Alternator low voltage

[m_c]

Depends on the alternator, but most modern ones aren't worth rebuilding, as you struggle to get parts.

If it's drawing current with the engine stopped, then the diode pack has most likely failed.

[M250cnc]

most modern ones aren't worth rebuilding, as you struggle to get parts.

If it's drawing current with the engine stopped, then the diode pack has most likely failed.

£180 plus vat says its worth looking at, could it be dirty connectors ?

Phil