I've been commuting over the Woodhead bypass for the last week (an unlit hilly single carriageway across the Peak District, between Manchester and Sheffield). While driving at night, on a few occasions, oncoming traffic has flashed me, presumably because one or both of my headlamps are very bright. At first I thought it was people who didn't like Xenon lamps, but now I'm beginning to reconsider. Things I know:
1) The motors on the levelling mechanism work, I can see them cycle when I start the car. I can also see the lamps slowly changing angle as I drive, it's quite noticeable on the back of a white van, for instance, as I go over bumps.
2) The car body seems lower at the back - by around an inch or so. This may be because I have an lpg tank and spare wheel in the boot, or perhaps the springs have broken.
3) The headlamps look fairly horizontal and at the same height when parked on flat ground and shone against a wall
4) The beam cutoffs aren't anywhere near as defined as I've seen on other cars with projector headlamps
5) The lenses are pretty clear, and the washer mechanisms are fine
6) Experience tells me that while driving, the headlamps may well be a little high - I can't see much of a pool of light on the road ahead.
Tomorrow I'm going to check the two height sensors on the car's offside, as well as the rear springs. Does anyone have an alignment guide for the headlamps? I'm fairly certain that the previous owner had the bumper off to repair something or other, as it's a slightly different colour than the rest of the car. Perhaps he didn't reinstall the lights correctly - in which case, perhaps I just need to angle the lamps down. is that done with the plastic screw on the top of each lamp housing?
Also, I noticed that there is no rubber seal or strip between the bumper and headlamps (there's one between the bonnet and headlamps) - one would presume that that area would be sealed against water ingress. Can someone check to see if their car has them there?
/edit - found an official Lexus alignment guide