Separate High/Low Beam Headlight Adj???
Thread Starter
Advanced
Joined: Mar 2005
Posts: 58
Likes: 0
From: Rochester MN
St. Jude Donor '07
Separate High/Low Beam Headlight Adj???
I can't find anything that allows for a separate adjustment of high and low beams. The problem that I have is that the low beams are fine, but the high beams shine about 20ft up off the pavement at about 50 feet ( I can see the beam in the trees on the side of the road).
The bulbs seem seated OK, but ??????? Any ideas?????
The bulbs seem seated OK, but ??????? Any ideas?????
Race Director
Joined: May 2005
Posts: 15,960
Likes: 21
From: West Norriton PA
St. Jude Donor '08
I can't find anything that allows for a separate adjustment of high and low beams. The problem that I have is that the low beams are fine, but the high beams shine about 20ft up off the pavement at about 50 feet ( I can see the beam in the trees on the side of the road).
The bulbs seem seated OK, but ??????? Any ideas?????
The bulbs seem seated OK, but ??????? Any ideas?????
What bulbs are you running ?
Thread Starter
Advanced
Joined: Mar 2005
Posts: 58
Likes: 0
From: Rochester MN
St. Jude Donor '07
Tech Contributor
Joined: Dec 2003
Posts: 19,384
Likes: 87
From: Horncastle Lincolnshire, England
2023 C5 of the Year Finalist - Unmodified
The lamps are boresighted by the position in the headlamp housing. Adjust high and you adjust low in sympathyI'd say it has to be something to do with how the individual lamps are seated in the housing. A tweak should fix it.
Thread Starter
Advanced
Joined: Mar 2005
Posts: 58
Likes: 0
From: Rochester MN
St. Jude Donor '07
I didn't look that close at the time. I could have missed that real easy. Will check in the morning... Seems like a logical answer...
Pro
Joined: Dec 2005
Posts: 619
Likes: 2
From: Destin FL
I remember someone else about a year ago posting a thread with this exact same problem. I can't remember if the cause or solution was ever identified. Seems like I remember them using the phrase "spotlighting in the trees" or something like that. You might try doing a search here on the forum to see if you can find that other thread.
Tech Contributor
Joined: Sep 2005
Posts: 1,731
Likes: 82
From: New Market AL
When I added aftermarket HID bulbs, I had to adjust the housing up for the new low beams. Now the high beams are "tree spotlighters", but I really don't need high beams with the low beam HIDs. I was careful not to aim the HIDs too high, so I very rarely get anybody blinking their highs when they are coming toward me.
Thread Starter
Advanced
Joined: Mar 2005
Posts: 58
Likes: 0
From: Rochester MN
St. Jude Donor '07
When I added aftermarket HID bulbs, I had to adjust the housing up for the new low beams. Now the high beams are "tree spotlighters", but I really don't need high beams with the low beam HIDs. I was careful not to aim the HIDs too high, so I very rarely get anybody blinking their highs when they are coming toward me.
I'm afraid that if I adjusted the high beams properly that the low beam would be aimed about 10 ft in front of my Vette (probably an exaggeration), but they would not be where they should be. They would be aimed very low.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
Thread Starter
Advanced
Joined: Mar 2005
Posts: 58
Likes: 0
From: Rochester MN
St. Jude Donor '07
I remember someone else about a year ago posting a thread with this exact same problem. I can't remember if the cause or solution was ever identified. Seems like I remember them using the phrase "spotlighting in the trees" or something like that. You might try doing a search here on the forum to see if you can find that other thread.
