[Sam Elm]

I've reinstalled my dash, and check the lighting at every step of the way. I reattached the steering column, then went onto the light switch.
I left the light switch hooked up to the harness, until now. I unplugged it to put the light switch itself into the dash, and then plugged it back in. Hooked up neg battery cable, I then pulled "on" the light switch to test.
Interior lights went on for a short time, then went out. Fuse looks and tested fine. I used the voltmeter to check the fuse block for 12v, but don't get any power anywhere on the block.

Is there another fuse or fusible link somewhere that could have gone out?
Does the power for the fuse block go through the light switch?
Where should I test next?

Thanks for your help....