Spectrum F40PH with NMRA Socket

[DCCDoug]

Hi, New to the Forum.

I have an "inherited" Spectrum F40PH, apparently "DCC Ready" with an 8-pin NMRA plug and an installed lenz decoder. The Loco has 2 roof mounted LED Beacon lights wired to 4 pads on the side of the Bachmann circuit board. These lights blink in tandem when the decoder activates its "A" output (Default function 0), but other functions produce no response.

Is there a spec sheet for this loco or does anyone know the pin assignments for the onboard NMRA socket? (I have tested the decoder independently and it functions as it should.)

Thanks for any help.