66 Cuda: horn works, no other power, no start

Just tried that, no luck, but thanks for the input.

I'm starting to wonder about the ignition coil--think that's a possibility?

Quick test revealed 0 ohms across the terminals, and I just tried the spark-plug-in-the-output-wire test and got no sparks when I jumped the starter relay.

Don't know why a bad coil would fry the relay though....?