Working on one of the projects. I got a wire for the cab lights and one for the light in the tach. I went to hook them up in the fuse block to come on with the rest of the lights, but all the words are gone on the block. I cannot find a diagram for the truck, its an 84. Would it be possible to wire them into the switch or will it blow fuses? I don't want a separate toggle switch for them, just to come on when the outside lights do.