I have an electrical issue with my FLHT. The left rear turn signal does not work. I replaced the bub thinking that was the issue, since the cluster and the front signal have a rapid blink. With a car that usually means the bulb is blown, that was not the issue. Next I pulled the turn signal housing off and checked the connectors right at the bulb, still not the case. When I unplug the rear electrical wiring harness under the seat and turn the signal on, there is a regular flash, not a rapid one. So, this has me at odds of what it could be. Anyone with any suggestions? Thanks.