i am trying to trace back the power that feeds the fuse block for the power windows and the heater fan on my 1989 firebird. i believe i traced it back to a switch or block on top of the steering column. i cant seem to find a schematic for the wiring before the fuse box, just every thing after it. the person hacked the wiring up before me when they swapped a 350 for the 2.8l that was in it. so it is a hack job. is there a wiring diagram somewhere for the fuse box wiring? what does the switch or block do above the column. i though it was a relay block of some sort.