No front signal lights

Most common is that the harness on the hood is missing the ground (broken wire). Try taking a wire from the ground to the base of the bulb to see what happens.

Did you check the harness from the hood back to the firewall?

 

Do u have voltage at the plug? From where the headlight assembly plugs into the harness? lot of times that harness gets rubbed thru . Had a couple trucks do that to me before...if not that, i would double check all grounds and just clean them best u can, before throwing money at a chassis node and it be something stupid like a bad ground.

 

I would take a good look at the wiring where it makes the bend where the hood is hinged.
I have had couple over the years that caused problems and did some erratic electrical stuff.

 

Best thing u can do is just trace backwards on that signal wire until you can find some voltage. Figure out where that plug goes to and try to find some voltage there... Maybe @Goodysnap @BoxCarKidd @pushbroom might have some better ideas

 

Don't assume, clean the grounds and then use dielectric silicone grease or Fluid Film before reattaching. The signal is going to have more draw than a marker light. Check the output at the chassis node before you jump and replace that. Very thin wire, sometimes called back-probes, can be used to check output at the plug without disconnecting anything. I would first check the correct pin with the plug disconnected.
If you have no voltage at the hood but at the node then the node is not the problem. If both do not have it then it is most likely a bad node.

 

See 2 attachments, may not be exact. Pins on node for right and left side t.s. are next to each other. On the wiring diagram note what is circled in red. This stud on the inside of the frame rail feeds both sides. I would clean that first. If no change then disconnect connector B at the node and test for voltage there. Even if there is no corrosion can't hurt to use a contact cleaner such as Deoxit and apply some dielectric silicone grease before plugging it back in.