I recently bought an 87 Sportster 1100 XlH and it seems like the only way my turn signals work is if i hold them in..in doing so they blink fine but I'm wondering if this is usual or something i need to fix.
The TSM controls the flash, if your bike only has a signal-stat type flasher you have to hold the button.
You can update to a Badlands electronic turn module so the blinkers flash automatic for approx. 12 seconds after the button is released. Also has 4 way flash.