The Vespa PX150 is equipped with 12V-9Ah battery. All electrical system checks requiring the detachment of cables (inspections involving ignition systems wiring and devices) must be carried out with the engine off, so to avoid any possible damage to the ECU, which would require its placement. It is therefore important to follow the wire color coding when reattaching the cables.
The following schematic illustrates the Vespa PX150 Battery Wiring and Starting System Circuit Diagram.
Key Switch Contacts
Projector Lamp (12V-55/60W)
High Beam Warning Light Bulb (12V-1,2W)
Light Switch With Flash
Light Remote Control Switch
Rear Side Light Bulb (12V-5W)
Instrumental Panel Lighting Bulb (12V-1,2W)
Headlamp Warning Light (12V-1,2W)
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