Good Evening,
I have been hooking up my 148 Dwarf signals to a three position (off-on-off) switch. My other two work fine. This one I hooked up tonight, the first time, only the green light worked. The next time, only the red one. I know I am messing something up, here. Does anyone have an idea what wires I may be crossing, here? Thank you for looking at my question.
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From the looks of the bottom of the signal, terminal 'B' looks to be common. Hook transformer leads to B-A and one bulb should light, and B-C should light the other bulb. If not, check against another signal that works properly. Also, swap out this signal with one that works, and check for proper operation. Next, check that your switch is identical to the others, and does not have a different contact arrangement.
Larry
Bob you need to use an on-off-on switch. Hook your green wire to either (ON) side terminal and red wire to the other (ON) terminal and the white or black wire is your power wire and there is two power wires hook them together too. Then run a wire to the center switch terminal to ground on power supply and then run another wire from power supply to power wire on the signal. Then you can change your signal from green to red.
You need a SPDT switch with normally open contacts.
Top lead of switch goes to 'A' terminal on signal.
Center lead of switch goes to common of transformer.
Bottom lead of switch goes to 'C' terminal of signal.
Transformer power goes to terminal 'B' of signal.
Larry
Thank you, fellas. I figured it out. I had the white wires crossed. Upon close inspection, I found that the white wire for the red bulb was connected with the red wire for the green bulb and vice-versa. Thanks for the troubleshooting advice!
Your welcome!
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