Electronics

If I'm following you right, the two green wires in the ECU connector are direct to frame grounds, so no voltage is possible on those unless/until the ECU is plugged in and key is on.   While the Green/red neutral switch to ground wire completes the circuit for the neutral light and the N indicator on the dash, as well as provides the ECU with a neutral gear signal and on most Hondas completes the circuit for the starter solenoid, so the voltage present that overwhelms the multimeter resistance mode is being provided by the dash display. If there were no voltage on the Green/red (in neutral with the key on) the neutral light would not have lit up in your video. You can find out how many volts are on that Green/red gear position switch wire by unplugging the switch and probing from the Green/red to ground in DC volts mode, with the key on.   Multimeters cannot handle voltage while in any resistance or continuity modes. If voltage is sufficient the meter will fry while in resistance mode. That's a well known fact... That's why multimeter instructions always remind the user to use AC volts mode on high range when probing an unknown circuit. Then drop to DC volts mode to insure that no voltage is present before resuming testing in other modes.

Yes for sure Ken, anything above the Detroit metro area is a good place to visit and live...... 

Thanks bcsman.  I camp up in the Port Elgin area also but I have camped on your side of the lake also.  Michigan is a beautiful State, especially north of Port Huron.

Hey Ken, welcome to the forum.  I am close to Ontario, in Michigan, right across the Blue Water Bridge.  I have visited Ontario many times and used to camp up by Port Elgin.  There is alot of good folks here and hopefully you can get help if and when you need it.....

Electrical is not my forte, but with a good service manual, my peak voltage meter, and some probes I can usually pick my way through this stuff. While I kind of grasp what you are saying here, forgive me if I seem skeptical. The reason for that is while the green/red wire in the harness for the gear position switch loses ground when I turn the key on, BOTH of the green ground wires at the ECU do NOT. I back probed those, and used the same ground as when I tested the neutral position wire. This is one of the items Honda lists in the trouble shooting for no peak voltage at the coil.