Modded brake light not working, weird tail light set up

Hey yall, so I recently bought a taco and the previous owner did some cool work on it but the brake light is out and I have no idea how to fix it with this set up, I haven’t check under the truck but just wanted to see if anyone has had experience with this type of tail light set up

 

Custom means Custom repairs

what lamps are those? Older Cadillac?

what type of bulbs are used?

 

Start there.

You might browse the street trucks forum as well.

There is a very 90s vibe happening there. Hopefully you find the work well executed, not ghetto fabulous.

 

so, good news is, the plugs (not sure what they r called sorry) are easily accessible underneath the bed of the truck, kinda worried about exposed wiring but I don’t think it’s too much of a problem. Going to switch them out now and give an update