I have the same issue on my Cuda, only affects the drivers signal lite. I have relamped and correctly clocked the bulbs. I have cleaned out the sockets as best as I can. When looking at the schematics I have trouble following the grounds for the park/turn signals. Are they in the housings themselves ? What switches over to ground when the lights are on and the turn signal is applied ? Oh and I have continuity to both contacts in the sockets. I wouldn not pull the cluster out definately in the housing.
