2. The taillight fails to come on. 1. Taillight bulb and socket Check the taillight bulb and socket for con- tinuity. Refer to “CHECKING THE BULBS AND BULB SOCKETS”. Are the taillight bulb and socket OK? YES NO Replace the taillight bulb, socket or both. 9 - 33 LIGHTING SYSTEM ELEC – + ELEC – + 3. Voltage 2. Voltage • Connect the pocket tester (DC 20 V) to the • Connect the pocket tester (DC 20 V) to the headlight couplers as shown. tail/brake light connectors as shown.
È When the light switch is set to “LO” Tail/brake light connectors (wire harness É When the light switch is set to “HI” side) Headlight coupler (wire harness side) Positive tester probe → blue 1 Headlight Negative tester probe → black 2 Positive tester probe → yellow 1 or green 2 Negative tester probe → black 3 È 1 2 DC20V Y G G Y B B É 3 • Set the main switch to “ON”. • Set the light switch to “LO” or “HI”. • Measure the voltage (DC 12 V) of blue 1 • Set the main switch to “ON”. on the tail/brake light connectors (wire har- • Set the light switch to “LO” or “HI”. ness side). • Measure the voltage (DC 12 V) of yellow • Is the voltage within specification?
1 or green 2 on the headlight coupler YES NO (wire harness side). • Is the voltage within specification? This circuit is OK. The wiring circuit YES NO from the main switch to the tail/brake light This circuit is OK. The wiring circuit connectors are faulty from the main switch and must be to the headlight cou- repaired. pler is faulty and must be repaired.