No headlight, turn, marker one side?
 

Quick thoughts. Have not had time to dig into the setup yet, but I have no headlight dim or low no marker light, no park light, no turn on the passenger side of my 72. I did look at the ground and fuzes real fast they do not seem to have any issues there, but any ideas? Everything else works as designed...

Also the headlight looks like it is in good shape and not noticeably blown. Wiggle the connector looking for an issue but nothing yet.

Will be digging an hour or so and will update with fix if I find it.

Thanks

Re: No headlight, turn, marker one side?
 

Unless fuses (no "z") have been added, the headlights (hi and lo beams) don't have fuses in the circuit. They're protected by a circuit breaker built into the headlight switch.. Go with the basics first.. Check for burned out bulbs, broken wires, bad grounds.. Then break out the test equipment and trace the electrical path to each item.. When you find where the electrons aren't present, you've found the problem..

I understand that electricity is mysterious to some people, but nothing is accomplished by taking quick looks.. Dig in and use good diagnostic procedures..

Re: No headlight, turn, marker one side?
 

a rusty dimmer switch was what I found wrong with my headlights. Still working on turn signals and dash lights. but thats something to check for your headlights

Re: No headlight, turn, marker one side?
 

is this a truck that you just acquired and the lights were not working when you got it or is this a truck you have had for a while and the lights just stopped working.

Re: No headlight, turn, marker one side?
 

These MIGHT all share a ground. I would likely start with a test light from the battery ground to the socket or connector. Ensure you are getting power over there. I would think it would be odd to loose power to that location only otherwise. Right headlights out, with the left headlight still working. Front park and turn not working while the rears still work. Seems location and ground would be the common element between the non working bulbs.

Re: No headlight, turn, marker one side?
 

X2 - Ground issue