A brown wire and brown wire with white tracer are located on the ignition switch pigtail. They are not on a single connector as you show but a pigtail with various wires running to it then to the ignition switch.
The brown wire gets its power from the ignition switch and runs power to the fuse box accessory fuses. Got power or continuity there?
The brown and white wire is a resistance wire and runs to the fuse area where it goes through the bulkhead connector, turns solid brown then leads to the regulator terminal 4. You can disconnect the regulator connector and check for continuity of the brown and white tracer wire. The wire will show about 20 ohms as it's a resistance wire. If you are ready to do a power test, you can hook up power and check terminal 4 with the key on and engine off. You should show 7-9 volts.
I don't recall connector or extension wire being used in that wire run from the ignition switch to the bulkhead connector. Be on the lookout for one.
That's the only place I can think of where there is a brown wire connected to a brown and white tracer wire. I can't place the single connector.
The only other brown wires are for marker lights, heater switch power, and tach and none of those have a brown wire with tracer on them.
Does your car have a/c? I'm not seeing the wire combinations in the a/c diagram. sorry it won't post???
