Sealed beam headlights - Need Help

So since I bought my 96 xtra cab, I've had issues with my sealed bead headlights. I've gone between having only high beams, no lights at all, or even half-power really dim headlights. I have tried switching between the sealed beams and conversion glass H4's. Same problems.
I've spent countless hours over the past year trying to figure it out, but just cannot. So i figured i might see if anyone here can help me.

My current wiring setup: only high beams function, low beams do not
Passenger side Switch position Driver side
Red/white- 12.39v Low Red/blue- 12.44v
Red/yellow- 0v Low Red/yellow- 0v
Red/green- 0.02v Low Red/green- 0.09v

Red/white- 12.39v High Red/blue- 12.44v
Red/yellow- 0.03v High Red/yellow- 0.09v
Red/green- 0.03v High Red/green- 0.09v

If someone could send me a picture of their 96-97 headlight wiring, that would be great.(power output to each wire in both switch positions would be even better)
BUT, i think my issue may be in the actual wiring of the truck. I feel like having only one wire in the harness that gets power is wrong - I should have two hot wires with the high beams switched on. And YES: I've done extensive searches already, and i have checked and replaced all fuses and relays, and bulbs are intact and fully functional.


Please give me your opinions on what you think may be the issue.

 

You might be able to find some help in this thread.

https://www.tacomaworld.com/threads/need-help-with-sealed-beam-headlights.400074/

 

Lol same thread.

 

PVT Pablo,
I posted this in the technical and 1st gen forum sections because it relates to both. 1st gen people may be able to help, and people who know their stuff with technical wiring may be able to help. No reason to be a dick and make a useless post - if you dont want to help me, that fine - but in that case just move on.

 

Have at any time you cleaned the plugs for the headlights ??

They do tend to corrode over time.

You have checked that the lights do work on both high and low

Fuses loose in the sockets ??

You only have one hot wire to each headlight.

The ones you are reading voltage

Since the Headlights are switched ground the high and low beams ground through the other wires on the bulb through the head light switch

I really wish you were closer I would love to help in person.

Are you having any other electrical problems

 

I have. just took apart the plugs and cleaned them this weekend. no difference.
And yes - lights are functional high and low
Fuses are good - no change when pressing/trying to move fuse/relay
No other electrical problems at all.

I think i may have to try and just take apart the lower dash/column cover and make sure everything is okay. I just have yet to find any reason as to why i only have power to one wire.. And yeah, i know it makes it alot easier when youre looking at it in person, haha

 

It is possible your contacts in the headlight switch are dirty or worn

Which would keep the circuit from grounding

 

Check headlight switch contacts. Check highbeam switch. Check headlight ground circuits.