Derbi GP1 50 cc Workshop Manual page 122

- Repeat the same operation with the terminals inserted
between pins 5 (+) and 6 (-) and check for the presence of
battery voltage with the ignition switch onto ON. If unsucce-
ssful, check the ground cable on the regulator.
- If the checks given above are unsuccessful, jump pins 5 and
7 on the connector, turn the key-switch onto ON and turn the
turn signal switch alternately from left to right to visualize the
continuous operation of the lights (as powered directly by the
battery). If the lights do not go on, check the switch and its
cable, if these are not damaged or faulty; replace the regu-
lator as definitely faulty.
Specific tooling
020331Y Digital multimeter
FAULT 6
Dashboard check light does not go on. Detach the connector
to the voltage regulator.
- Apply a tension of 12V to the pin marked with the num-
ber 5, check, using the digital tester; there is an equivalent
output (12V) from pin 3 for at least 5 seconds.
- If pins no. 4 and/or no. 3 give no output voltage, replace
the regulator.
- If pin no. 3 gives output voltage, check the system and the
low-oil or low-fuel warning lights.
Specific tooling
020331Y Digital multimeter
121