Linhai ATV 500-D T3 EFI Service Manual page 282

CHAPTER 8 ELECTRICAL
2. the taillight fails to come on
1. Bulb and bulb socket
CHECK SWITCHES
CONTINUITY
2. Voltage
Connect the pocket tester (DC20V) to
the bulb
socket connector.
Tester (+) lead→
Black terminal 
Tester (-) lead→
Green terminal 
Turn the main switch to on.
Turn the lights switch to on pilot
position.
Check the voltage (12V) on the bulb
socket connector
This circuit is not faulty
500ATV T3 EFI SERVICE MANUAL 16.0
NO CONTINUITY
Replace the bulb and /or bulb
socket
OUT OF SPECIFICATION
The wiring circuit from main
switch to
bulb connector of faulty.
Repair
CHAPTER 7 ELECTRICAL CTRICAL PAGE 7- 25