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PostPosted: Tue May 30, 2017 1:46 pm 
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Yes .

Well not exactly winking but on very dim , about 40% of the brightness with key on ,before firing up !!!

The alternator belts needed changing so I did them and put my spare alternator on .
Hadn't multimetered it before doing that (it wasn't flattening the battery but weather was warm ) but after changing , the light still stays on dim :|
Its doing 14.5 volts so no problems with charge I reckon.
Its a Mc Cormick CX 105 Extrashift (my loader tractor) Never seen it before ! (no the fault ,not the tractor)

I know a few years ago my Montego (what a classic!! :P ) would have its light stay on dimly but that was a bad and corroded connection on the multiplug!

So that 2 alternators the same ! (I think there was nothing wrong with the first ,mind)
The only thing ,apart from a bad connection on the 12 volt wire back to the keystart is some sort of damage to it somewhere??

What do the learned panel think ?? :)

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PostPosted: Tue May 30, 2017 3:43 pm 
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Bad earth? probably, possibly, hellif i know. :? :roll:

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PostPosted: Tue May 30, 2017 7:49 pm 
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It's Ffuked.

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PostPosted: Tue May 30, 2017 8:42 pm 
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Have you tried taking it off and putting it back on again?

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PostPosted: Tue May 30, 2017 10:11 pm 
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Location: Workshop- where else?
sometimes its an alternator fault, but in your case having it happen on two different ones perhaps you have a short or a bad earth and something is powering up through the lamp. look at the damaged wire you were on about and also check earth straps between chassis and cab.

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PostPosted: Thu Jun 01, 2017 12:51 am 
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Location: North Queensland Australia
crook earth or ground or what ever you call it


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PostPosted: Mon Jun 05, 2017 11:35 pm 
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Thanks Peeps.
We know there is a bit of high resistance on the positive terminal as the starter motor is a bit lazy (tried changing it too) but thats been like that for a yr or so,and we havent had that fault on the charge light for more than 2 months .

As LM says , it might be ff uked :D

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PostPosted: Mon Aug 21, 2017 11:39 am 
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Paul Griffiths wrote:
crook earth or ground or what ever you call it

Paul , we added another earth ground from the starter mount bolts back to the battery ,and it made no difference !!

My thoughts are a bit of corrosion (unseen) in the Pos lead at the battery .
We are going to add another positive lead in as well as the existing one , to see if it will cure the symptoms !
A bad connection might well be acting as a tight gate to the flow of electricity , but on a voltmeter will still show true voltage - hence why we get 14+ volts when charging .
I dont know :)

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PostPosted: Mon Aug 21, 2017 4:48 pm 
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Ordering a new heavier duty posi lead from Brucom 93 mm instead of 70 mm
Going to be about £40 - the Mc Cormick dealer wanted £85 for a new skinnier one .. :roll:

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PostPosted: Mon Aug 28, 2017 8:24 pm 
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Not ordered the new one yet .
Tonight , I went down the road at dusk with headlights on full and the hazard on . Charge light 50 % on
When in the field I noticed the hazard was revolving but the bulb was out .
Or was it? faint !! so I turned headlights out and it can on bright again??!!
Now surely the alternator would keep up with such a small demand on its own ,regardless of the state of the posi terminal integrity , or wouldn't it ??
Battery is good /newish ,in fact its had 3 in 4 yrs on it just to be sure . Charge voltage 14 .5 :roll: :?: :idea:

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PostPosted: Mon Aug 28, 2017 8:39 pm 
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I might add that the dealers mechanics -3 different ones , have looked at it over the last 3 times its been serviced by them !

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