I've some voltage problems in 22-years old W123 200d.
My lamps shine extra bright, now and then.
I searched for a reason and connected a voltage meter inside. When the lamps
shine extra bright, the voltage is about 19 Volts. It's only for about 30
seconds. Then Voltages decreases to normal level of about 14 Volts.
What's the cause of this problem ?
Damage to dynamo or voltage controller or ... ???
Who can help me ?