Fog Light Question, Running the fog lights to turn on with the parking lights Options

[str8thugginit4ya]

Hey guys,

I have the 96-99 fog lights already installed in my car. I was just wondering how can I run them to turn on when you just have the parking lights on? Right now, it only turns on when I put the headlights on. Oh, and I have the OEM light switch for the fog lights and I'm not thinking of running another aftermarket switch just for this.

[richee3]

I know of a how-to to do this, if you want me to get it for you. The catch is, the fog lights would be on when the parking lights are on, no matter what. I'm sure you could install a new switch yourself and get around that, but it's a fairly simple mod if you want me to find the link. I've been planning on doing it to my car so my fogs are on all the time, even with my brights.

[richee3]

Sorry this took so long. It slipped my mind. Here is the link to that fog light modification article. This was written for a 5th gen but will apply to our cars also.

http://www.toyotacelicaonline.com/fogs.htm

[Jaws4God]

do the 94-95 celicas have that relay already?

[trdproven]

wire it directly if you want to be able to turn on the fogs by itself seperate from the low beams.

[blu94gt]

wire it directly if you want to be able to turn on the fogs by itself seperate from the low beams.

Just wire the power to the fogs directly from a key-on 12v source instead of from the headlights. Right now they get the power to the relay from the headlight switch.

[Fastbird]

Let me look at the wiring for the car. There might be a way to simply move the trigger for the fog lights from the headlight circuitry to the parking lamp circuitry. I'm going to be in there this weekend so I'll try to remember to take a look.

[lagos]

Hey guys,

I have the 96-99 fog lights already installed in my car. I was just wondering how can I run them to turn on when you just have the parking lights on? Right now, it only turns on when I put the headlights on. Oh, and I have the OEM light switch for the fog lights and I'm not thinking of running another aftermarket switch just for this.

You might be able to Tee in a wire from the side markers to the fogs. That way when the side markers turn on, they will power the fogs.

This post has been edited by lagos: Feb 11, 2009 - 5:11 PM

[trdproven]

I would not rob the headlight wiring of anything, my friend caused more than 500 dollars of damage when he did that, just run it directly to the battery using an OEM switch I prefer, and thats what I did.

[malpaso]

It is possible to turn fogs on anytime you want
- with ignition on
- with parking lights on
- with low beams on
- with high beams on
- even with turn signals

only you need is:
a) remove foglight relay



b) plug pair of wires instead of that



c) other end connect to "switching mechanism" (for you it means find where switch contacts for parking lights are... so just find two correct wires on multi-switch for headlights and connect it there)



no cutting, no irreversible processes at all...

[KAOS]

c) other end connect to "switching mechanism" (for you it means find where switch contacts for parking lights are... so just find two correct wires on multi-switch for headlights and connect it there)
b) plug pair of wires instead of that

Are these the (+)'s from both the fogs?

This post has been edited by KAOS: Feb 13, 2009 - 11:55 AM

[richee3]

Malpaso, I'm gonna do that to my car when I get a chance! But because I'm a wiring noob... I have to ask the dumb question of the day. What did you use to plug the wires into where the relay was?

[KAOS]

Malpaso, I'm gonna do that to my car when I get a chance! But because I'm a wiring noob... I have to ask the dumb question of the day. What did you use to plug the wires into where the relay was?

You should be able to get away with using this:

[malpaso]

c) other end connect to "switching mechanism" (for you it means find where switch contacts for parking lights are... so just find two correct wires on multi-switch for headlights and connect it there)
b) plug pair of wires instead of that

Are these the (+)'s from both the fogs?

relay it self has four wires. two are "switching" ones (when signal comes they just do the job of the switch) and other two are just "connecting" (those you connect together... connected = fogs are on, not connected = fogs are off). I'm using those "connecting" ones. If you make shortcut between those two wires in the picture your foglights will be permanently on.

Malpaso, I'm gonna do that to my car when I get a chance! But because I'm a wiring noob... I have to ask the dumb question of the day. What did you use to plug the wires into where the relay was?

You should be able to get away with using this:

exactly that's what I have used...

