Odd charging issue...

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   This could be a few factors.
As mentioned the voltage regulator is the main culprit in the majority of cases and they are only sub �10 from GSF etc for a Bosch part.

I had a similar problem last year and just decided to have my whole alternator recondition at a cost of �50.

Well worth the money

Rags

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Rags Members Profile Send Private Message Find Members Posts Visit Members Homepage Add to Buddy List Really Senior Member II Joined: 02-March-2004 Location: United Kingdom Status: Offline Points: 943	Topic: Odd charging issue... Posted: 15-December-2005 at 06:20
	This could be a few factors. As mentioned the voltage regulator is the main culprit in the majority of cases and they are only sub �10 from GSF etc for a Bosch part. I had a similar problem last year and just decided to have my whole alternator recondition at a cost of �50. Well worth the money Rags


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jpboost Members Profile Send Private Message Find Members Posts Add to Buddy List Really Senior Member I Joined: 24-June-2005 Location: London, GB Status: Offline Points: 292	Posted: 14-December-2005 at 06:55
	Dave, If you need a 'known ok' alt to swap it over with you can always try the one on mine? a bit of a hassle to take it off.... but the offer is there all the same. John

stevesingo Members Profile Send Private Message Find Members Posts Visit Members Homepage Add to Buddy List Really Senior Member II Joined: 03-January-2004 Location: United Kingdom Status: Offline Points: 795	Posted: 14-December-2005 at 06:06
	You can test this by checking the resistance between the exiter terminal (the small one) on the alternator and earth. Test this with the engine stopped, idling and when you rev. The resistance should remain constant if the brushes are making good contact with the tracks on the rotor. Steve

215DMX Members Profile Send Private Message Find Members Posts Add to Buddy List Really Senior Member II Joined: 14-May-2003 Location: Croydon Status: Offline Points: 1780	Posted: 14-December-2005 at 04:52
	Could they worn out in two years though? Edited by 215DMX

stevesingo Members Profile Send Private Message Find Members Posts Visit Members Homepage Add to Buddy List Really Senior Member II Joined: 03-January-2004 Location: United Kingdom Status: Offline Points: 795	Posted: 13-December-2005 at 18:17
	Brushes are a likly culprit. Making good contact an lower speeds but failing at higher speeds. Steve

215DMX Members Profile Send Private Message Find Members Posts Add to Buddy List Really Senior Member II Joined: 14-May-2003 Location: Croydon Status: Offline Points: 1780	Posted: 13-December-2005 at 18:01
	This evening my voltage started doing funny things... at idle it has dropped to 12.8volts (from 13.7) but when you rev the engine the voltage goes down to around 11v. Let it idle again goes back up to 12.8v Sound like the alternator ? Voltage reg. is about 2 years old. Battery is fairly new. Grounds are OK. But couldn't see much else as it was dark. ??????