Welcome To The Scooterlounge Lambretta Homepage Added a wiring diagram for the Vespa VL3 to the Vespa wiring diagrams page CHECK IT. 10 - Cleaned up some coding and added a picture on the Online Owner's Manual project CHECK IT. 05 - Added a Lambretta LD and TV175 Brochure CHECK IT. Ray's Shed: Lambretta Info. page 3 LI Series 3 non battery 12V wiring diagram LED Lighting: One problem encountered with non-battery Lambretta's is that of the headlight dimming when the brake is applied. A way round this is to fit an LED bulb in place of the standard stop/tail rear bulb.