C5 Tech Corvette Tech/Performance: LS1 Corvette Technical Info, Internal Engine, External Engine, Tech Topics, Basic Tech, Maintenance, How to Remove & Replace
Sponsored by:
Sponsored by:

Headlight door motors

Thread Tools
 
Search this Thread
 
Old Nov 14, 2021 | 02:36 AM
  #1  
Rob Louthan's Avatar
Rob Louthan
Thread Starter
8th Gear
 
Joined: Feb 2018
Posts: 8
Likes: 0
From: Salem Oregon
Default Headlight door motors

Just bought a 2004 and the first time I turned off the headlights they made a horrible grinding sound.
I replaced both plastic gears with brass gears and they no longer grind, BUT, when I turn the lights on and the doors open, I can hear and feel the motors still trying to run. Is there something that is supposed to tell the motors to stop when the doors are fully open or closed?
Reply
Old Nov 14, 2021 | 03:04 AM
  #2  
MrMcE's Avatar
MrMcE
Le Mans Master
 
Joined: Sep 2021
Posts: 8,342
Likes: 489
From: WI
Default

The motors run until the lids hit a physical stop and stall the motor. Headlight control module detects the stall and stops the signal.
Given that, it's possible your headlight control module is defective.
Reply
Old Nov 14, 2021 | 02:19 PM
  #3  
Rob Louthan's Avatar
Rob Louthan
Thread Starter
8th Gear
 
Joined: Feb 2018
Posts: 8
Likes: 0
From: Salem Oregon
Default

Originally Posted by MrMcE
The motors run until the lids hit a physical stop and stall the motor. Headlight control module detects the stall and stops the signal.
Given that, it's possible your headlight control module is defective.
thank you! that's exactly what I was looking for. I'll check into it
Reply
Old Nov 14, 2021 | 02:36 PM
  #4  
MrMcE's Avatar
MrMcE
Le Mans Master
 
Joined: Sep 2021
Posts: 8,342
Likes: 489
From: WI
Default

Could also be that the gears are slipping so you don't hear them grinding, because if they keep spinning then the motor isn't stalling
Reply
Old Nov 14, 2021 | 02:40 PM
  #5  
Smoken1's Avatar
Smoken1
.
Supporting Lifetime Gold
10 Year Member
St. Jude 10 Year Donor
Liked
Community Favorite
 
Joined: Apr 2013
Posts: 5,026
Likes: 1,154
From: Oregon
St. Jude Donor '14-'15-'16-'17-'18-'19-'20-'21-'22-'23
Default

Are the rubber bump stops still there?
Reply
Old Nov 15, 2021 | 10:45 PM
  #6  
Ed Ramberger's Avatar
Ed Ramberger
Drifting
15 Year Member
Liked
Loved
Community Favorite
 
Joined: May 2008
Posts: 1,694
Likes: 490
From: Denver, NC
Default

Originally Posted by Smoken1
Are the rubber bump stops still there?
^^That right there
Reply
Old Nov 15, 2021 | 10:59 PM
  #7  
Rob Louthan's Avatar
Rob Louthan
Thread Starter
8th Gear
 
Joined: Feb 2018
Posts: 8
Likes: 0
From: Salem Oregon
Default

Originally Posted by MrMcE
Could also be that the gears are slipping so you don't hear them grinding, because if they keep spinning then the motor isn't stalling
nope, new brass gears, no slipping. Motors stop once lights are open but you can hear them still trying to turn.
Reply
Old Nov 15, 2021 | 11:18 PM
  #8  
Rob Louthan's Avatar
Rob Louthan
Thread Starter
8th Gear
 
Joined: Feb 2018
Posts: 8
Likes: 0
From: Salem Oregon
Default

Originally Posted by Smoken1
Are the rubber bump stops still there?
yeah, they're all there
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

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

 Michael S. Palmer
story-1

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

 Joe Kucinski
story-2

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

 Joe Kucinski
story-3

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

 Verdad Gallardo
story-4

Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

 Joe Kucinski
story-5

Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

 Verdad Gallardo
story-6

Top 10 Corvettes Coming to Mecum Indy 2026!

 Brett Foote
story-7

Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

 Michael S. Palmer
story-8

10 Revolutionary 'Corvette Firsts' Most People Don't Know

 Joe Kucinski
story-9

5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

 Michael S. Palmer
Old Nov 15, 2021 | 11:25 PM
  #9  
Ed Ramberger's Avatar
Ed Ramberger
Drifting
15 Year Member
Liked
Loved
Community Favorite
 
Joined: May 2008
Posts: 1,694
Likes: 490
From: Denver, NC
Default

Originally Posted by Rob Louthan
yeah, they're all there
If sure all are there - look for them being notched from years of stopping. If notched they can be flipped around.

How long do they attempt to run for?
Reply
Old Nov 16, 2021 | 07:56 AM
  #10  
jdmvette's Avatar
jdmvette
Night Owl for life
Supporting Lifetime
20 Year Member
All Eyes On Me
Shutterbug
Top Answer: 5
 
Joined: Nov 2003
Posts: 24,721
Likes: 4,557
From: Bugs Bunny should'a made a left turn here
Default

If all else fails, just get a pair of new motors for $55 each

Amazon Amazon

I've done the brass gear thing in the past but the motors themselves seem to get rough over time. When I popped in brand new motors the difference in sound and smoothness of the actuation was noticable.
Reply

Get notified of new replies

To Headlight door motors





All times are GMT -4. The time now is 06:54 PM.

story-0
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-1
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-2
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-3
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-4
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-5
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-6
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-7
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-8
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-9
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