[AZKen]

Hello Tom,

The stop-dome and brake LP are the same circuit. Two wires from the same fuse. One wire supplies voltage to dome light, the other wire supplies voltage to stop light switch. This is shown on the diagram. Diagram not easy to read/follow. Some labels on fuse box are confusing. Electrical wiring and fusing had not yet reached maturity.

As lizzie says, B.U. is Back Up/reverse lamp in rear. To illuminate while backing. If equipped. Otherwise not wired.