According to the manual the only fuse for the heater blower is the one in the aux fuse in the engine bay, 30 amp green, It may be the switch has gone??, if the blower switch was going would it make the screaching sound and not the blower??, I need to find out what the problem is before I can sort this out, was all sorted to remove the blower just purchased new resister as well, old cars ehh