@Roger Elliott posted:...The Signals that I have use AC since I tried a 9 volt battery and got nothing but when I touched the signal to an AC source they lit up.
I'm still not clear on what you have.
You have a 3-wire signal that has a red and green LED (not bulb).
You want to connect the 3-wire signal to a FasTrack Remote Switch to indicate switch position.
You are using a Controller (guts of which shown above left, photo from this OGR thread) with a 4-conductor cable to the FT switch.
The issue is how to connect the Yellow and Black wires to your 3-wire signal depicted above...and what components (relay, resistor, etc.) might need to be added.
Correct any of the above. Then here's my questions:
Did you open up the 3-wire signal and can you post a photo of the guts...or post a schematic if you have one...or give us a manufacturer item # if it has one?
You say you hooked up a 9V (DC) battery to the 3-wire signal and nothing lit up...but then you hooked up AC and "they" (both?) lit up. For these tests, which wires (call them 1, 2, 3) did you apply the voltages to and did you try all combinations in both directions when using DC? In other words, for 9V battery 1-2 and 2-1, then 2-3 and 3-2, then 1-3 and 3-1. For AC, it's OK to simply test 1-2, 2-3, and 1-3.
For the AC cases, I assume this was a train transformer and what was the voltage setting?
