1993 Ford Towtruck Lights

Right now, im working on a towtruck trying to fix the lights. The signal and hazard lights dont work, the brake lights dont work. But, all of the lights turn on when the parking lights are on, only that the brake lights dont get brighter when the brakes are applied and the signal lights dont blink. no fuses are burnt. could someone please assist me with this.

What i was thinking was of wiring all of the lights directly to the switch of each one with a fuse in-line and with some relays, but its a lot of work. maybe perhaps there is a way to fix it easier.