I am putting the S5 fog lights onto my S5 GXL. I can not seem to get them to work. I thought I read somewhere that they only come on under certain conditions? Here is where I'm at...

When I flip the switch, I hear the relay in the front of the car click.
I have tried multiple switches.
When I put 12V directly to the lights, they come on.
The fuse in the cabin is good.

Any other ideas? I am using all factory wiring/electronics. Thanks.

 

The headlights have to be on.

 

You might as well just wire them separate

 

the low beam relay powers the fog light relay, which is a little lame, cause its hard to get around that if say you wanted the fog lights to be on with the parking lights...

unless you're in canada, then its much easier

 

I turned the headlights on and the fog lights still did not come on. Does the car need to be running?

 

No.

 

Maybe the brights were on? Do they only come on with the low beams? Problem with the CPU?

 

Try a new relay? If you hear it click, that means the internal coil works. Perhaps the output power wire is bad?

eff it... just wire the switch direct to ground out the relay. Don't bother with stock wiring unless you have OCD like me. I FINALLY got the stock horn wiring working.

 

That would do it. For some reason factory fog lights are always designed to turn off when the brights are on..

 

I wired mine up separately to a switch, but I'm also S4.

 

i will see if maybe the brights were on when i was testing. i am trying to keep this circuit stock if possible.

if i did hard wire it, what is the easiest way without having to run wires from the switch out the firewall?

 

using another relay that takes its trigger from the same wire that triggers the relay for your parking lamps would be my suggestion

 

Seriously? That sucks. Its illegal to have more than one set of lights on here, so it would have to be fogs or headlights, but not both.

I guess I'll have to rewire them when I investigate whats wrong with mine.

 

I don't believe that's correct...certainly not here in Denver.

 

Finally got some time to double check. Turn out 42-4-212 agrees with you, I must have been remembering from one of the other state I've lived in. They may be used in conjunction with low beams, for a total of four lights on max (42-4-219) however it does require that they be between 12 and 30 inches off of the road surface when measured from the ground to the center of the light. The fogs on my stock height S5 are right at 12" off the ground, so lowering the vehicle will make the fog lights illegally too low.

 

Given the candlepower of the stock fog lamps, it's doubtful a cop would even notice they're on.

 

I'm sure that height rule is primarily meant to keep the auxillary lights below 30 inch's to avoid blinding other drivers. Lights below 12 inch's would only both snails, snakes, worms, and other Honda drivers.

 

Just tap into the running lights

 

^ that's what I did. I have a 91 ( didn't come wit fogs at all) and I took the fogs off my 90 and just straight tap'd them into my headlights. So when ever i turn on the headlights my fogs are on. Or just do it the cheapo way. Tape some flashlights where the fog lights go, when you want fog lights, get out of the car, flip the switch on each flash light and BAM! Fog lights! Lol jp.

 

Epic >> Uh.. But you could've just grabbed all the pieces off your 90' and had the factory setup for less work?

 

Yeah. I should of done that but I wasn't thinking lol. But any case they work and have zero issues with them. Been 3years.

 

^ Thus if you turn your brights on, your foglights turn off.

 

Hi. Do you guys know which one is the foglight relay? I have a 1989 GTU and I can't seem to figure out why it won't turn on.