help please- headlights dont work

Try the fusible link that normally comes straight off the battery. Its the wire that has a funny looking thing about 2 inches long.

Brian
Don't know much about you exact truck. But if you have a multi meter or a test lamp (12/v bulb with wires coming off for easy connection) I would test the 12V Pos at the lights, but my highest suspect is the earth, If you have power at the rest of the lights may be its the other side ?? If Pos + is at the lights you can test with a length of wire from the earth side of the light back to the batt Neg -
Jugs

brian
It really sounds like a fuse. Have you replaced it with any of the non essential fuses to check it out
Regards Bob

There is no fuse in this system so wont be that. Fusibl elink as suggested earlier of the circuit breaker.

Funny but I had lights problems this morning too with my 75s troopy except it was the hazards, they started soon as i turned the key on and i could'nt stop them , then I pressed the alarm button on the key ring and they stopped but soon as the key was turned away they went again ,for some reason I thought there must be something about the alarm so popped the bonnet and took the fuse out of the alarm and no more problems , maybe there is a short in the alarm.

Brian
Sorry i didn't really answer your question before but had to have time to ponder on it , when I go from H to L beams and vice-versa there is the sound of a relay switch working, could it bw a faulty relay

Hi Brian,
Another possible cause if all the other suggestions fail is a faulty combination switch, the module around the stearing column. I was crossing the nullabor a couple of years ago in my troopy and the headlights just went dead, I had to hold the high beam lever back till I could find a place to camp for the night. A few days later I pulled the stearing wheel and removed the combination switch to find a broken contact which i managed to fix ok with some solder. Best of luck, Peter.

Just had the same thing happen with my indicators.
Worked sometimes, but more often than not.
The fuse had a crack or fine break in the wire that I couldn't see too easily.
New fuse, all OK now.
Other choice besides fuse/fusible link is switch or relay.

You may have to work back from the battery with a tester.

Thanks everyone for your replies.
Today i checked all the fuses, all ok.
Took my ute to the auto electrician and two headlight bulbs later, all working.
Both low beam headlights blew at the same time, and once the sparky fix that, the spotties started working straight away.
OK if you have a spare $85. But it is all good now!