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can you convert your fog lights to come on when you switch to full beam, 02 sti, think i seen summit about this before, cant seem to find the thread though, any help wud be great guys....
It's easy enough to do, if you have a circuit tester.
But it's illegal, since the lights ARE foglights, and as such, should only be used in fog or low visbility.
To do it you need a relay, four terminal, preferably with fuse, or buy an inline blade fuse.
First remove foglights, disconnect from car wiring and tape up the car-side of the wiring against moisture ingress.
Now run wires from the foglight connector, either by cutting it off and soldering, or stripping some insulation and soldering, then taping the whole lot up. Take one from the foglight live to relay terminal 87, and the other to battery earth.
Then, use your circuit tester to find a wire behind one of your headlights, which is ONLY live when main beam is selected. Someone to sit in the car and select main beam then deselect it etc, helps here.
Once you have found which wire it is, Scotchlok a wire into it and run this to relay terminal 85, running another wire from relay terminal 86 to battery earth.
Finally, run a thicker wire, or the same as those feeding the lights, via a fuse, if necessary, from battery positive to relay terminal 30.
The wires from battery + and to lights, plus lights earths ought to be 28/010, where the others can be 14/010, or equivalents.
Fuse is 15A for 2 x 55W bulbs, 20A if you go up to 2 x 100W
Location: JGM made it quick, I ought to clean it !
Posts: 9,343
Easiest to replace with "real" driving lights, then as stated above, you just need a relay to switch them on with the main beam.
HID's come with a relay kit for little extra cost. Mine lights up the local footy pitch in winter..... (joke !)
My only addition is try to source a 5 pin relay, then if you get the wiring "wrong" you can use the 2nd output terminal to switch the lights. Hard to explain, easy to do !
can you convert your fog lights to come on when you switch to full beam, 02 sti, think i seen summit about this before, cant seem to find the thread though, any help wud be great guys....
As has been said it's illegal, and it's also an entirely counter-productive idea. The only time you actually *need* foglights is when it's so foggy your main or dip beams are "whiting out" the view through the windscreen.
The idea is that you turn your headlamps off completely and turn the fogs on instead (but when it's very foggy, not, chav-style, all the time). The fogs are deliberately aimed very close to the floor so they give you some illumination without turning the whole road into a grey soup.
If you wire yours up so they only come on when you have main beam illuminated, you are therefore entirely defeating the purpose for which they've been fitted. If you want an extra set of headlamps that illuminate alongside your main beams, as has been said, bin the fogs completely and fit a proper set of driving lamps. This is not only legal, even a cheap pair of spots will be several times more effective at illuminating the road in front of you than the Subaru fogs ever could be.
only thinking of trying it, there pretty handy for lighting up the side verges of the back roads, do rally time keeping here so thought it might be handy, cheers guys, think Ill gpo the driving light coversion as with dunx, is it a kit, cost, where
fog light to driving light
