Trouble with directional headlite

I'd suspect that board is possibly a constant voltage board, the directional control would come from the LCRU.  If you look at the diagram for the Pictorial Diagram for 18313 GG-1 you'll see that directional headlights are provided for on the LCRU.  The schematic is on the last page.

The part is most likely a MAC97 Triac.  Digikey has them.  It may be that the lighting is set for steamer, and all you need to do is reprogram the features.  I believe in program mode you can enter AUX1 then 5 to get directional lighting.

Jon, what's the separate little board?  I'd expect the triac to be on the LCRU.

Martin does not describe a separate little board. He is describing the LCRU with the PIN like connections with a Triac behind the pin.

OK, I guess I was reading it differently.   If it's on the LCRU, then I'd have to go with your call, I've replaced a number of those for lights and couplers.

Hope so, I have designed enough of Lionel's electronics to know

I'll bet you have Jon.

I went to Digikey's web site and found about 20 plus MAC97 Triac's, any guess on which one it is???

http://www.digikey.com/product...6385?k=MAC97%20Triac

Thanks for the responses,

Marty

Any MAC97 A4 or MAC97 A6 - will work. 

Thank you very much for the info...

Marty

I use this one from Digikey, it's worked fine in a number of installations: MAC97A5