I have a BLI ac4400 locomotive that the ditch lights were very dim on.The ditch lights were attached to a circuit board which I removed, (#2 photo) fed by a black, red, and yellow wire. I tried to wire (2) new led's (4) wires to these (3) wires and have not had any success. Has anyone on here had success wiring up led's on BLI locomotives? See the attached photo's any help is appreciated. Regards Gene
Probably going to be hard for someone to help unless they recognize the loco. Too many unknowns. Is this a DC or DCC loco? Is that a light board or is that a decoder. Were both ditch lights on that board? I think I see one. I'm guessing that you have a decoder. One wire to the light board is power. The other two control two LEDs for the ditchlights. If they flash I'd think you would need two wires to functions on the decoder. Most likely the yellow is one. Strange that the black is marked positive and red negative on the board. The picture isn't good enough to see for sure but I think I see SMD resistors. If so they might be controlling the intensity and could be replaced for lower value ones which would make the lights brighter. Before doing that you would have to check the current so that you don't change them to ones that are too low. If the three wires are for two LEDs you could use them with new resistors and LEDs but without knowing more about the wiring, decoder, etc. it is hard to help, at least for me. Sumner
Sumner, Thanks for replying, the loco is dcc whatever brand decoder BLI uses the board did have (2) led's on there one came off. I was told that the red and black wires are the + and the yellow is -. I had the new ditch lights flashing at one time the way I have it wired now in the pictures but they would not alternate they both would flash at the same time. The black wire came loose from where it was soldered to so I re-solder it and now I can't get the led's to work at all I'm very frustrated with this project lol. Regards Gene
Normally for ditch lights (I don't have any) you need a 4 function decoder. A function for forward light, rear light and a function for each ditch light. The three wires would be one common DC+ that goes to each ditch light. The other two wires are connected to a resistor, a ditch light and a function output on the decoder. If you have two lights going to one function then they will turn on/off together not alternating (sounds like what you have now_. So one wire is the common power. Another wire goes to a resistor and a ditch light and decoder. The third wire goes to another resistor and the other ditch light and a different function output on the decoder. Then you set the CV's to activate them as ditch light. You need to find the common and then find which functions on the decoder the other two go to and wire them with a resistor and LED. Sumner
