Ignition light staying on

[Dave Mann]

With a non working dynamo I disconnect the wires to the dynamo and put a link wire between F and D and a analogue voltmeter between F or D and the dynamo case and run the engine. If I get a voltage above 6 volts, depending on how fast it is run, then I look elsewhere for the cause of the problem. If there is no volts I turn the engine to No 1 cylinder firing then remove the dynamo to the bench for a closer examination, trying to fix a dynamo on the car is very difficult.