I have the wiring diagram (schematic) what I can't find is the wire at the fuse block. I'll try to trace it under the carpet from the cigar lighter. I also can't figure out how to replace the dome light bulb if that becomes necessary. I was hoping that someone has one apart and can give me a clue as to how to do that without damage to the head liner.

Well, mine was restored maybe 20 years ago and is in really good shape. Wires look like they were replaced at that time with original type wire. The thing is... I have found that restorers are really good at everything except understanding the electrical stuff. I think I will have to lift the carpet to see where the wires end up when headed for the dash. (nothing under car) They may be dead ended somewhere, can't find them coming up under dash. Some firewall wiring is still a mystery but no extra wires hanging down. I had tried turning on the lights to see if that mattered, still nothing. While I figure dome light bulb is ok, still can't be sure there is one as I don't know how to get to it without breaking something. The attachment must be something like on the cigar holder but can't find a way to release it. I can use an ohm meter at the cigar holder with dome light switch on to see if there is continuity but figure why not get power to it first to see what happens. Dome light power is after cigar lighter and there is no power there and I don't think they were only allowed to smoke after dark.

29 Packard 4 door, dome light doesn't work. Can't figure out how to get it apart to check bulb. Looks like power comes from R rear cigar lighter which I fixed but also doesn't have power. Can't find where under dash? it gets power. This is a restoration so don't know if wires run to original place but look to be proper wire harness at rear cigar lighter and at dome light switch. I have wiring diagram but can't find wires under dash or where they would connect.Dome light