OK. As you can see, every wire is accessible on the S-C 1800 series. Open the phone, go off hook and see (with a meter or butt set if you have 10 VAC appearing on the Red/Brown pair. Check for it at the 66 block and on the phone. If you don't have it on the block, you won't have it at the phone. If you have it at the phone, and the lamp still doesn't light, check for it at the lamp socket, keep working it through till you find the problem.

Sam

"Where are we going and why are we in this hand basket?"