Things got busy here, but I’ve finally had a chance to run through every connection the wiring diagram (highlighted in yellow). The failure seems to be the connection between 87a at the relay terminal and its corresponding terminal on the cruise servo. There’s no continuity, which also explains the open circuit when I try for a connection between 3 and 7 on the cruise amp harness when the relay is and the ignition is on. I’m working from the 1984 diagram now because it looks more like what I’m seeing in the system (e.g., no third piggybacked wire on my clutch pedal switch).
I have a 12v tone generator that gets me as far as the bundle under the transmission tunnel. After that, I can’t pick the tone up anywhere between there and the fuse panel. If anyone has any advice on where this white with green striped wire runs around the dash, floorboards, etc, I’d be grateful.
