Wiring Hell!

The PO tore out a bunch of wires,cut them ,jumped them and generall has confused the hell out of me! I've got headlights and front turn signals,my heater and lighter work,ignition works, but no brake lights or reverse and the rear turn signals are not consistent. I did find from my diagram that the reverse and turns are wired into the wiper switch and that the wiper mount was put in upside down which appears to have burnt the wiper motor. My Q is:is the little silver box on the wiper switch a fusible link? I can't find any reference to it in my manual and I can't seem to get any further! Thanks for any info,b.