i put a set of cd moonshinez on the front of the wife's bike. left the stock incandescents in the rear. no flashing fast, no red key icon. works fine, no load equalizer.

2012 roadglide custom

 

thats what i found with my 2010 fxdc

 

Looks like a 50/50 split on this one...why not try the rear LED's and see what happens. If they work w/o equalizer then you're good to go. If not, buy and install later. Pretty simple install...wire to battery and signal harness.

 

when i did mine, i had to let them blink for a few mins. to let the TSM re regulate the flash

 

OK, guess I will just install and see what happens. Seems about 50/50 whether I need one or not. Didn't know there were that many different electrical systems on a SG.....lol

 

you have to give the TSM enough time to adjust, when i did mine i turned the blinkers on and let them blink.. they WILL BLINK FAST and then start to slow down, by the time it adjusts the flash may be just a hair faster then what it was.. you may end up with 1 extra flash for every 10-15 flashes i dont remember