@NYC Z-MAN posted:The good news is the board is coded for a backup light and the connection for it is through a molex connector with the correct pin stenciled on the board. I had a spare two pin connector I removed the leads and inserted into the existing connector. I ran the leads out of the locomotive and through a two pin harness back to the tender. I used a standard 3V LED and a 470 ohm resistor. I forgot the LED size, but 2mm is what I think it was. It just slipped up into the housing and seated perfectly. I didn’t glue it as I want to change it because all I had was a blue LED. It has been run quite a bit and stayed put! I’ve since gotten a replacement LED, but it’s one of ‘when I got a roundtuit‘ projects!
I know it's been two years, but I just got one of these loco's, so allow me to kick this horse. I was curious to know why the resistor?
Is it because the voltage off the pin is 5v?
And if so, I assume if I use a 5v rated LED I would not need the resistor.
Thanks in advance for the assistance.
