I had a similar problem that was caused mainly by a poor bullet contact (on the earth side) that had a high resistance. I eliminated the motors by disconnecting them and by testing with a 12v battery and mimicking the switch with jumpers. This proved that the problem was with the loom at the front of the car. As my car spends a lot of time out side being rained on, this was understandable. I replaced all bullets with modern water tight connectors and checked the loom with a meter for duff wires. I also put a separate chassis earth in for the lamps (This seriously improved the speed of the pods and lamp brightness). Since then, no random winking and pods work well. I never worked out how the winking happened but I think the duff bullet connector was forcing something else to earth through the pod motor , thus making it cycle. I also up rated the lamp relays as they were getting hot.