Since I am off work this week for Christmas I decided to tackle rebuilding my 1922 combination switch. I thought I would be ahead of the game by buying some new switch levers and new backing case from Bob's but I soon realized that the 1922 switch was not alike in any way to later switches so these new parts were of no use to me. I also had purchased 4 additional switches over the past year so that I would have plenty of parts to pick from while trying to build one good switch.
Even after rebuilding each Delco switch (One for the Master and one for the Standard) the dash light switch is still a bit touchy to work.
Dash light switch button at the top of the casting.
Switch contact (long tab) Needs to be well cleaned for good contact. Burnt ignition switch contacts.
Replaced contacts and then I had to make some epoxy to fill the charred recessed sections of the Bakelite plate.