[KAOS]

relay it self has four wires. two are "switching" ones (when signal comes they just do the job of the switch) and other two are just "connecting" (those you connect together... connected = fogs are on, not connected = fogs are off). I'm using those "connecting" ones. If you make shortcut between those two wires in the picture your foglights will be permanently on.

So if I don't have the foglight switch in the cab of the car; but I have the relay (which I'm not sure if I do or don't, I haven't looked lately) would wiring them like this work for me?

You wouldn't happen to have a wiring diagram of what you've got done in this picture, would you Malpaso?

[malpaso]

So if I don't have the foglight switch in the cab of the car; but I have the relay (which I'm not sure if I do or don't, I haven't looked lately) would wiring them like this work for me?

yes. I have done that already once as well . If you have relay only you need is provide "switching signal" to have relay on-state to switch on lamps.

You wouldn't happen to have a wiring diagram of what you've got done in this picture, would you Malpaso?

sorry I don't... but I can try to draw something

[KAOS]

So if I don't have the foglight switch in the cab of the car; but I have the relay (which I'm not sure if I do or don't, I haven't looked lately) would wiring them like this work for me?

yes. I have done that already once as well . If you have relay only you need is provide "switching signal" to have relay on-state to switch on lamps.

You wouldn't happen to have a wiring diagram of what you've got done in this picture, would you Malpaso?

sorry I don't... but I can try to draw something

As always:

[malpaso]

You wouldn't happen to have a wiring diagram of what you've got done in this picture, would you Malpaso?

So... I have found one already created by Dustin:



and just to match my terms wires of relay I have talked about:

"switching" ones: #85, #86
"connecting" ones: #30, #87

Wires in the picture below are using pins #87 and #30 (according to picture above). That's why when you make shortcut between those two wires foglights will be permanently on...



...and just to make info complete here is description of OEM relay (lower one in the picture of course ) taken from Toyota's repair manual. You can find out which pin is what

[trdproven]

is that from the celicatech manual or a toyota shop manual?

[MercuryFree]

As an aside, is this required only on USDM celicas? As my JDM one has said capability on the stock stitch from factory.

[malpaso]

is that from the celicatech manual or a toyota shop manual?

I have that from some special electrician's manual I saw at authorized Toyota service station. Something what Toyota distribute only for own service stations...

[KAOS]

You wouldn't happen to have a wiring diagram of what you've got done in this picture, would you Malpaso?

So... I have found one already created by Dustin:

and just to match my terms wires of relay I have talked about:

"switching" ones: #85, #86
"connecting" ones: #30, #87

Wires in the picture below are using pins #87 and #30 (according to picture above). That's why when you make shortcut between those two wires foglights will be permanently on...

...and just to make info complete here is description of OEM relay (lower one in the picture of course ) taken from Toyota's repair manual. You can find out which pin is what

This is perfect; make sure you've put those pictures in the "6GC HOW TO" Photobucket account - and if there isn't already a sticky for this, I NOMINATE IT TO BECOME A STICKY!

This post has been edited by KAOS: Feb 18, 2009 - 9:31 AM

[96stgreendemon]

ok besides from bringing this thread back from the dead..... ok i have the stock fogs, not 100% sure where this relay is or for that matter how to get to if if in fact my car is actually already set up for fogs, can anyone help me?

[richee3]

The relay is behind your fuse box. Lay down in the floor and look up and you should see it. If your car is a '96, you should already have the wiring run for the fogs, but I'm not sure about the relay. I know you'll have to install a switch. There's a good thread for that.

Edit: Found the link.

This post has been edited by richee3: Nov 17, 2009 - 11:43 AM

[thymeclock]

I’m new to this list. I know I'm bringing this topic back from the dead but I hope you'll understand why. I have a ’99 Celica and would like my fog lights to be powered up with the parking lights, not in the headlight circuit as Toyota designed it.

I tried to utilize the information and the photos in this thread to modify it. Unfortunately, the directions are not applicable to the 1999 model year. The blue relay shown in the photo looks the same as the one on my car, but on mine it is a starter relay. (It says so right on the relay and the car won’t start without it.)

