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I've been trying to figure out this problem for some time now.
I recently replaced the high beam left headlight on my 73. Now the problem is that the low beam wont work, but when I push the high beams on all four work.
Any of the forum members have any suggestions or instructions!!
And before the questions start. I am that guy who tracked down his dads 73 that was all over the news and every Vette forum!!
I believe the low beams have two bulbs inside of them as opposed to the high beams that only have one filament. So it is possible that the low beam filament is burned out, but the high's would still work. As mentioned, you can swap the two low beams and see if the problem follows the bulb, or if stays on the same side and is a wiring issue.