Now the dark evenings are upon us im finding that running a total loss lighting system unsatisfactory. So i have taken the dynamo off and would like to test it through with a ohm meter. however never having worked on a bike with a 3 bush dynamo im at a loss as to where to begin. I would like to test before sending for repair. Any pointers appreciated Colin.
Thanks Graham the dynamo is a fixed 3 bush lucas E3 M-1 type AX-0.And came fitted to my 31 squirrel which had no lights or wiring fitted. When running the bike i get no voltage output from the dynamo. Colin.
I do not know of your model, but guess that it has the 3rd brush earthed. It will only give an output if rotated in the designed direction.
Before stripping it, remove the 3rd brush and see if it produces voltage output. Without the 3rd brush it should give an output when rotated in either direction.
Do not have any lights connected, or you may blow them. The dynamo will be unregulated and it should produce about 18 volts without the third brush.