@C.Vigs posted:Hi all,
I have an Atlas O GP15 with TMCC, Conrail 1656, item number 0329-1. I purchased it off of ebay a while ago with no-functioning headlights. Everything else works - TMCC, sounds, and electrocouplers.
Marker lights and headlights are attached to the same PCBs, and the marker lights do function. The photos below depict the problem.
Front headlight and marker lights while in forward (the headlight LED is still in the housing in-between the number boards):
Front headlight and marker lights while in reverse:
Rear headlight and marker lights while in forward:
Rear headlight and marker lights while in reverse:
What I've tried so far:
1. Aux2 on my Legacy remote in TMCC mode. IIRC this is a lighting command. Tried it while the engine was powered up in both directions.
2. Conventional operation - no change
3. Disconnected the wiring harness and checked continuity of each wire, from the main TMCC board connectors to each lighting PCB. All showed good.
4. Cleaned contacts on the main PCB and reseated the connectors.
What voltage do these LEDs operate at (so I can test them with a direct DC input without risking any further damage)?
Any other ideas for testing and troubleshooting?
As a last resort, does anyone know where I can get a new light package / wiring harness? On these engines the front and rear lighting PCBs and the roof mounted TMCC antenna are all one harness. I see it drawn on the Atlas part diagrams on their website, but it is not assigned a part number and doesn't appear to be available from their parts list.
Thanks,
~Chris
Ifit is two LED's check the connections. I have had a few where the connection between the LED's was bad. Set a meter to DC lowest setting and see if you get a bump. Also since they both do not work (front and back) the chances are good the board is a dud. Take a close look at the solder joints on the board. Lionel has had voltage as low as 1.5 to up too 14 volts. stay very low a A battery would not harm them with a quick touch. I bet thinking that the LED's are ok.
