When low current 12v power is put into the relay it triggers a larger switch which can handle the current straight off the battery to power the horn. Post 1973 vespa 90 125.

Modern Vespa Would You Convert A Classic Vespa To Electric
Vespa vbb 12v conversion wiring diagram. Scooter mercato duration. See the wiring diagram for more information. Bgm pro ignition 12v conversion for vespa early model tst wrenching guide ft. Modified hornlight switch. The electronic ignition kit itself already includes a loom to add on to your original wiring this kit includes. 150 super vespa 90 primavera between 1975 1976 1975 1976 models model.
Vespa lambretta 1950s. Vespa p200e prior to frame number 34627 model. The diagram at the bottom of the page changes from a standard vbb wiring to a p200e battery system with no indicators. Electrical diagram vbb1t click for larger image. I will try my best to track down that specific diagram for you. Vespa p200e vsx1t model.
This wiring kit goes with our 12v vbbvbcvlb cdi electronic ignition kit using px style flywheel and ducati type cdicoil unit but only if you want to rewire the whole scooter. Here are some pdf wiring diagrams. Vespa lambretta 1960s. Vespa lambretta 1940s. Vespa rally 200 model. Before 1973 vespa super sprint and veloce 1973 vespa wiring diagram.
That scooter thing 8397 views.