help...aiming H4's

993.986. · 03-10-2004, 02:29 PM

I just finished installing H4 lights w/Sucro relays and I'm having trouble adjusting them. The two adjustment screws don't seem to adjust the beams as I would have expected. I covered one while trying to adjust the other but I can't seem to aim either one high enough.

Tightening the upper screw seems to bring the light up to a point, then doesn't do anything. Loosening the upper screw seems to de-focus the beam?! Did I turn it too much?? I adjusted them back and forth so much I can't tell. I was probably in too much of a hurry as the first time I turned them on one was high beam, one was low (*!#@) so I had to correct that first. I wish they came with some sort of instructions.

Early_S_Man · 03-10-2004, 03:46 PM

Lester,

You have the Bosch H4 lamp assemblies, right?

If so, remove the assembly and inspect the adjustment screws and interface 'buffer' [section of rubber tubing] between adjustment screw tab and the reflector housing. Screws can be bent, tabs can slip out of the rubber, and the rubber can be cracked or missing!

SilverPoly · 03-10-2004, 03:55 PM

Warren's advice is dead on (as usual

). I'd do as he suggested. Once you figure out if your adjustment screws are okay and working proplerly, here's a website that can help you adjust your headlights.

http://www.autooptiks.com/aiming.html

good luck.

djmcmath · 03-10-2004, 05:03 PM

I'm not sure I could add anything to Warren's wisdom (no surprises there, Warren is super-guru, and I'm just nubly little...), but I didn't understand at all how I could move my headlights around with just two screws until I actually opened the thing up and looked. There's actually a third adjusting screw that doesn't adjust -- it's fixed in place, and may be pulling out when you push back too far with the other two. What I found worked was to pull out the whole assembly, eyeball it into place, then install it and fine tune from there. Also discovered a broken rubber doodad ("buffer", as Warren refers to it) while I was in there. Pull the lights, let us know what you find.

Dan

993.986. · 03-10-2004, 05:45 PM

Thanks fellas, these lights are brand new-just out of the box. I will check them out, but I don't recall seeing any rubber tubing on anything when I put them in.
Whenever you do anything for the first time I guess there's always something you didn't think of, at least for me...... Thanks again.