deano87
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Registered: 21st Oct 06
Location: Bedfordshire Drives: Ford Fiesta
User status: Offline
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Am I correct in saying the alternator light is the one which looks like a battery?
Anyway, when I turn the ignition off on my 1.0 12v W-reg, every light goes out instantly except for the alternator light which gives bit of a flash and then fades, is this right? Also I hear a whirring from the engine as I switch off the ignition, which I presume if the alternator.
Doesn't really bother me, just want to know if it's right and safe...
Many thanks in advanced 
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deano87
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Registered: 21st Oct 06
Location: Bedfordshire Drives: Ford Fiesta
User status: Offline
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ttt
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12vMatt
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Registered: 28th Oct 06
Location: Sunderland
User status: Offline
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i get a whirring form mine when i switch it off, i think the alternator light is that one but dont know about whether it doesnt turn off straight away, ill check later today.
dont think its anything to worry about, i hope anyway.
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deano87
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Registered: 21st Oct 06
Location: Bedfordshire Drives: Ford Fiesta
User status: Offline
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May just be 12v's then.
Anyone else?
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scottyevo
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Registered: 26th Apr 05
Location: wigan
User status: Offline
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your alternator back feeding, need a new one mate
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deano87
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Registered: 21st Oct 06
Location: Bedfordshire Drives: Ford Fiesta
User status: Offline
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Is this dangerous then? What will happen if I don't get a new one?
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scottyevo
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Registered: 26th Apr 05
Location: wigan
User status: Offline
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not really dangerous, but if blows ya dash light out. that will need replacin to before ya alternater will charge correctly
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deano87
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Registered: 21st Oct 06
Location: Bedfordshire Drives: Ford Fiesta
User status: Offline
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Ok - when I have my lights on and switch the heated rear screen on my lights fade ever so slightly when idling, is this because of the alternator (the change in light is extremely minimal and can only see it when facing something close the the garage door etc)? The battery is about 62,500 miles old.
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scottyevo
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Registered: 26th Apr 05
Location: wigan
User status: Offline
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if the light stayin on when ignition off a new one is needed.diode pack inside has failed. sounds like u need to run an earth lead off the alternater bracket to a good earthin point too
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deano87
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Registered: 21st Oct 06
Location: Bedfordshire Drives: Ford Fiesta
User status: Offline
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It doesn't stay on continuously, just like 2secs after the ignition is turned off. Is this still the problem?
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scottyevo
Member
Registered: 26th Apr 05
Location: wigan
User status: Offline
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on its way out then. u got a multimeter?
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deano87
Member
Registered: 21st Oct 06
Location: Bedfordshire Drives: Ford Fiesta
User status: Offline
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Naaa. My mechanic is normally pretty good with things like that though. I also need the engine coolant checking so may pop in and see him.
If I used a mutlimeter, is it the case of being 12v when not running and 14v when running? (I read another thread  )
[Edited on 20-11-2006 by deano87]
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scottyevo
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Registered: 26th Apr 05
Location: wigan
User status: Offline
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yeah mate more or less
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deano87
Member
Registered: 21st Oct 06
Location: Bedfordshire Drives: Ford Fiesta
User status: Offline
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Cool cheers - thanks for your help. At least I know the car isn't going to blow up on me in the near future.
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