Since many toy train operators, including us, like to operate their layouts at times with the train room lights turned off, it's handy to have illuminated indicators on your layout's control panel.  As shown on our Toy Train Layout Wiring and Control Panel Page, our Lighthouse Cliff Rail Road, like many other layouts, has track turnouts (aka "switches") with LEDs on their pushbotton panels to indicate if the track is set to the straight or diverging path.   In the case of accessories, street lights, etc, we used illuminated rocker switches which glow blue to show when certain items or circuits are powered. 

After a few of our photos were posted on the O-Gauge Railroading Forum, we were asked more than a few times where we found these rocker switches and how did we wire them on the layout.  The rocker switches came from Mouser Electronics under Stock Number R13-112AH-W4 . 

These rocker switches have four wires, one red, one black (or green), and two white.  The two white wires go to a small square box which also has two white wires coming out of it.  The red and black (or green) wires are your standard positive and negative wires.  The white wires and the small square box control the power that illuminate's the glow ring around the switch to indicate power on or power off. 

Now for the real fun.  The switches do not come with wiring or instructions, so here's a copy of our wiring diagram as drawn when we were wiring one in place.  For illustrative purposes, we're showing this switch as controlling a simple minature light bulb.  On our layout, we use two of these rocker switches to control the 24-position terminal blocks we used to tie our accessories, street lights and structure lights into the transformer power.

This may not be the world's greatest wiring diagram, but it worked for us and the other people who asked for it by e-mail.  We hope it helps you in your wiring work.