I am wiring up a new layout and want to use a separate transformer to power all accessories (lights, switches, uncoupling track). I followed the directions with my fastrack switch to set it up for auxiliary power (remove track jumper, connect "aux in" and "aux gnd" to auxiliary power line), but now I'm finding that somehow the track power is getting to the accessories. How can I isolate the two circuits?

Hi Larry,
Thanks for the quick reply and the welcome. I have two switches in this layout. I checked them both, and one may be the problem. I did a continuity check and found that on one switch the Aux In terminal connects to the center rail on the track (the Aux Gnd connects to the outer rail as expected). Oddly enough, on that switch the Track Jumper terminal doesn't connect to either rail. I'm guessing that the crosstalk came from here, with the Aux In taking power from the track to supply the lights. Does that make sense? Do I need to send the switch in for repair or is this a simple fix?

Also, thanks for the heads-up on phasing. I hadn't thought that one through enough. Fortunately I haven't connected up both transformers yet. I'll review the wiring to make sure both transformers are connected in parallel.

Leathem

Leathem,

Thanks for the reply back, and for explaining your diagnosis.

It does seem that the one switch is wired incorrectly internally. You have worked out a solution to get the switch to work properly, and that is good for you. You can either leave the switch as is, or open it up and trace the wiring to find and fix the problem. You can use your other good switch as a guide to the correct wiring. If the switch is new and under warranty, bring it back to the place of purchase for an exchange.

Enjoy your trains.

Larry