Hi Niall, rather late reply but your symptoms suggest an alternator rectifier 
problem. Alternators actually produce 3 phase AC. The rectifier has 6 diodes 
which form a full wave conversion to DC. If one or more of the diodes has blown 
then the alternator will only produce partial rectification. This will cause 
the indicator lamp to be partially illuminated.

It may be possible to fix by replacement of the  rectifier stack but there are 
various designs which may include the controller.

Repair does require heavyweight desoldering of the rectifier from the coils. A 
big soldering iron is required and some unsoldering/soldering skills.

Simpler to get the alternator checked and if faulty get an exchange unit.

Something to check first though is the wiring. There are two wires usually that 
connect to the alternator. The big wire is the charging lead that connects to 
the battery, sometimes via the starter solenoid battery connection. The small 
wire is the wire that gives feedback to the controller of the system voltage. 
Sometimes this is connected directly to the battery or may go back to the 
ignition switch. If this wire has an intermittent connection again the  
indicator lamp will glow.

Hope that helps.

Best regards

Ken



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________________________________
From: [email protected] <[email protected]> on behalf 
of Niall McCracken <[email protected]>
Sent: Monday, March 18, 2019 8:44:35 AM
To: Quantum Owners Group
Subject: Re: [Quantum Owners] Re: Charging 2+2 query

Thanks Jim, interesting points. I suppose it was a long time ago I may have 
misremembered something! But it was definitely something along those lines (not 
that that is much help to anyone either!)
Niall

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