I'm hoping I can get some assistance. I have a 76 Vespa 90. Runs great. however I can't seem to get the headlight right. I have the wring diagram. (there is a lot of different diagrams) basically there is a dark green wire running from the switch on the headset to the headlight switch. That dark green wire gets its power from a light green wire. That light green wire I cannot find on my diagram. Also the headlight only seems to work with certain bulbs (all are 6volt of course) the high beam indicator light work. When I go to test the volts my meter says 0.00 but the indicator light is lit. I need help.
i have read other post regarding similar issue but none seem to mention this light green wire.