With a good flash light check the engine compartment first, what you are looking for is the gnawing of all the wires in the compartment,, any shiny wires, need to be fixed immediately.
Under the dash you will see the poop and there will be small pieces of the wire insulation on the floor, to look for the wires, you will again need a flash light and a small mirror, shine the light on the mirror and point the mirror in the direction of the area that you want to see, the light will fall on the same area, again any shiny wires need attention.
Good luck
navegator