17-10-2022, 07:34 PM
Hi Peter
I would suggest that the cutout contact points have acquired a surface tarnish over 12 months. Although they are physically being pulled together, they aren't conducting electricity. The dynamo output is climbing higher than normal, and the difference between the dynamo voltage and the battery voltage is driving the warning lamp "backwards".
A gentle clean of the points with very fine glass paper, followed if possible by a clean with thin card soaked in switch cleaner or meths may well restore performance.
I would suggest that the cutout contact points have acquired a surface tarnish over 12 months. Although they are physically being pulled together, they aren't conducting electricity. The dynamo output is climbing higher than normal, and the difference between the dynamo voltage and the battery voltage is driving the warning lamp "backwards".
A gentle clean of the points with very fine glass paper, followed if possible by a clean with thin card soaked in switch cleaner or meths may well restore performance.