VESPA GTS Super 125 i.e. Service Station Manual page 90

Electrical system
KEY
1. Battery
2. Fuse No. 1
3. Fuse No. 5
4. Ignition switch contacts
5. Fuse No. 4
6. Fuse No. 7
7. Electronic control unit
8. Daylight running light bulbs and license plate light
9. High/low beam two-light bulb
10. Light switch
11. Headlight relay
WARNING
ALL CONTINUITY TESTS MUST BE CARRIED OUT WITH THE CORRESPONDING CONNECTORS
DISCONNECTED.
TAIL LIGHTS AND LICENSE PLATE LIGHT LINE
1) Check that bulbs operate properly.
2) Check fuses No. 1 and 7.
3) Check key switch contacts.
4) Check if there is voltage between the Yellow-Black cable of fuse No. 7 and the ground. If not, check
cable harnesses.
5) Check that the cable harnesses of the bulbs and their ground connection are not interrupted.
HIGH-BEAM /LOW-BEAM LIGHTS LINE
1) Check that bulbs operate properly.
2) Check fuses No. 1, 4 and 5.
3) Check key switch contacts.
4) Check if there is voltage between the Grey cable of the headlight remote control and the ground
connection. If there is not, check the cable harnesses.
5) With the key switch set to «ON» and the engine running, check if there is voltage between the Yellow-
Red cable of the headlight remote control and the ground connection. If there is not, check the cable
harnesses.
6) Check that the White-Black cable connecting the headlight remote control switch and the control unit
(pin 19) is not interrupted.
7) Check the headlight remote control switch.
8) Check that the Grey-Red cable of the light switch and the headlight remote control switch is not
interrupted.
9) Check the light switch contacts.
10) Check that the cable harnesses of the bulbs and their ground connection are not interrupted.
ELE SYS - 90
Vespa GTS Super 125 i.e.