Measure the resistance between lighting switch terminals. 
Measure the resistance between dimmer & passing switch terminals.
1. Connect terminal No. 4 to the battery positive terminal and the terminal No. 3 to the battery negative terminal, and check the resistance value between the headlight relay terminals.
|
Continuity |
Terminal No. |
Standard |
|
Yes |
1 and 2 |
Less than 1 Ω |
|
None |
1 MΩ or more |
2. Replace the headlight relay if it is found defective.
4. TAIL AND ILLUMINATION RELAY
1. Connect terminal No. 4 to the battery positive terminal and terminal No. 3 to the battery ground terminal, and check the resistance between tail and illumination relay terminals.
|
Continuity |
Terminal No. |
Standard |
|
Yes |
1 and 2 |
Less than 1 Ω |
|
None |
1 MΩ or more |
2. Replace the tail and illumination relay if it is found defective.