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        General >> Problems >> help battery light on
        
(Message started by: VSBlue on Nov 22^nd, 2007, 8:26pm)

Title: help battery light on
Post by VSBlue on Nov 22^nd, 2007, 8:26pm

my battery light came on & stays on & rev counter not working below 10mph then goes mad 4500rpm at 20 mph
put a meter on battery with engine off got 12.13v
engine running 11.23v
had new battery 8 months / new altenator 2 years ago but only done 9000 miles
any help

Title: Re: help battery light on
Post by harry.m1byt on Nov 22^nd, 2007, 8:50pm

Those readings suggest your alternator has failed (again), though it might also be worth checking the drive belt if you have not already done so.

I assume the thick cable between alternator and battery is OK and its terminals tight?

Title: Re: help battery light on
Post by jonnycab on Nov 23^rd, 2007, 2:34am

Was the alternator a recon ?....I've had recons go after a few hundred miles ???

Title: Re: help battery light on
Post by VSBlue on Nov 23^rd, 2007, 12:11pm

no it was a new one cost me about £100

Title: Re: help battery light on
Post by cuzza on Nov 23^rd, 2007, 9:28pm

:( sound like your alternator like other guys have said check leads connection ,drive belts, auto sparky you trust should be able to test it for you ......or if you have a meter should be making about 13-14 volts at your battery with the motor running ;)

Title: Re: help battery light on
Post by cuzza on Nov 23^rd, 2007, 9:33pm

:) obviously you have a meter missed the first post :P should be 13+ with motor running at battery sounds like your alternator is discharging 11.2v not good ??? check your earth connections :-/

Title: Re: help battery light on
Post by jonnycab on Nov 24^th, 2007, 3:50am

on 11/23/07 at 12:11:56, VSBlue wrote:

no it was a new one cost me about £100

About 8 years ago I paid £80 for a recon alternator for a Mondeo, so £100 is about the right price for a recon.
A brand new one from FMD would probably cost about double that I would imagine......doesn't really matter now though, because it's obviously out of warantee :(

After only 9000 miles the coils should still be fine & the brushes shouldn't have worn down, so it's most probably a fault with the voltage regulator.

This can be replaced without having to renew the whole alternator, but where you'd get a new regulator from ?....I don't know :-/..... :)

If you do find somewhere that sells voltage regulators, then let me know, 'cos I need one for my old alternator ;)

Title: Re: help battery light on
Post by Simmo on Nov 24^th, 2007, 9:45am

JC. Try THIS firm (http://www.woodauto.com/default.aspx) found via Google. ;) Mike. Also THIS article (http://www.aa1car.com/library/charging_checks.htm) may interest you,particularly the bit about the glowing light which features here occasionally. This (http://homepage.ntlworld.com/william.whittaker1/alt_strip_repair.htm) may be even more so. ;)

Title: Re: help battery light on
Post by VSBlue on Nov 24^th, 2007, 8:39pm

;D got a altenator from scrapy today £20 hope this one is ok
hard to find a 2.9 v6 scorpio altenator fitting sunday ;D

Title: Re: help battery light on
Post by jonnycab on Nov 25^th, 2007, 12:32am

Good luck & hope it's okay ;)

I got one from a scrappy & it lasted about two hours ???....took it back & he gave me another one which has been good as gold for the last year :)....it's the luck of the draw ;)

Title: Re: help battery light on
Post by VSBlue on Nov 25^th, 2007, 11:13pm

altenator fitted working well (pain to do)
fixed small water leak on top hose
fixed air bag on steering wheel it started to come off again (did it with out battery conected )
fitted kerb lights in doors
had a good day working on my scorpio }{