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Joined: Dec 2008
Posts: 818
Wise One
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OP
Wise One
Joined: Dec 2008
Posts: 818 |
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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Joined: Feb 2009
Posts: 1,952
Forum Addict
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Forum Addict
Joined: Feb 2009
Posts: 1,952 |
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
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Joined: Aug 2006
Posts: 2,423
Forum Master
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Forum Master
Joined: Aug 2006
Posts: 2,423 |
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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Joined: Jul 2008
Posts: 14,351 Likes: 20
Wiki Master
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Wiki Master
Joined: Jul 2008
Posts: 14,351 Likes: 20 |
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?
We don't do charity in Germany, we pay taxes. Charity is a failure of governments' responsibilities - Henning Wehn https://ddue.uk
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Joined: Dec 2003
Posts: 5,683
Wiki Guide
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Wiki Guide
Joined: Dec 2003
Posts: 5,683 |
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.
"C20 LET bang"
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Joined: Dec 2008
Posts: 818
Wise One
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OP
Wise One
Joined: Dec 2008
Posts: 818 |
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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Joined: Jul 2008
Posts: 14,351 Likes: 20
Wiki Master
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Wiki Master
Joined: Jul 2008
Posts: 14,351 Likes: 20 |
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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