Fuse #6 blowing every time a new fuse is inserted. Dash lights don`t turn on at night but gauges work.
Issue#2- left tail lamp does not work. All other lights and flasher are working.
What grounding wires do i need to look for to solve the problem?

 

The fuse is for instrument cluster lights,rear defogger switch,fog light switch,ac heater control basically any lighting inside the cab.Any light that switches on when you turn on your headlights,as for the other light check the bulb or the socket.

 

Tail light issue fixed: Wiring was incorrect and wrong bulbs put in by previous owner.
Dash lights still not working- but gauges are operational.
bad dash connection ?