I have a 2006 FXDC with eternal wiring. Planning to go with internally wired T-bars. My question is, if I want to keep my turns on the bars, do I have to change out the lower switch housings to accommodate the turn signal wires? If so, does anyone have a part number for those? Thanks in advance.

 

No, you'll need wires coming back up for the signals,, and maybe another hole.
The switch wires go down to the harness routed to the turn signal flasher circuit and come back out to feed the signals.

 

When I did my internal wiring, I didn't have to change the housings to anything different... although I did go with all chrome switches/housings...