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Zafira Alternator

Posted By nicholassheppard 10/23/2006 9:56:21 AM
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nicholassheppard
 Posted 10/23/2006 9:56:21 AM
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Hi, I currently own a Vauxhall Zafira Elegance dTI, made 09/2000 on an X registration plate. The car has done just over one hundred thousand miles and I do all the serving myself.

I have recently had an electrical problem, which only occurs every three to four months, where I try to start the car and it attempts to turn over and the rev needle and speedo needle become erratic and move from there stationary position on zero anti-clockwise.

Luckily ther has been enough power in the battery to finally get it started, once turned off it is fine.

Anyway, researching on varius websites, the conclusion is the alternator not functioning correctly, I have fitted a new battery, but the indicator on the unit is not stating fully charge or ok.

Having looked at the alternator, Vauxhall have used external torx bolt heads, can anyone advise the size and socket I need to complete the job and other specialist tools I may need ?

Could it also be an earth fault?

Thanks for any advise you can give to me,

Nick

10/23/2006 10:01:00 AM by nicholassheppard
K And R
 Posted 10/23/2006 1:22:43 PM
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Nick.

Welcome to the ForumBigGrin.

A set of E Torx socket,s won,t be dear, and if you intend to repair this your self you will need a SETBigGrin

KEV.

"If you dont KNOW how it works, don,t try to test or fix it"

aidan
 Posted 10/23/2006 1:31:37 PM
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Hi

     It may be worth a few simple checks with a volt meter before condemning the alt. Have you got a volt meter? If so check the voltage at the battery with then engine running (about 2000 rpm) and also at the alt, you will need to connect to the big terminal and the alt casing. BE CARFULL of rotating pulleys etc.  Repeat the tests with headlamps, heated rear window & fan switched on,post the results

Aidan

Definition of Experience :- `Something you get, when looking for something else.’ Exclamation Mark I think I'm getting to much experience nowadays Crying

10/23/2006 1:34:17 PM by aidan
nicholassheppard
 Posted 10/24/2006 6:50:11 AM
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Is this the volt meter I need ?

http://www.toolshopdirect.co.uk/handtool/product/WST173

Cheers Nick.

nicholassheppard
 Posted 10/25/2006 11:47:10 AM
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I bought a volt meter and tested, the reading were

Battery with nothing on 12.5v

Started, engine at idle   13.5v

idle with everything on 12.7v

Revved the car at 2000rpm and the positive battery cable was that hot, turned everything off, it was frayed, so i bought a terminal clamp and relaced it

Now i get a steady reading of 14v when revved and turned everything on, no hot wires and when i switch the engine off the battery was reading 13v

Thanks for the help and advice,

Nick

HotAir
 Posted 10/25/2006 5:48:00 PM
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sounds like you may have fixed it by default!

Ray

nicholassheppard
 Posted 10/25/2006 5:53:25 PM
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Yeah, I saved myself a small fortune, I won't tell the wife though, she will only spend the money BigGrin
sherv
 Posted 10/25/2006 6:06:15 PM
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job well doneSmile

sherv

R.M.S DIAGNOSTICS, auto electrical and air conditioning specialists

nicholassheppard
 Posted 10/26/2006 12:07:38 PM
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Thanks for the replies, as I fitted a new battery and have a volt meter, I need to get a true reading if the battery has a good charge.

I drove the car today and I am now back at home, I took a reading, when every electrical item and engine where switched off, the reading was 13.1 volts, now,I believe this is not an accurate reading as it has current from the alternator, so, if I put a volt meter on the battery in the morning, will this be the accurate reading ?

HotAir
 Posted 10/26/2006 12:52:23 PM
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A volt meter can only indicate the voltage in the battery at the time of test.As a simple test, if you were to take some charge out of the battery, say by leaving the lights on for a while (not too long!), check the voltage, say 10.5v, start the car up run it 10mins. If back up to 13.5v alternator is charging.

Ray

PS. I think there was a good post on this forum a short while ago about battery charging


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