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Old 20-01-2012   #1
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driving lights & fog lights

Hi, can someone point me to a thread about the operation of lights on a Stilo 1.6v Dynamic. I'm looking for an image of all the front lights, and which bulbs do what...

Yeah I know its a weird request... but every time i hit my front fog light button, then flick my stork to main beam, my dip beam goes out and I'm left with small clusters of light in the central part of the light... not good on the country roads (especially in thick fog on the moors road to Whitby )
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Old 21-01-2012   #2
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Re: driving lights & fog lights

They work that way. 3 alternatives:
Fog+dip.
Dip+main.
Fog+main.
On all alternatives 4 park bulbs are lit aswell.
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Old 21-01-2012   #3
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Re: driving lights & fog lights

That's how they're designed to work. You should only be using fog lamps if visibility is below 100meter, as required by law, and if visibility is that poor then you shouldn't be using your main beam as it'll be bouncing back off of the fog and dazzling you.

If the fog isn't thing enough to cause bounce back, then its probably not thick enough to be legally using your fogs

so there shouldn't be an issue

simples
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Old 21-01-2012   #4
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Re: driving lights & fog lights

Not when they don't work at all...... then there is an issue had a look at it today..

The tell tail on the dash comes on checked the fuse which was ok (top right 15a fuse in engine bay_ only fog light fuse showed in the handbook

((been 15amp i take it the rear fog lamp is fused somewhere else or was that the rear fuse if so where the heck is the front fog fuse?)) ... when the main beam is on and you operate the fogs the main beam goes out leaving only the parking /side lights lit other wise in all other light postion there is no output from the fogs


(only so much you can do in a pub car park )

and any idea which relay it is then to check the bulbs and for +ve at back of each lamp and ground)
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Last edited by Andy Monty; 21-01-2012 at 19:32.
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Old 21-01-2012   #5
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Re: driving lights & fog lights

Quote Originally Posted by Andy Monty View Post
Not when they don't work at all...... then there is an issue had a look at it today..

The tell tail on the dash comes on checked the fuse which was ok (top right 15a fuse in engine bay_ only fog light fuse showed in the handbook

((been 15amp i take it the rear fog lamp is fused somewhere else or was that the rear fuse if so where the heck is the front fog fuse?)) ... when the main beam is on and you operate the fogs the main beam goes out leaving only the parking /side lights lit other wise in all other light postion there is no output from the fogs


(only so much you can do in a pub car park )


and any idea which relay it is then to check the bulbs and for +ve at back of each lamp and ground)
I'd check the bulbs first, who's Stilo is this on
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Old 21-01-2012   #6
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Re: driving lights & fog lights

Quote Originally Posted by RedRuby View Post
every time i hit my front fog light button, then flick my stork to main beam, my dip beam goes out and I'm left with small clusters of light in the central part of the light
A light going dim when switching another one on in the same cluster suggests a poor earth connection. The right front light earth connection is inside the right wheel arch below the headlamp. Remove and clean the connector where the nut holds it to the body. The left earth connection may be inside the left wheel arch symmetrically opposite or may share the similar looking connector on the inner wing near the battery.

Another possibility is water in the grey engine fuse box. Is the large plastic battery cover fitted? Did the problem start shortly after heavy rain or driving through a puddle?
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Last edited by Davren; 21-01-2012 at 20:03.
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Old 21-01-2012   #7
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Re: driving lights & fog lights

Quote Originally Posted by Most Easterly Pandas View Post
I'd check the bulbs first, who's Stilo is this on

(the op's)

Quote Originally Posted by Davren View Post
A light going dim when switching another one on i the same cluster suggests a poor earth connection. The right front light earth connection is inside the right wheel arch below the headlamp. Remove and clean the connector where the nut holds it to the body. The left earth connection may be inside the left wheel arch symmetrically opposite or may share the similar looking connector on the inner wing near the battery.

