Part 1 of 4

EXTERIOR LIGHTING SYSTEM






FLOWCHART No. 1
Possible cause
^ Damaged combination switch (light switch)
^ Poor connection of connector, damaged wiring harness.

Procedure











1. Check continuity between terminal B of the combination switch connector and a ground.






FLOWCHART No. 2
Possible cause
^ Burnt HEAD fuse
^ Damaged headlight relay
^ Damaged light and dimmer switch
^ Open circuit in wiring harness
^ Poor connection of connector

Step 1






Check the HEAD 40A fuse in the main fuse block






Step 2











Measure voltage at terminals A (R) and C (R) of the headlight relay connector (4-pin).






Step 3
1. Disconnect the headlight relay connector and remove the headlight relay.






2. Apply battery voltage and check continuity between terminals of the relay.
3. If normal, install the headlight relay and connect the relay connector, then go to Step 4.
4. If not as specified, replace the headlight relay.

Step 4
1. Turn the light switch OFF.











2. Measure voltage between the W/R terminal of the combination switch and a ground.

Step 5
1. Disconnect the combination switch connector (light switch 14-pin connector).
2. Turn the light switch to HEAD position.











3. Check continuity between light switch terminals D and E.

Step 6
1. Disconnect the combination switch connector (light switch 6-pin connector).
2. Turn the dimmer switch to low.











3. Check continuity between dimmer switch terminals A and E.

Step 7
1. Reconnect the combination switch.
2. Turn the light switch to the HEAD position.











3. Measure voltage between the combination switch (dimmer switch 6-pin connector), W wire terminal and a ground.

FLOWCHART No. 3
Possible cause
^ Damaged light and dimmer switch
^ Open circuit in wiring harness
^ Poor connection of connector

Step 1
1. Disconnect the dimmer switch connector (6-pin).
2. Turn the light switch ON (second position, high beam condition).











3. Check continuity between terminals B and E of the dimmer switch (6-pin).

Step 2
1. Turn the light switch ON (second position, high beam condition).
2. Disconnect the headlight connector.






3. Measure voltage at terminal (R/W) of the headlight connector.
4. If the result is other than battery voltage, repair the wiring harness between the light and dimmer switch and headlights.






FLOWCHART No. 4
Possible cause
^ Burnt headlight bulb
^ Open circuit in wiring harness
^ Poor connection of connector

Step 1











Check the headlight bulb.

Step 2
1. Disconnect the headlight connector.






2. Check for continuity between terminal of the headlight and a ground.
3. If not as specified, repair the wiring harness between the headlight and a ground.






FLOWCHART No. 5
Possible cause
^ Damaged light and dimmer switch
^ Poor connection of connector

Step 1
1. Remove the light switch connector (6-pin).










2. Check continuity between terminals D and B of the light switch (6-pin).

Step 2











1. Measure voltage between terminal wire R and ground of the light switch (6-pin).