My 91 348 is having some strange headlight issues similar to what the search results have shown. However, it is definitely not a moisture issue due to not being around water for 3 years and is kept in a climate controlled garage. I've tried swapping relays that results in different issues rather than fixing the problem With all relays in correctly the headlights will pop up and down continuously even with key out of ignition. Removing the "LH headlight relay" and/ or "RH headlight relay" (0332204101) does nothing. Removing "control headlight relay" solves this but of course makes them inoperable at that point. If I swap the AC relay (0332014113) with the "control headlight relay" the motors will stop popping up and down with key out of ignition, however, once key is turned to "ON" the headlights will begin popping up and down again continuously until key is turned "OFF" I've also tried swapping several of the (0332204101) relays with others of the same part number with no change. Do both hi beam and low beam light bulbs need to be in the headlights and operation for the motors to work correctly? I can't imagine this being the case and I assume it is something else entirely. I don't think it is the headlight stalk as all positions seem to work correctly according to fog light, turn signal, windshield operation as well as high beam dash light in correct order. Thanks for any help.