There's a plastic vaccum hose that runs into the firewall on the passenger side to a diaphram looking thing with several vac hoses located on the driver's side firewall. My hose was snapped in half so I fixed it. Don't know what I just fixed though? Also, there's a wiring harness on the firewall right next to where this vaccum hose penetrates. There's a red wire in the picture that's not hooked to anything. Any idea what it goes to? What's this vac hose go to? What's this diaphram looking thing? What's this red wire supposed to go to?