No power to starter relay.

Gaaaahhhhh! I hate bulkhead connectors. Just got my tyranny rebuilt and drove her home from the shop. Pulled in the driveway to check the fluid and everything was fine. Killed her, went in the house for a cold drink, feeling good about life and my wonderful Dart. Went to start her up and park her in her designated spot and ignition was totally dead. Pulled out the DVM and started checking. All good at the battery and constant hot on starter relay. All good with switch in on/run position. Zilch to start circuit. Turn key to on, jump across starter and she runs. Jump at relay and she runs. Had a new relay so replaced it, still nothing. Crawled under dash and checked at harnesses plugs and wires to/from ignition. All good going to switch and from switch to inside bulkhead connector. Squat at starter relay circuit, yellow and yellow/brown wires. Colors of wires and '73 wiring diagram aren't matching up on my '74. Center bulkhead connector, engine side of firewall, driver's side top terminal appears to be run circuit, hot with key on, no power with key off, dark blue or black wire. Right under that, 2 wires (yellow or brown?) use same terminal. Is this the start/run circuit to the relay? I really don't want to cut open the harness tape to trace from the relay. Can't get my big arse under the dash with a flashlight and both hands, and bad eyes, to get to the top wires to test inside connection. Suggestions? Any and all input is appreciated!