VESPA GTS Super 125 i.e. Service Station Manual page 100

Electrical system
INJECTOR CONNECTOR
1. Power from relay (Black - Green)
2. Electronic control unit (Red - Yellow)
LAMBDA PROBE CONNECTOR
1. Positive from control unit (Sky blue - Black)
2. Control unit negative (White - Green)
VOLTAGE REGULATOR CONNECTOR
1. Battery positive (Red-Black)
2. Ground lead (Black)
3. Battery positive (Red-Black)
4. Ground lead (Black)
INSTRUMENT PANEL CONNECTOR «A»
1. Fuel level indicator (White-Green)
2. High-beam warning light (Violet)
3. Left indicator warning light (White - Blue)
4. Right indicator warning light (Pink)
5. Key powered(White)
6. Oil pressure sensor (Pink-White)
ELE SYS - 100
Vespa GTS Super 125 i.e.