDRFT95S14]

Please note: On a 1997-98 s14 there are two relays in the fog light circuit, a black relay in the fuse box under the hood and and a blue relay located in the driver's side(left side) kick panel. On the 1995-96 s14 there is only one relay in the fog light circuit, a blue relay located in the fuse box in the engine bay however, both models of s14 use the same fuse and wire colors. For 1995-96 s14, you will follow the same procedure for the blue relay in the fuse box under the hood. -Courtesy of IDRFT95S14

thanks bro ,sorry for bringing the thread back but its damn nice mod

[spooled240]

no problem, lmk if you have any questions/problems

[woah]

i hooked mines up too the remote wire behind my deck. turns the fogs right off when i remove my key. hey btw did any of you guys paint your fogs?

[spooled240]

nice, that's a good idea

I didn't paint mine, I just have some yellow nokya bulbs. I'm thinking of getting some yellow overlays for them for protection/more yellow/more JDM/more panty-dropping ha j/k

[woah]

o yeah? where can you get the overlays at? Im also thinking about getting hids for the fogs too.

[spooled240]

i'm looking at some universal lamin-x sheets on ebay.

[Shusaka]

IDRFT, do you have a similar write up on this install for your zenki, im in the process of doing mine and it seems like much more of a PITA than it sounds like it should be and im stuck

[stack]

good write up, did this today