LR
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ElectricalMedium severity

Dynamo not charging (ignition light stays on)

Will get worse if left.

Symptoms

Red ignition warning light stays on, battery goes flat.

Likely cause

Worn dynamo brushes, faulty control box regulator, slipping fan belt or a broken wire.

Suggested fixes

Listed roughly in the order most owners try them.

  1. 1

    Check the fan belt and wiring

    Tighten the belt and check terminals at the dynamo and control box.

    Difficulty:
    Easy DIY
    Cost:
    £ (Under about £50 in parts)
  2. 2

    Replace dynamo brushes

    Brushes and bearings are easy to replace.

    Difficulty:
    Moderate DIY
    Cost:
    £ (Under about £50 in parts)
  3. 3

    Convert to an alternator

    An alternator conversion gives better charging at idle.

    Difficulty:
    Moderate DIY
    Cost:
    ££ (About £50 to £300)

This is general guidance gathered from owner experience and workshop practice, not a substitute for a workshop manual or a qualified mechanic. Costs are rough parts-only guides. Brakes, steering and suspension work affects safety, so if in doubt have it checked professionally.

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