Recently I got some new lights for my 03 WRX. Today I got some better bulbs. Everything was fine until I started to adjust them. Then things went haywire.
I had them adjusted equally but they were too high. So I lowered the right one. no problem.
(Just so you know I now have 4 headlights). While I was adjusting the left low beams they went out and the high beams came on very dim. I didn't even turn them on! I looked over at the right side lights and the high beams were on very dim too. As well as the low beams, which looked normal.
I checked the bulbs 1st. The old bulbs did the same thing as the new bulbs,so that rules out the bulbs.
Then I unplugged the lamp assembly on the left and the right lamp acted normally. So,nothing wrong there.
So next I checked the connections to the bulbs by removing them,connecting them to the power and grounding them to the side of the socket. The bulb lit dimly. I did the same thing to the bright bulb and got the same thing.
All the while when testing, the brights on the other lamp would come on dimly.
The sensation is as hard to forget as it is to ignore!!!