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Re: L592 EVN formerly J2 CXM
Posted: Tue Nov 22, 2022 3:41 pm
by maxferreira
as of right now, it doesn't matter so much
hopped in the car this morning, immediately noticed the battery light was missing upon turning on the ignition
being an XM i ignored it, thought nothing of it
i set off all was fine so i thought
i then noticed the battery light glowing dimly, wipers were slow and headlights dim
decided then to abort the journey and take the C5, quickly checked and yep it wasn't charging
wiring looks fine, earths look horrible but they're clean and connected fine
alternator looks a bit tatty, so i'm going to start there by replacing that and see what happens
Re: L592 EVN formerly J2 CXM
Posted: Wed Nov 23, 2022 7:57 am
by Dieselman
Lack of sufficeint output is usually the regulator/brush pack, which should be a lot cheaper than a complete alternator.
Re: L592 EVN formerly J2 CXM
Posted: Wed Nov 23, 2022 9:27 am
by maxferreira
i've been offered a replacement alternator free of charge, so i'll just fit that
strange how the battery light isn't illuminating with the ignition.....wiring looks okay, will have another check though
Re: L592 EVN formerly J2 CXM
Posted: Thu Nov 24, 2022 7:32 am
by Dieselman
F.O.C. sounds pretty cheap...
The alternator field windings are excited by the power through the charge light, so if either there is no Ign feed to it, or the bulb has blown, the alternator won't work.
The regulator shunts the +12v to Gnd when not operating, hence the charge lamp is lit until the alternator is charging.
Check there is +12v on the small alternator connector, using a test lamp, before going further.
Re: L592 EVN formerly J2 CXM
Posted: Thu Nov 24, 2022 10:14 am
by maxferreira
tried it last night, all seemed fine and it also seemed to charge! great i thought so took it for a drive
just when i was a few miles away, battery light popped on
charged the battery up this morning, so it comes on with ignition now but doesn't charge at all
also there's a horrible noise coming from the alternator too, sounds like a bearing failing, so i'd say replacement is in order
Re: L592 EVN formerly J2 CXM
Posted: Sun Nov 27, 2022 6:36 pm
by maxferreira
you can change an XM alternator without removing the hydrualic pump on a 2.1
oil filter needs to be removed but it's only a slight c***t of a job
belts are all wrong as it had a xantia alternator on it
Re: L592 EVN formerly J2 CXM
Posted: Mon Nov 28, 2022 8:01 am
by Dieselman
Is it now working, or do you need to change the belt to the correct one?
What is the difference between a 2.1 Xm belt and a 2.1 Xantia belt?
Re: L592 EVN formerly J2 CXM
Posted: Mon Nov 28, 2022 10:40 am
by maxferreira
I’m awaiting the belt to be ready for collection tomorrow but I see no reason why it shouldn’t work
The seemingly xantia belt is slightly too long to fit the XM alternator on it now, it does spin but it’s flooppy and slips
Re: L592 EVN formerly J2 CXM
Posted: Tue Nov 29, 2022 3:51 pm
by maxferreira
right got it sorted today
new belt fitted, charging at 14.5v dipping down to 14 with everything on which is good
pump won't seem to attach to the bracket correctly so the top bolt is as tight as it will go and i can't move it, belt for the hydrualic pump is slightly looser than i'd like but it was fine on my 40 mile journey to charge the battery today
otherwise all seems well
Re: L592 EVN formerly J2 CXM
Posted: Wed Nov 30, 2022 8:03 am
by Dieselman
Take another look at the pump fixings, as a single point of fixing will lead to problems in time.