Above circuit diagram shows only signal circuit in wiring diagram.
B. Lighting Tests and Checks
The battery provides power for operation of the headlight, taillight, and meter lights. If none of the above operates, always check battery voltage before proceeding further. Low battery voltage indicates either a faulty battery, low battery water, or a defective charging system. See page 113 "CHARGING SYSTEM" for checks of battery and charging system. Also check fuse condition. Replace any "open" fuses. There are individual fuses for various circuits (see complete Circuit Diagram).
NOTE:
Check the headlight bulb first before performing the following check.
1. Headlight check NOTE:
When the engine is started, the headlight and meter lights come on automatically and the lights stay on until the main switch is turned to "OFF" even if the engine stalls.
|
HEADLIGHT DOES NOT COME ON WHEN ENGINE IS RUNNING |
Check for voltage on "W" wire to safety relay |
-----------> |
Check AC generator, diode, or wiring circuit |
▼ ▼ |
Check for battery voltage (12V) on "R/Y" wire to headlight relay |
-----------> No voltage |
Check fuse "Head or wiring circuit |
▼ Voltage OK ▼ |
Check for battery voltage (12V) on "L/B" wire from headlight relay |
-----------> No voltage |
Replace headlight relay |
|
HIGH BEAM AND/OR LOW BEAM DO NOT LIGHT |
Check for battery voltage at dimmer switch terminal |
-----------> |
Dimmer switch defective |
▼ Voltage OK ▼ |
Check for battery voltage at headlight high beam or low beam terminal |
-----------> |
Open or poor connection between headlight and dimmer switch terminal |
▼ Voltage OK ▼ |
Poor ground or poor connection of headlight wiring |
2. Taillight does not work:
a. Check bulbb
b. Check for 12V on blue wire.
c. Check for ground on black wire to tail/brake light and/or license light assembly.
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