Resolved Question: I have a 1999 Harley Davidson FXST Custom Softail Right turn signals not blinking have working left turn signals and four way flashers on all 4 turn signals. Replaced turn signal module thinking that was the problem also replaced all 4 bulbs.Submitted: 3 years ago.f you have a flashing output for the 4 ways but none for the right turn, the module is bad. ideally....you have a friend with a 1996-1999 Harley that uses the same module. you can then switch out modules for comparison. big twin, baggers and sportsters....all the same.