R = Rear Headlight (generally a yellow wire)
F = Front Headlight (generally a white wire)
L+ = Common. (generally the blue wire) This is positive leg of the circuit. if you are planning on using LED's the Anode(s) connects to this.
The cathode (minus side) of the LED will connect to the R or F.
Colorado Front Range Railroad: http://www.coloradofrontrangerr.com/
I found an old decoder without wires in my box. I believe it is an old basic Lenz.
I know the M+ and M- and T+ and T- refer to motor and track etc. on the solder posts,
but I can't recall what the R- F- and L+ mean as regards lighting and common.
Thanks for any tips.