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fitting piaa driving lights on 03 sti???
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Old 14 Dec 2008, 08:19 PM   #1 (permalink)
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Angry fitting piaa driving lights on 03 sti???

hi all,has anyone fitted piaa driving lights on a o3 sti impreza?i am thinking bout doing it ,but dont have a clue about wiring lights up!? what i would like is for them to come on with full beam but also have a switch to have option of just using standard lights or both,can some one help please??
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Old 14 Dec 2008, 11:53 PM   #2 (permalink)
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Re: fitting piaa driving lights on 03 sti???

If theyre a spotlight rather than fog is illegal to be on a switch coz they`ll blind ppl coming the other way.


On an illuminating switch uve got 3 connections +supply in and +supply out(to relay or accesory to be switched on) and earth.


On a relay positive supply from battery/switching + from switch to switch relay on if ya like/ earth and +supply to accessory from relay(supply to lights in your case)


If ya want the lights to only work when the sidelights are on for instance run the supply to the switch off of the sidelight circuit(unless using existing switch)

Basically to use existing wiring from fogs for piaa`s(pretty sure theres a relay etc with em)wire a positive from battery to the appropriate terminal on relay, one of ya existing foglight wires (+one) to relay to switch relay on/off,earth the relay to something then other terminal on ya relay is supply to ya piaa`s,just split it into 2 wires at ya lights unless they come with a loom if ya like.

Terminals on relays are numbered

85 = Positive supply from switch(in your case use one of existing front fog live wires to this connection)


87 = Positive supply to ya new Piaa`s


30 =Positive supply from battery to relay.(should have inline fuse)


86 =Earth to car body.


Use existing earths on std lights to go to new piaa bulbs/lights.


For the record thats just basic stuff ive never fitted piaa`s, however fitted spotlights//neons etc before-the relay will be right though if numbered the same.(relays needed as bulbs in piaa`s are higher powered.)


Wire as above and will be as existing ones-just on switch.


Usually though piaa`s are wired off of main beam on headlights just to come on with flash/main beam-if thats what ya want whereas as before ya used +from existing foglights to switch relay use a wire from the wire that becomes live on the bk of ya headlight wiring when using flash/main beam an run to 85 on the relay.
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Old 15 Dec 2008, 06:49 PM   #3 (permalink)
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Re: fitting piaa driving lights on 03 sti???

hi there,
thanks for response,they are driving lights ,do you have a wiring diagram or something not that clue'd about electrics?
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Old 15 Dec 2008, 10:24 PM   #4 (permalink)
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Re: fitting piaa driving lights on 03 sti???

Ya Really dont need to be that clued up i havent got any diagrams unfortunately i always get by with just a 12v tester on most stuff ive wired up in the past.(small illuminating screwdriver with croc clip to earth and also a cheap multi tester just to show continuity when its needed to work out switches sometimes if not marked)


If ya ever need permanent live for instance for anything ya radio has one,and obviously a switchable live,if ya need something to illuminate inside when sidelights are on join into one of the foglamp switches wires-my boostgauge illumination is run off the foglamp illumination wire(constant illumination that is not the one to show foglamps are on) on its switch.

Dont need diagrams just need to know whats live when most of the time.

If ya cars already wired for front fogs as im "guessing" it is aint a very big job to use one of the + wires at foglamp end to switch piaa relay use existing earth at fogs for lights,seperate earth for relay as above,positive from battery with inline fuse,last relay connections supply to the new lights,causes a bit more aggro if you need to fit your own switch etc in the car an wire the lot.
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Old 17 Jan 2009, 10:37 PM   #5 (permalink)
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Re: fitting piaa driving lights on 03 sti???

decided to get a set of driving lights of a wr1,with wiring loom,will this be straight forward to wire up?
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