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Author FUUUUU... Mazda battery/charge light, help please!
pow
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Registered: 11th Sep 06
Location: Hazlemere, Buckinghamshire
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14th Mar 11 at 18:30   View Garage View User's Profile U2U Member Reply With Quote
Halfway home from work tonight and the Mazda's dashboard presented me with this:



Obvious checks I've done include turning the car off and on again a couple of times, checking the belt is still there and present (PAS is still working), Alternator is turning and I think all the plugs are pushed in alright. If I rev the absolute tits off it it flickers off but comes straight back.

New alternator?
ryanlockie
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Registered: 25th May 10
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14th Mar 11 at 18:31   View User's Profile U2U Member Reply With Quote
Maybe charge the battery?
pow
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14th Mar 11 at 18:36   View Garage View User's Profile U2U Member Reply With Quote
The battery is pretty healthy, was new last year and never failed to start the car!
ryanlockie
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14th Mar 11 at 18:36   View User's Profile U2U Member Reply With Quote
I'd still check it
pow
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14th Mar 11 at 18:38   View Garage View User's Profile U2U Member Reply With Quote
I'll take it off tonight and charge it overnight then
AlexW
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14th Mar 11 at 18:50   View User's Profile U2U Member Reply With Quote
Check the voltage its putting out with a multi meter.
pow
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14th Mar 11 at 18:56   View Garage View User's Profile U2U Member Reply With Quote
Good shout
XE Col
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Registered: 23rd May 10
Location: Rochdale, AKA:Boissy07
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14th Mar 11 at 19:03   View Garage View User's Profile U2U Member Reply With Quote
check voltage across the battery while its running to make sure altenator running right
tom_simes
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Registered: 12th Jan 05
Location: Undy, Newport Drives: Skoda Octavia vRS estate
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14th Mar 11 at 23:44   View Garage View User's Profile U2U Member Reply With Quote
quote:
Originally posted by Boissy07
check voltage across the battery while its running to make sure altenator running right

Yep, I'd go with this being your problem.
pow
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Registered: 11th Sep 06
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15th Mar 11 at 19:07   View Garage View User's Profile U2U Member Reply With Quote
12.4V before starting, 11.9 after, alternator deffo isn't charging the battery.

Started to take it off tonight, my days what a CUNT it is to get at!
AlexW
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15th Mar 11 at 19:16   View User's Profile U2U Member Reply With Quote
Never easy lol, I don't want to burst your bubble but I would of done some more testing before replacing the alt
pow
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Registered: 11th Sep 06
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15th Mar 11 at 22:21   View Garage View User's Profile U2U Member Reply With Quote
The belt is there and tentioned, it's still turning the waterpump and keeping the engine cool, all the connections on the alternator are good, the earth strap from body to engine is still there, battery voltage tested before and after engine start and the light is on... I don't see what else I can do? It's the original alternator from 20 years ago...

Oh... and the battery is tested and fine. I know my way round a multimeter thanks

[Edited on 15-03-2011 by pow]

 
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