LJ%2520GTR%2520Wiring%2520diagram%20small.JPG 178.93K
10 downloadsLooking at the attached wiring drawing....top left-ish...you can see the dimmer (dipper) switch. The blue wire on the dimmer switch is seen as the 12v supply. The mustard coloured wire is the HIGH BEAM wire, that goes to both headlights and also goes to the HIGH BEAM indicator on your dash.
The tests you can do are -
1
When you turn the lights on, AND operate the dimmer/dipper switch - does the HIGH BEAM light on the dash light up? do the high beam head lights come on?
If so, you have established that the 12v supply to the light switch is good.
Also you have established that the dimmer/dipper switch is OK when in the high beam position.
2 If all the above works, and the headlights just don't work on LOW bEM, then suspect the dimmer/dipper switch. However if the tests in "1" don't work....we need to look further