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#332992 - 30th Jun 2009 9:07pm vauxhall airbag warning light
phalinmegob Offline

Wise One

Registered: 26th Dec 2008
Posts: 818
Loc: tranmere
hi all,my airbag warning light has suddenly started coming on but only when the car is doing over 2000rpm(approx), cavalier 1.7td with isuzu engine.going to angelsey in a few weeks and worried about my car now.a freind said i should change alternator but that has nothing to do with the airbag does it?
any idea,s....also anybody now of a good place to get my shims done...still have not had that fault sorted.

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#335319 - 11th Jul 2009 3:34am Re: vauxhall airbag warning light [Re: phalinmegob]
chris_gilly Offline

Forum Addict

Registered: 15th Feb 2009
Posts: 1950
Loc: tranmere
does it do it when static aswell as moving??
i cant really see the alternator causing the fault as the battery light would be light up. just check all the connectors, fuses, the sensors and ECU. its prob worth getting it on a diagnostic machine.. but if your not sure dont mess!
airbags are explosive and very harmful so if your going to mess then disconnect the batt and leave for a shortwhile atleast 10 mins
sorry i cant help more smile

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#335320 - 11th Jul 2009 4:09am Re: vauxhall airbag warning light [Re: chris_gilly]
Tony_1985 Offline

Forum Master

Registered: 19th Aug 2006
Posts: 2421
Loc: Ellesmere Port
could be down to any number of things

usually earth connections, dry joints, or loose wiring under the drivers seat

as above, don't go poking round without disconnecting the battery. i personally would advise leave it for at least 1hr before touching anything

if in doubt, take it to the nearest garage that is equipped with Tech2 diagnostic equipment. to get the codes read usually costs anywhere between 10 and 30, but a lot more at the main dealer

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#335338 - 11th Jul 2009 12:25pm Re: vauxhall airbag warning light [Re: Tony_1985]
diggingdeeper Offline

Wiki Master

Registered: 9th Jul 2008
Posts: 10791
Loc: Birkenhead
Don't discount the alternator, it could be a good call, it could be the first sign of the alternator brushes going, especially if mileage above 80,000 miles.

The 12v rail gets very noisy and some bits of kit don't like it. Get someone with a meter to checked the voltage with everything switched on (lights, rear-screen heater, fogs, full fan etc) and the revs about 1500, if the voltage is not stable then the bushes are on their way out. This is not the best test, perhaps someone else can suggest better?

Any other unusual symtoms, occasional stalling, radio not as good as usual are also indicators that the alternator is going.

The alternator warning light is useless for this because as long as the brushes are making some contact occasionally, the light goes out. I've had flat batteries due to alternator failure and the light still didn't come on.

A call at the car electrics place at top of green lane station road (actually old-chester road, queen st, chamberlain st junction) may put your mind at rest.

On the other hand it may be nothing to do with alternator - have you taken the relevant fuze in and out in case it has dirty contacts?
_________________________
In a time of universal deceit - telling the truth is a revolutionary act. George Orwell

When the debate is lost, slander becomes the tool of the loser. Socrates

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#335658 - 13th Jul 2009 8:49pm Re: vauxhall airbag warning light [Re: diggingdeeper]
DavidB Offline
Wiki Guide

Registered: 7th Dec 2003
Posts: 5634
Loc: Bebington, Wirral
Alternator can light up lights on the dashboard - I had the same thing on a 1.7 diesel Corsa where the handbrake light lit up. Can't really explain why it does it, it just does.
Isuzu engine alt also has an oil pump for the turbo, make sure you get the right one. wink
_________________________
"C20 LET bang"

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#336247 - 17th Jul 2009 9:18pm Re: vauxhall airbag warning light [Re: DavidB]
phalinmegob Offline

Wise One

Registered: 26th Dec 2008
Posts: 818
Loc: tranmere
i registered on a vauxhall forum and seems to be quite a common problem with this model,almost certainly an overcharging alternator.so i have been driving around with the rear window demister on to use some of the extra charge as advised by a few people there.airbag light goes off when i switch the demister on or put the heaters on full but thats too noisy.will sort alternator when i can get some money together.

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#336251 - 17th Jul 2009 9:35pm Re: vauxhall airbag warning light [Re: phalinmegob]
diggingdeeper Offline

Wiki Master

Registered: 9th Jul 2008
Posts: 10791
Loc: Birkenhead
Brushes aren't dear (don't go to main dealer), but if it has been like this for a while then there will be some damage to armature and you might need new slip rings fitted.


I wouldn't leave it, the 12 volt rail will be noisy and worst case might damage ECU, also the battery is probably not getting fully charged and may let you down.


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