Guide:- Connecting Fogs To Come On With Main Beam.
 

The principle is simple this will enable your fogs to come on with you Full/ Main beam for that little bit of extra light on the dark, bendy country roads:y: The fogs can still work without your main beam for when it really is foggy, and you shouldn't get in trouble if you don't go driving past people with your main beam on.

Things you will need to do this is:-

1.Wire of a suitable amperage, i used 17amp cable in 3 colours blue, red and black to make this simpler.

2. A relay to control your new circuit (Can get them from halfords £5/6)



3. Pair of wire cutters wouldn't go amiss either along side a soldering iron if you want to do a proper job:y:

So this is what you circuit is going to look like,
http://www.accessconnect.com/images2...%20install.jpg

I drew out a more simpler and easier to understand version though to help myself a little bit,



How to wire it up.
The first cable will connect to you battery and tho the relay at the prong marked 30, this will power you fogs. This can be connected to the battery terminal on the top of the battery or in the little fuse box above the battery like mine,



The next wire is a Ground/ Earth. This will go from prong 85 to and earth point on your car and will simply just form the earth for the current to flow through the relay from the main beam thus forming a connection of power to fogs.



Next job is to ad your new power cable to the fogs. this is done by finding the positive power cable leading to the fogs just before the connecting plug (behind front bumper passenger side) the colour is yellowy orange if i remember correctly. Simply strip the wire of its insulation and connect the new wire to this cable. This then connects to prong 87, now you have successfully created a 2nd power source to fogs allowing them to be turned on via main beam or normal fog switch.


Not the best picture but you can see where the blue cables joins to the existing positive feed to the fogs in the bottom right hand corner and is recovered with insulating tape.

The last cable needed to be connected to your relay is the main beam feed which will activate the relay causing the circuit to be closed and the fogs to be illuminated. this will connect to prong 86 and can be connected to one of two places:-
1. Under the steering wheel where the main beam cable comes off the stalk.
2. on the plug to the plug that connects to you headlight bulb.


I connected mine to the plug on the bulb for easiness.

Either of these allow a current to flow through the relay from 86 to the earth on prong 85, thus starting the electromagnetic to connect prongs 30 and 87 together illuminating the fogs.

The relay can then be placed in the fuse box under the bonnet for tidiness and all wires threaded through into there. it also sits nicely in one of the holes already there.


Now just side back end enjoy that extra light on the dark country roads:y::y:


Hope this guide helps some people, and if anyone gets stuck feel free to ask for help:y:

M.O.T time simply connect a switch up to any one of the cables leading up to the relay to stop the circuit being complete, causing normal operation to be resumed

And for people who think this isn't a good idea don't post in this thread. This thread was created for the people who think it is a good idea therefore your opinion is not needed and the subject is not up for debate.

Once again hope this helps
Cheers
Andy

nice thread :y:

will that pass an mot?

Not left how it is but a switch could be added to any one of the cables leading to the relay to stop this circuit eing complete therefor normal opperaion would be replaced.

good guide mate.

should add that in lol, i would do it but i couldnt afford a car with fogs lol

Added cheers mate:y:

no probs, i think its a good idea but like i say i dont have fogs

I owe you thanks x

edit: tad-dah

Nice one! good guide mate i will be doing this soon! Thankyou Thankyou Thankyou!

Its a good guide,but i dont see the point in it.

And you can be fined for driving about with your fogs lights on when its not foggy.

As said they only come on with your main beam and you don't drive past people with that on do you?!?

This thread is for people who think its a good idea and think its worth the unlikely risk of getting done for it and i also stated that this is just a guide and not a debate about the idea of it.

Cheers guys! If any one gets stuck don't hesitate to ask:y:

My lights are doing my head in on my saxo. Side lights work, and passenger dipped beam. Ive replaced the drivers side bulb, with 2 or 3 differnt bulbs. However i cant get the dipped beam to work, High beam works fine tho.

So im having to drive with fogs on until i come to a car, turn them off n only have side lights on.. :S

legend. at last some one has made a guide. i dont understand it 100% which is bad considering im doing and advanced electronics A-level which only 200 peeps in the country do, so i shud rele know how this works :S

edit: re read it and i understand it now. so basically; relay, 1 lead from relay to battery via fuse, 1 to ground, 1 to + on main beams, 1 to + on fogs? yeah?

nice guide mate

Thats the one bud just four wires basicly! haha i loved doing it as a did gcse electronics, felt like a plast from the past lol dead easy though hardest part is wireing to fogs as you have to get under the car to get to the wire them.
Let me know how you get on mate! i ot some 100w fog light bulbs also they they nice and bright:y:

haa good old electronics lol
yeah i have some of the ice/cold blue or w/e its called bulbs, the white ones with a slight blue tint. they're pretty good. for the 'MOT switch', does it go on the wire from the battery to relay yeah?

Nice clear guide there mate :y:

Could go on any cable i imagin mate because any one on them would cause the circuit to be uncomplete, maybe the feed from the main beam could be a good cable as it hasnt got a large current runing through it:y:

Cheers Bud!

Wicked thread mate, will deffinately be using this!