passenger side has:
phoenix gold m44 amp (old old old... but works like a champ). this amp used to run my dual enclosed JL box (2 x 10") but the box got in the way of stuff I had in the back so that went out the door (now just sits in my room on the floor and prob will until i either sell it or use it on another vehicle. now my amp runs all the speakers in the truck (stock speakers sux btw.... gotta find a way to change em out when i have the funds)

driver side has:
secondary electrical circuit. controls and drives all my accessories I have currently running (amp,cb,aux lights... etc etc) - i set this up this way so if i have a problem, it's only related to one spot and easier to work around rather than running around the engine bay tracing each line.