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I had a problem with my switch where the headlights would not come up consistently each time. So, when I disassembled it, I noticed that the four contact posts were contaminated. I filed them to clean them up but, there was not enough material on the posts to make good contact when the switch pressed and so the headlights would work. Therefore, I had to replace the switch. So, my point is that you may need to replace the switch.