Here’s a photo of what my fuse & relay box looks like: http://i875.photobucket.com/albums/ab316/t...k/99FuseBox.jpg


There are several other relays but I haven’t a clue as to which relay might be for the fog lights. If anyone knows how to do this, I’d appreciate the help.

[siberhusky0]

Go to CelicaTech and do the search. You cut one wire to the relay and that goes to a switched (ign on) 12v source. Find that with a multimeter and splice in. You don't need a separate switch. You can determine which relay by turning on headlights/fogs. Turn the fog switch off & on, listen for the click. Put you finger on the relay to be sure you have the right one. More than likely the fog relay wires are the same color between 5th & 6th gen. Check the write up against the manual to be sure.

[solidxsnake]

One thing, before you find the fog relay and do what Malpaso posted prior. I would connect the #30 and #87 wires to the parking-light relay and keep the high-current circuit (foglights, #85, #86) separate from the low-current switch (fog switch, #30, #87) circuit. Can't say you'd surely have issues directly switching the lights, but I'm not sure just how much current the foglight switch can handle.

Back on topic, you're looking at the wrong fuse/relay box. The one with the fog relay is under the driver-side kick panel. Jump into your driver's seat, reach down to the left of the clutch/brake pedal and you'll feel a plastic nut. Unscrew it, then you'll need to pull off some of the door trim. Pull all the trim out and then pull the kick-panel off. You'll see a bunch of wires and a jumper block or two. The foglight relay is at the top, it's hard to see/get to because there's such little room to work with. You may need to pull the lower-dash under the steering wheel as well. There's 4 screws to get it all off I believe.

[siberhusky0]

One wire, one splice. Done. Your not bypassing the the relay, or doing anything to the switch. The switch sends 12v to the relay, the relay sends 12v to the fogs, fogs light up. ONLY thing that has changed is the fogs come on when you turn on the fog switch. The reason why is you changed to a 12v source with the ign. on, instead of it getting the 12v source that is available ONLY with low beam lights on.

[solidxsnake]

One wire, one splice. Done. Your not bypassing the the relay, or doing anything to the switch. The switch sends 12v to the relay, the relay sends 12v to the fogs, fogs light up. ONLY thing that has changed is the fogs come on when you turn on the fog switch. The reason why is you changed to a 12v source with the ign. on, instead of it getting the 12v source that is available ONLY with low beam lights on.

This. If this works, by all means do it, it's the easiest method of getting control over your fogs.

I did this in my current car ('02 Corolla S) and it allows me control over the fog relay. I can hear the relay click at any point if my ignition is on. However, the fogs only turn on when the parking lights or lows/highs are on (from the factory, they ONLY turn on with the lows, not with the parking lights or the highbeams). This is because the foglight power (the high-current circuit, between the #85 and #86 contacts) is only receiving +12v when the TAIL relay is switched on, which only happens when the light switch is on parking lights or lows/highs. It's real annoying.

[thymeclock]

One wire, one splice. Done. Your not bypassing the the relay, or doing anything to the switch. The switch sends 12v to the relay, the relay sends 12v to the fogs, fogs light up. ONLY thing that has changed is the fogs come on when you turn on the fog switch. The reason why is you changed to a 12v source with the ign. on, instead of it getting the 12v source that is available ONLY with low beam lights on.

Now that I recently had time to examine it, I understand you fully and appreciate the advice. By listening and feeling it click I know which relay powers the parking lights (one on one board) and which relay powers the fog lights (one on a different board). You can call me lazy - but I'd like to know by color code which wire it is that sends power from the parking light switch when it is turned on. If I can locate that and use the parking light feed instead of the headlight feed, that's the way I want to do the change. Taking both those under-dash panels down to locate the one correct wire is a real PITA, and short of that it's tough, as there must be at least a hundred wires there. I can pick probe the wires to verify the switched hot wire feed coming from the parking light switch. Does anyone have a wiring diagram that will tell which wire it is?

Oh, and it would also help to know which wire is the headlight switch feed that is currently powering that fog relay.

This post has been edited by thymeclock: Jun 11, 2010 - 9:22 PM