Fixing an ignition switch that didn't work, I installed the backing plate that I got eight years ago and hadn't ever used until now. When I got it in, I found that it didn't work either.
Upon closer inspection I found that the terminals were slightly recessed into the phenolic plate so the moving contacts didn't touch them. The cure was reducing the thickness with a sander to expose the brass. It works now.
Sometimes a switch doesn't work because the original backing plate is warped. You may not need to replace it. It may need nothing but to be sanded flat.
Hmm, the way my Dad fixed a switch was to trim off the side branches so it was just a single, supple piece, and then commence to whalin'
(Actually, my Dad never took a switch to me, but I did get a paddling or two--this just hit me when I read the thread title.)
That plate is the worst part of the re-build kits being sold. The last time I did one with a kit I used about half the parts and my fix for the plate was the same as Steve's. Still it was never a smooth operator.
The kit I bought had a worthless plastic plate. It wasn't big enough to use as a door stop so I just threw it in a can with the other junk parts. I haven't decided what to do next.
Maybe the quality has changed in the switch rebuild kits but the one I bought a few years ago for my T works fine. HMMM??
Where from John?