On my swing gate, I'm running two tracks over it. Do I need to use a micro switch on each end of each track at the ends of the gate which would be 4 for 2 tracks, or can I use 2 micro switches for both tracks, one at each end of the gate? Also, does it matter which rail has an insulated rail joiner put in on each track on both sides of the gate? I don't understand the wiring of this all too well from the bus wires to the track, to the micro switches, so any help on this too would be appreciated. Thanks.

I am trying to take the existing wires for a DC layout and connecting them to bus (red/black) to go to a DCC layout.  I have a multi meter that I normally use to check for shorts.  If I put the meter on Ohms and touch the same rail with the red and black probes I see the needle swing to the full right (which I understand is Good).  However, if I place the the red and black probes on opposite parallel tracks [one being the red bus and the other the black bus\ I also get the same swing in the needle to full right on the dial.