Another possibility is water in the grey engine fuse box. Is the large plastic battery cover fitted? Did the problem start shortly after heavy rain or driving through a puddle?
.
Its not going dim Daveren the fogs are not illuminating at any point be it side lights headlamps or main beam and headlamps when the main beam is put on with the fogs it kills all the lights in the headlamp cluster bar the side lights and indicator where as when trying to turn them on with the headlamps or side lights the tell tail lights (as it does with the main beam) BUT no fogs but the headlamps stay lit.....

someone looks to have been in the fuse box before as the fuse was in on the piss slightly but that is sound and getting 12v constantly on both legs of the fuse

the battery cover is in place and the board on top anyway looked dry with no water staining or furry terminals

Am i right in assuming the headlamp clusters share the same earth for all functions?
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Old 21-01-2012   #8
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Re: driving lights & fog lights

Quote Originally Posted by Andy Monty View Post
Am i right in assuming the headlamp clusters share the same earth for all functions?
Yes.... the earth from each light cluster is a black wire from pin 14 on each cluster connector.

According to the wiring diagram:

Fog lights use fuse F30 (15Amp) and relay T14 (20Amp) in the engine fuse box.

The relay should get a permanent feed via F30 to terminal 30, and an ignition switched feed to terminal 85.

The relay is switched by an earth signal to terminal 86 from the Body Computer.

Relay terminal 87 supplies both fog lights.

20 Amp relays are the red ones, so try the easy stuff first.
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Old 21-01-2012   #9
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Re: driving lights & fog lights

thanks for that daveren

just cant work out why turning on the main beam and fogs kills the lights completely on both headlamps since they dont share the same earth and the rest of the lights work ok


seems to do the same as the first paragraph here

http://www.fiatforum.com/stilo/28537...ml#post2888182


so it could be a stilo quirk but both the main beam and fog tell tails stay lit in red rubys car
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Old 21-01-2012   #10
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Re: driving lights & fog lights

Quote Originally Posted by Andy Monty View Post
seems to do the same as the first paragraph here

http://www.fiatforum.com/stilo/28537...ml#post2888182
Quote Originally Posted by richydraper View Post
my front fogs work with sides and dipped beam but if I switch main beam the fogs go out. ive never needed to use the fogs as visibility has never been below 100m
I believe that's what they're supposed to do, but you say all the lights go out on RR's car.

Quote Originally Posted by Andy Monty View Post
so it could be a stilo quirk but both the main beam and fog tell tails stay lit in red rubys car
The dash lights are controlled via CAN signals from the Body Computer, so the dash lights could be on even though the actual light(s) they warn of are not working.

If everything works OK providing you don't switch the foglights on, the problem is likely to be in the fog light circuit. Check the inputs and outputs at the fog light relay as I posted in #8 above.
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Old 21-01-2012   #11
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Re: driving lights & fog lights

Andy with fogs on (selected on even if not operational) the dipped beams will go out when the main beams are selected. This IS normal

I suggest it might be time to get your copy of FES out and play with your leads can select all the individual CANBUS operations such as lights then and see if there are any faults stored on the computer.
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Old 21-01-2012   #12
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Re: driving lights & fog lights

Hi Andy ... thanks for looking into this for me ... and thanks guys for the advise....

I would still like to have a look at an image of the lay out of the bulbs, so that I can see what lights do what ... if that makes sense...

Andy, I'll give you a ring Tues night (college tomorrow)

Thanks all
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Old 21-01-2012   #13
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Re: driving lights & fog lights

...as you know I've only had Ruby since Sept, and then her electrics failed and didn't get her back till Dec - new ECU fitted.

So only getting to know her now and finding the quirks .. like the fogs and the non exsistant light flashes when locking the car...
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Old 22-01-2012   #14
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Re: driving lights & fog lights

Which ECU was replaced and was it new?
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Old 22-01-2012   #15
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Re: driving lights & fog lights

Yes .. did you see my thread about it lol... 4th attempt new ECU fitted, works fine 99% of time. No problems with start up check ... but over the last couple of weeks engine lights come on and kangeroo'd a couple of times... but I think that it's down to bad RIX fuel lol
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