Not so fast!
I picked up a couple of O-36 remote control switches from my local distributer last week. I tested each on a test track to verify that they light up and work. I then flipped them over to re-wire them for constant voltage. When I went to remove the factory installed track jumper, I noticed that the jumper was installed in the wrong position. It was in the AUX GND to AUX in slots, not the TRACK JUMPER to AUX IN slots. Oh well, I proceeded to wire them for constant voltage, installed them on my layout, and got immediate high current overload from my transformer and no operation from the switch (see the first post in this thread).
After a great deal of fumbling around, it was apparent that the switch was not assembled correctly and/or the AUX power slots were mislabeled. Finally, I hooked up the my wiring as ACCESSORY POWER to AUX IN, and ACCESSORY GROUND to TRACK JUMPER. Everything worked!
Would you believe BOTH switches were this way??
Even though I use a common ground, I chose to wire both AUX IN and AUX GND. Had I used only the AUX IN connection and the track for ground, I don't think this problem would have surfaced.
