I am in the early planning stages of wiring up my 39 GMC and the switch that came in it doesn't have a key so I cant get the existing lock cylinder out without hacking it out. Long story short, I need to get a new ignition switch. Looking at my master parts book, I haven't been able to find a NOS switch on ebay but there's a ton of other switches from this era on there.
Back when new, my truck (I think) would have came with an ignition switch with two screw terminals on the back and a 3rd shielded wire that went to the coil. I'm just a little confused because my 39 GMC only has the two screw terminals on the back. I can only assume the switch had been changed sometime in the past and rewired. My truck has a bunch of wiring missing so I'm not sure how the two terminal switch was wired to the coil.
My question is: Do I need a two terminal switch or should I look for a 3 terminal switch?
