02-05-2023, 09:54 AM
I think you are getting too many conflicting remedies.
Start by disconnecting the "D" and "F" leads.
Connecting your voltmeter from "D" terminal on dynamo to earth. Run the engine and you should get approximately 1 1/2 volts. If not the fault is in the dynamo, usually poor "D" brush connection lead , sticking brush or faulty armature.
If you get the 1 1/2 volt on the "D" lead, bridge the "D" and "F" terminals, keep the volt meter connected to "D" terminal. Run engine you should get 7 1/2 volts. If not the fault is in the 3rd brush circuit within the dynamo.
With the "D" and "F" leads disconnected, there should be no ignition warning light when the ignition is switched on. If the ignition light comes on with the "D" lead disconnected from the dynamo, there is a fault between the ignition switch and the "D" lead connection.
If there is no ignition light with ignition switch on and "D" lead disconnected, connect the "D" lead to earth and the ignition light should come on. This confirms ignition light circuit is good. Reconnect the "D" lead to the dynamo, switch on the ignition and the ignition light should be on. If not fault is in the "D" brush/armature circuit.
Start by disconnecting the "D" and "F" leads.
Connecting your voltmeter from "D" terminal on dynamo to earth. Run the engine and you should get approximately 1 1/2 volts. If not the fault is in the dynamo, usually poor "D" brush connection lead , sticking brush or faulty armature.
If you get the 1 1/2 volt on the "D" lead, bridge the "D" and "F" terminals, keep the volt meter connected to "D" terminal. Run engine you should get 7 1/2 volts. If not the fault is in the 3rd brush circuit within the dynamo.
With the "D" and "F" leads disconnected, there should be no ignition warning light when the ignition is switched on. If the ignition light comes on with the "D" lead disconnected from the dynamo, there is a fault between the ignition switch and the "D" lead connection.
If there is no ignition light with ignition switch on and "D" lead disconnected, connect the "D" lead to earth and the ignition light should come on. This confirms ignition light circuit is good. Reconnect the "D" lead to the dynamo, switch on the ignition and the ignition light should be on. If not fault is in the "D" brush/armature circuit.