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

headlight issue

Thread Tools
 
Search this Thread
 
Old Jan 2, 2013 | 11:38 AM
  #1  
howardjm's Avatar
howardjm
Thread Starter
Instructor
 
Joined: Nov 2012
Posts: 160
Likes: 0
Default headlight issue

89 C4, left headlight will open using the headlight switch but will not close when turning lights off. Any suggested ideas?
Reply
Old Jan 2, 2013 | 12:57 PM
  #2  
TTA579's Avatar
TTA579
Instructor
 
Joined: May 2012
Posts: 194
Likes: 1
From: Lawndale CA
Default

Originally Posted by howardjm
89 C4, left headlight will open using the headlight switch but will not close when turning lights off. Any suggested ideas?
Unplug the working headlight motor and verify that the malfunctioning motor is operating (attempting to close) when you shut the headlights off. If you hear the motor running, read up on replacing the gearbox bushings.

If the motor is not running, you'll need to familiarize yourself with a multimeter and find out where the the "open" is.
Reply
Old Jan 4, 2013 | 04:26 PM
  #3  
CINNEMAN's Avatar
CINNEMAN
Safety Car
10 Year Member
 
Joined: Jun 2007
Posts: 4,309
Likes: 1
From: Inside Hoover Dam NV-AZ
St Jude Donor '14
Default

If it is the headlight bushings here is a great video on the repair:


there is also bushing syou can get at home depot for pennies, i used them and they have been working fine for quite awhile, i was going to order from vette shop, but they wanted like $8 to ship, why they couldn't put them in an envelope is ridiculous.
Reply
Old Jan 4, 2013 | 05:35 PM
  #4  
Red89'-L98's Avatar
Red89'-L98
Burning Brakes
10 Year Member
Conversation Starter
All Eyes On Me
 
Joined: Mar 2012
Posts: 768
Likes: 22
From: California
FL Events Coordinator
St. Jude Donor'13
Default

Originally Posted by howardjm
89 C4, left headlight will open using the headlight switch but will not close when turning lights off. Any suggested ideas?
I also have the same exact problem as you and if we are in the same boat the bushings and gears are not bad at all. Someone told me they think it is the brushes up inside the motor itself not inside the gear and I have not gotten around to replace them to confirm it yet.

Start off replacing your bushings and gear if needed and tell us how it works though. Just use the video earlier posted, I used it also to do my bushings.

Originally Posted by CINNEMAN
If it is the headlight bushings here is a great video on the repair:

http://www.youtube.com/watch?v=sPj1kJm4AnU

there is also bushing syou can get at home depot for pennies, i used them and they have been working fine for quite awhile, i was going to order from vette shop, but they wanted like $8 to ship, why they couldn't put them in an envelope is ridiculous.
I had one motor bad and one good so I decided to replace the bushings on both of them. I went to home depot and replaced them with the metal nuts that go on the end of a bolt and made sure they stacked up the same height and size around, never have to worry about them going bad again now
Reply
Old Jan 4, 2013 | 05:49 PM
  #5  
GREGGPENN's Avatar
GREGGPENN
Race Director
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Nov 2003
Posts: 12,221
Likes: 446
From: Overland Park Kansas
2020 Corvette of the Year Finalist (appearance mods)
C4 of Year Winner (appearance mods) 2019
Default

Rebuilt my (1989) gears about 3 years ago. Recently, left headlight doesn't flip closed again. Pull headlight ****, push in again...and it closes.

Kind of took the gear/bushing repair to be a permanent fix over factory quality plastic parts. Doesn't seem old enough (or used enough) to be bad again. (Plus, they're not creeping closed or jumpy. Smooth closing on 2nd tries.)

It's only messed up a couple of times in the past month.

I assume it's more likely to be a relay thing this time. Do relays control both open/close events? 1/side, 4 total?
Reply
Old Jan 27, 2013 | 10:17 PM
  #6  
Brunette Mom's Hubby's Avatar
Brunette Mom's Hubby
6th Gear
 
Joined: Jan 2013
Posts: 6
Likes: 0
From: Louisville Kentucky
Default

Great video and nice job.
I will be doing this repair on my '89

Where did you buy the bronze gears?
Reply

Get notified of new replies

To headlight issue





All times are GMT -4. The time now is 04:29 AM.

story-0
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-1
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-2
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
story-3
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

Slideshow: Ranking the top 10 Corvette engines by torque output.

By Joe Kucinski | 2026-05-05 11:58:09


VIEW MORE
story-4
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

Slideshow: A Corvette pace car nearly matching IndyCar speeds sounds exaggerated, until you look at the numbers.

By Verdad Gallardo | 2026-05-04 20:03:36


VIEW MORE
story-5
Top 10 Corvettes Coming to Mecum Indy 2026!

Among a rather large group of them.

By Brett Foote | 2026-05-04 13:56:44


VIEW MORE
story-6
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

Slideshow: the top 10 things Corvette owners want in the C9 Corvette

By Michael S. Palmer | 2026-04-30 12:41:15


VIEW MORE
story-7
10 Revolutionary 'Corvette Firsts' Most People Don't Know

Slideshow: 10 Important Corvette 'firsts' that every fan should know.

By Joe Kucinski | 2026-04-29 17:02:16


VIEW MORE
story-8
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

Slideshow: Should you buy a 2020-2026 Corvette or wait for 2027?

By Michael S. Palmer | 2026-04-22 10:08:58


VIEW MORE
story-9
2027 Corvette vs The World: Every C8 vs Its Closest Competitor

Slideshow: 2027 Corvette lineup vs the world.

By Joe Kucinski | 2026-04-24 16:12:42


VIEW MORE