I have a 2012 Sportster 883, I put the Arlen Ness Direct Bolt On LED Turn Signals for the rear. It is throwing a code B1121 & B1122, I called Arlen Ness and they told me the turn signal module had to be reprogrammed to accept the LED lights and there is a way to do it threw the buttons on the bars. Does anyone know the procedure or anyone ever go threw this? Any help would be great. Thanks

 

Check out this thread. This should be what you are looking for!

Edit: The link doesn't seem to be working. I'll just cut and paste the steps.

step # 1. move handle bar kill switch to off position

step # 2. turn your ignition key: on-off, on-off then on

step # 3. hit the left turn signal twice.
your turn signals and indicator light will flash 1 - 3 flashes

step # 4. hit the right turn signal once.
turn signals and indicator light will flash once.

step # 5. hit the right turn signal once.
turn and indicator signals will flash twice.

step # 6. hit right turn signal once.
turn and indicator signals will flash three times.

step # 7. hit left turn signal once.
turn and indicator signals flash to indicate error code
(see error code thread)

step # 8. to now clear codes, hit left turn signal and hold down for 6 seconds until confirmation.
turn and indicator signals flash twice.

step # 9. turn the ign switch to off

 

awesome thanks i will try it out and let you know.

 

I just did it, the directions were spot on, the security light went away but as soon as i hit the turn signals the light comes back on

 

Hmm... I'm not sure what you could do next. I just pulled those steps above from a Google search.