Mars light on P2K E7A with Locksound

[rut-one]

I recently purchased a new Proto 2000 E7A DCC ready. I have an existing Loksound decoder (microXL). I plugged it into the NMRA pin socket and the engine runs fine. Does anyone know how to get the MARS light to function. The headlight works fine. Also I have an un attached pruple wire which comes from the under side of the dcc board. Its covered by heat shrink and I don't want to take it off to check for a label on the solder pad.

Any help appreciated!
Regards,
Mike

 

[Spawn of Chaos]

The purple wire is part of the sound wiring.

Mars lights are doable via programming. Just look up LokSound's CVAR list online (if they have one).