We have a 94 Outback Wagon and the headlights will go dim and then go back to normal a few moments later and then back dim and then normal and repeat. We replaced the alternator about 6-8 months ago and just had it checked yesterday and was told it was fine. I thought it might be the A/C pump turning on and off but it didn't make a difference. Is there something else that may be cycling on and of causing a power drain? Anyone heard of this happening?