I have had the steering column apart a number of times for various reasons. This problem predates those times. Thanks.
I will start by narrowing down the circuit via Vikki's suggestion as soon as I get some time. Hopefully this weekend, but family obligations are taking up a lot of spare time right now.
Thanks for all the suggestions.
68' Firebird 400 convertible, numbers matching, solar red w/ deluxe parchment interior. 66' Pontiac Ventura Hardtop 66' Pontiac Catalina Convertible