05-06-2020, 11:46 PM
With dynamo fitted, disconnect "F" and "D" leads from dynamo. connect volt meter to dynamo "D" terminal to earth, run engine. Volt meter should read 1-3 volts. No volts= Duff dynamo.
Assuming the dynamo produces 1-3 volts, bridge "F" and "D" dynamo terminals, connect volt meter "D" to earth, again dynamo cables disconnected. run engine, {NOT FOR LONG} voltage should rise with engine speed up to 50 volts!!
If this works, dynamo is OK, fault is in wiring or cut out.
Assuming the dynamo produces 1-3 volts, bridge "F" and "D" dynamo terminals, connect volt meter "D" to earth, again dynamo cables disconnected. run engine, {NOT FOR LONG} voltage should rise with engine speed up to 50 volts!!
If this works, dynamo is OK, fault is in wiring or cut out.