Have a John Deere 60.  Just got it painted up.  Now going through the wiring.  Anyone know which lights should illuminate on each setting.  I= ignition, L=? D=dim B=bright?  Has two front lights, and one rear that contains the red bulb for tail as well as the work light, and then the dash light.  When should the rear work light come on, I'm not getting any power in any position.  I do get power to the red bulb.  What does the L stand for?