C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Headlight Upgrades

Thread Tools
 
Search this Thread
 
Old May 15, 2020 | 05:11 PM
  #21  
krackenvette's Avatar
krackenvette
Race Director
 
Joined: Jan 2012
Posts: 17,062
Likes: 166
From: United States
Default

I did the hellas years ago via Daniels recommendations. I did not do his harness though. I used Osram bulbs. I can see great. I get flashed allot, then I hit high beams, and they realize it was my low beams.
My headlights are properly adjusted..
One thing to remember is the headlights were designed to spin those light plastic headlights. When I put the heavier ones in, I stripped the gears. Chance, accident/? No idea. So, I pinned the new bronze gears to the rod holding it. It will not be an issue anymore..
Reply
Old May 15, 2020 | 06:07 PM
  #22  
aklim's Avatar
aklim
Team Owner
Active Streak: 60 Days
Community Builder
Liked
Loved
 
Joined: Jul 2004
Posts: 28,466
Likes: 3,288
From: Hartford WI
Default

Originally Posted by dizwiz24
a lot of those websites rig their reviews to favor what they sell and dog what they dont
Ya think? Why do you think I don't believe testimonials and prefer to read a lab report?
Reply
Old May 15, 2020 | 06:08 PM
  #23  
aklim's Avatar
aklim
Team Owner
Active Streak: 60 Days
Community Builder
Liked
Loved
 
Joined: Jul 2004
Posts: 28,466
Likes: 3,288
From: Hartford WI
Default

Originally Posted by krackenvette
I did the hellas years ago via Daniels recommendations. I did not do his harness though. I used Osram bulbs. I can see great. I get flashed allot, then I hit high beams, and they realize it was my low beams.
My headlights are properly adjusted..
One thing to remember is the headlights were designed to spin those light plastic headlights. When I put the heavier ones in, I stripped the gears. Chance, accident/? No idea. So, I pinned the new bronze gears to the rod holding it. It will not be an issue anymore..
One or maybe both of them had a hairline crack and they were with the OEM lights before I changed
Reply
Old May 15, 2020 | 10:13 PM
  #24  
Theman5's Avatar
Theman5
Pro
 
Joined: Mar 2020
Posts: 500
Likes: 27
Default

Two members have used the amazon light and are happy. Here is some not quality pictures of it at night going down the road


Reply
Old May 15, 2020 | 10:49 PM
  #25  
Nomake Wan's Avatar
Nomake Wan
Drifting
 
Joined: Apr 2020
Posts: 1,925
Likes: 610
From: Orange, CA
Default

Originally Posted by aklim
I got a set of Genssi and used THIS to make the LED work without cutting, splicing, etc.
Oh, actually, that's a good point. I forgot to mention that if you swap to LED headlights, it will cause your foglights to no longer work. You need to make a single modification to the fog light relay under the passenger dash (or, as aklim posted, put in a load resistor on the high beam circuit). I don't like adding load resistors because that increases current draw, which just ends up as heat. I swapped LEDs to drop current on purpose.
Reply
Old May 15, 2020 | 11:19 PM
  #26  
Theman5's Avatar
Theman5
Pro
 
Joined: Mar 2020
Posts: 500
Likes: 27
Default

Originally Posted by Nomake Wan
Oh, actually, that's a good point. I forgot to mention that if you swap to LED headlights, it will cause your foglights to no longer work. You need to make a single modification to the fog light relay under the passenger dash (or, as aklim posted, put in a load resistor on the high beam circuit). I don't like adding load resistors because that increases current draw, which just ends up as heat. I swapped LEDs to drop current on purpose.
not sure if that applies to all years. The 1986 has LED fog lights too and nothing was modded

Last edited by Theman5; May 15, 2020 at 11:20 PM.
Reply
Old May 16, 2020 | 06:46 AM
  #27  
Nomake Wan's Avatar
Nomake Wan
Drifting
 
Joined: Apr 2020
Posts: 1,925
Likes: 610
From: Orange, CA
Default

Originally Posted by Theman5
not sure if that applies to all years. The 1986 has LED fog lights too and nothing was modded
It applies to any year that had the functionality where turning the high beams on would turn the fog lights off. It does this by having the ground for the fog light relay pass through the high beam filaments. That way if the high beams are energized, then both sides of the fog light relay would have 12V across them, meaning the relay would turn off.

LED fog lights work perfectly fine on their own.

But if you install LED headlights, there isn't enough resistive load to pull the fog light relay ground low, so it floats and causes the circuit to malfunction (fog lights won't work properly, high beam indicator on your dash will glow, etc). As noted above you can either add a resistive load to pull down the circuit (but this draws additional current and wastes it as heat), or you can cut the light green wire coming out of the fog light relay and connect it directly to chassis ground (what I did).
Reply
Old May 16, 2020 | 09:32 AM
  #28  
rblakeney's Avatar
rblakeney
Racer
 
Joined: Apr 2017
Posts: 396
Likes: 58
From: Katy Texas
Default

Originally Posted by Nomake Wan
It applies to any year that had the functionality where turning the high beams on would turn the fog lights off. It does this by having the ground for the fog light relay pass through the high beam filaments. That way if the high beams are energized, then both sides of the fog light relay would have 12V across them, meaning the relay would turn off.

