Author Topic: Fog lights (Read 4495 times)

Meister · « **on:** September 12, 2007, 07:30:21 AM »

My 91 318iS didn't come with fog lights, i just have the covers where they go but no fog light switch inside. So my question is, how to i know if I am already prewired for fogs and how hard would it be to install? or if I am not prewired how would i go about getting some on?

ak96ss · « **Reply #1 on:** September 12, 2007, 09:47:11 AM »

They pretty much all came prewired - I hesitate to say they all definitely did, because as soon as I do someone will produce one that didn't.

However, I've never seen one that wasn't. Look behind the blanks where the foglights are. It may be tucked way up there, or taped to the harness, but you should have a connector hanging up there with two wires going into it. If you have one on each side, and you should, you are prewired and only need to install the switch and the fuses and you are good to go.

DZick · « **Reply #2 on:** September 12, 2007, 03:24:52 PM »

My connections were down below the headlights behind the covers.

Meister · « **Reply #3 on:** September 15, 2007, 02:22:34 PM »

Ok thanks i'll check it out

gearheadE30 · « **Reply #4 on:** September 16, 2007, 08:37:11 PM »

The other end of the wires is often above the orange airbag control module behind the instrument cluster. Sometimes they fall down behind the box (like mine) and they are a pain to get out. You really need to take out the cluster to do this.

johna · « **Reply #5 on:** September 17, 2007, 12:21:51 AM »

It should be pre-wired but you will also need the fog light switch, fuse and relays.

shutter · « **Reply #6 on:** September 17, 2007, 11:40:56 AM »

I was lucky, mine had the relay, the fuse, the switch, and the wires righ next to the covers... and I have a 318I. Sorry, just rubbing it in :p

Meister · « **Reply #7 on:** September 18, 2007, 04:31:22 PM »

I still haven't had much time to look into this yet but, if I were to be able to hook all this up, could I do it with out having to hook up the switch inside?

ak96ss · « **Reply #8 on:** September 18, 2007, 04:52:58 PM »

How would you turn them on and off?

Meister · « **Reply #9 on:** September 26, 2007, 09:34:47 AM »

What I mean is that if I hook them up without using a switch, would they turn on with my headlights?

ak96ss · « **Reply #10 on:** September 26, 2007, 08:10:20 PM »

Not unless you rewire them. You would have to have a separate relay to turn on the fogs, as I don't know that the existing wiring for the headlights is heavy enough to run both the headlights and the foglights.

I wouldn't run them both on it, anyway.

Pretty easy though, just use a relay triggered off the low beam light to turn on the fogs.