Found the issue! I had cleaned the starter ground and there was no voltage at the starter button.
Dalby prompted me to look closer at the wires on the ignition connector block, going into the loom. At first glance they looked OK, if a bit hard. I pierced the insulation and measured the voltage on the red wire going into the connector and it measured 13v. I pulled the wire hard and it came out the terminal. The copper(?) around the wire had almost completely dissolved. You can see the remains on the wire in the attached pic and the rest of the terminal.

Dalby prompted me to look closer at the wires on the ignition connector block, going into the loom. At first glance they looked OK, if a bit hard. I pierced the insulation and measured the voltage on the red wire going into the connector and it measured 13v. I pulled the wire hard and it came out the terminal. The copper(?) around the wire had almost completely dissolved. You can see the remains on the wire in the attached pic and the rest of the terminal.