LED fog lights work perfectly fine on their own.

But if you install LED headlights, there isn't enough resistive load to pull the fog light relay ground low, so it floats and causes the circuit to malfunction (fog lights won't work properly, high beam indicator on your dash will glow, etc). As noted above you can either add a resistive load to pull down the circuit (but this draws additional current and wastes it as heat), or you can cut the light green wire coming out of the fog light relay and connect it directly to chassis ground (what I did).
Aklims solution is the most elegant but I had already started with Euro spec lenses first with the best halogen bulbs I could find in the stock wattage. Nice cutoff but meh. I upgraded the halogens to a well rated H4 LED and am quite happy. But as Nomake states, the fogs would not work. On my 89, I cut the light green wire at each fog and grounded it to the horn ground screws on each side. I already had an HID kit for the fogs and they are amazing. Im done and the road illumination is fantastic.
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

10 Ugly Corvettes That We Still Kinda Love

 Joe Kucinski
story-1

Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

 Brett Foote
story-2

10 Things Every Corvette Owner Needs (2026 Edition)

 Michael S. Palmer
story-3

8 Most "Only Corvette Owners Understand" Quirks and Problems

 Pouria Savadkouei
story-4

10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

 Joe Kucinski
story-5

How Much Horsepower Every Corvette Engine "LOST" in 1972

 Joe Kucinski
story-6

Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

 Michael S. Palmer
story-7

Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

 Joe Kucinski
story-8

150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

 Joe Kucinski
story-9

8 Coolest Corvette Pace Cars (and Replicas) of All Time

 Verdad Gallardo
Old May 16, 2020 | 10:05 AM
  #29  
Theman5's Avatar
Theman5
Pro
 
Joined: Mar 2020
Posts: 500
Likes: 27
Default

Originally Posted by Nomake Wan
It applies to any year that had the functionality where turning the high beams on would turn the fog lights off. It does this by having the ground for the fog light relay pass through the high beam filaments. That way if the high beams are energized, then both sides of the fog light relay would have 12V across them, meaning the relay would turn off.

LED fog lights work perfectly fine on their own.

But if you install LED headlights, there isn't enough resistive load to pull the fog light relay ground low, so it floats and causes the circuit to malfunction (fog lights won't work properly, high beam indicator on your dash will glow, etc). As noted above you can either add a resistive load to pull down the circuit (but this draws additional current and wastes it as heat), or you can cut the light green wire coming out of the fog light relay and connect it directly to chassis ground (what I did).
I had not noticed any issues on the 86'. Will double check operation.
Reply
Old May 16, 2020 | 10:11 AM
  #30  
krackenvette's Avatar
krackenvette
Race Director
 
Joined: Jan 2012
Posts: 17,062
Likes: 166
From: United States
Default

On a side note, fog lights are worthless anyways...
Reply
Old May 16, 2020 | 10:30 AM
  #31  
aklim's Avatar
aklim
Team Owner
Active Streak: 60 Days
Community Builder
Liked
Loved
 
Joined: Jul 2004
Posts: 28,466
Likes: 3,288
From: Hartford WI
Default

Originally Posted by krackenvette
On a side note, fog lights are worthless anyways...
I disagree. It's job is to repel the fog. It creates a force shield that pushes fog away. And it works well with my blinker fluid and muffler bearings
Reply




All times are GMT -4. The time now is 05:25 PM.

story-0
10 Ugly Corvettes That We Still Kinda Love

Slideshow: 10 ugly Corvettes that we still kinda love.

By Joe Kucinski | 2026-06-03 10:34:17


VIEW MORE
story-1
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

A lot of money has changed hands at the online auction house over the years.

By Brett Foote | 2026-06-03 10:21:50


VIEW MORE
story-2
10 Things Every Corvette Owner Needs (2026 Edition)

Slideshow: 10 great gifts Corvette enthusiasts actually want for Father's Day!

By Michael S. Palmer | 2026-06-03 15:43:40


VIEW MORE
story-3
8 Most "Only Corvette Owners Understand" Quirks and Problems

Slideshow: These are the quirks, annoyances, and oddly lovable problems that every Corvette owner eventually learns to live with.

By Pouria Savadkouei | 2026-05-28 09:31:39


VIEW MORE
story-4
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

Slideshow: 10 reasons why the C6 Z06 is still a performance benchmark after 20 years.

By Joe Kucinski | 2026-05-27 17:20:09


VIEW MORE
story-5
How Much Horsepower Every Corvette Engine "LOST" in 1972

Slideshow: How much horsepower every Corvette engine lost in 1972.

By Joe Kucinski | 2026-05-27 16:54:53


VIEW MORE
story-6
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

Slideshow: How to Protect A Convertible Top: 10 DOs & DON'Ts

By Michael S. Palmer | 2026-04-03 00:00:00


VIEW MORE
story-7
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Slideshow: The 10 most explosive Corvettes ever built based on power-to-weight ratio.

By Joe Kucinski | 2026-05-20 07:23:03


VIEW MORE
story-8
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-9
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE