General Peculiar Rear Indicator Bulb Error

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General Peculiar Rear Indicator Bulb Error

AceStilo

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Usually go on and on in my posts but I'll try and keep thisshort and concise.



Little while ago my dash board started intermittentlythrowing up an error saying "Bulb Failure... Rear Indicator >... StopLamp", basically telling the driver side rear indicator bulb was failing.To re-inforce this, every time i indicated right it clicked a lot faster thanusual, about 3 times the rate.



So as any normal person would do, I went out, bought areplacement bulb, fit it in and tried again, assuming problem would have goneaway.



No change, exact same error.



So after doing a bit of research on here, i found thatsometimes the circuit boards and other metal in the rear lights cluster startsto rust and messes with the electrics. So I took it all apart, found no rust,but still cleaned everything properly with some contact cleaner and re-fittedit all.



No change, exact same error.



So I was considering taking it to a garage as this has beengoing on for months now, that stupid beeping sound occurs literally about 5times every minute as I'm driving, makes me want to drive the thing over acliff.



Anyway, I leave it alone for a couple of weeks and justlearn to live with the sound to some extent, when one day I'm driving alonghear that blasted sound, look down at the dash and see the same error message,except now it reads "... < Rear Indicator >..." implying bothof the rear indicators were now playing up. I checked the left indicator, andthat too now had the faster click rate, but the right indicator was back to thenormal clicking rate.



Basically, as things stand now the error comes up, onaverage every 20 seconds and intermittently switches between left, right orboth rear indicators. It happens when the car is both stationary or moving, soon as electrics come on it beeps. The annoying thing, is that the system won't just beep once to alert me that there's a problem and leave the error light on my dash dash, it repeatedly goes off as though it's registering the error, then forgetting it, then registering it again, as though there's some loose contact that's trigering it at intervals.



I've uploaded a video to show you exactly what's going on.Couldn't quite get the right indicator to click faster in the vid but it doeshappen all the time. Apologies for the low fuel warning, thats not related tothis at all.



[/URL]



Car: Fiat Stilo 1.6 16v AC 5 Door Petrol 75,000 miles

Battery:Exide BatteryExcell Battery 100 (71Ah) 3
 
The faster click rate is simulated by the body computer electronics when it 'thinks' a bulb has failed (I have seen this happen when all bulbs were working fine). In older cars it was a direct side effect of current through the flasher being reduced.

Check all other taillight bulbs for correct wattage and 'unblownness' (don't like that word - how about 'intactity'? :p)

I have seen a Stilo generate the wrong bulb fail warnings when a different bulb is blown. On that occasion it said 'number plate fail' when two of the four sidelight (tail lights) had blown.

-Alex
 
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Bad shared earth maybe.
How would I sort this?



The faster click rate is simulated by the body computer electronics when it 'thinks' a bulb has failed (I have seen this happen when all bulbs were working fine). In older cars it was a direct side effect of current through the flasher being reduced.

Check all other taillight bulbs for correct wattage and 'unblownness' (don't like that word - how about 'intactity'? :p)

I have seen a Stilo generate the wrong bulb fail warnings when a different bulb is blown. On that occasion it said 'number plate fail' when two of the four sidelight (tail lights) had blown.

-Alex

Okay, well shortly after this problem started occuring my passenger side head light and tail light when out, thought my batter or a fuse was causing this problem. Will change these bulbs and up date you when this is done.

Also, how do I check the wattage of my bulbs?
 
The wattage requirement is moulded into the plastic of the bulb holder - 5W, 10W, etc. Each bulb has its wattage stamped into the metal cap or printed onto the glass. Any that can't be identified or any really-cheap-looking bulbs (wonky/badly made) should be replaced, as they might not conform to specs. I try to stick to brand names (Osram, Philips, etc.) for cars like the Stilo where bulb resistances are being measured by the body computer.

The way it measures resistances seems prone to error when there are multiple bulbs failed. Hopefully it'll all come right once you sort out those other bulbs :)

-Alex
 
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