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

1985 Corvette Headlight Question

Thread Tools
 
Search this Thread
 
Old Nov 11, 2014 | 11:13 AM
  #1  
krukker76's Avatar
krukker76
Thread Starter
Cruising
 
Joined: May 2014
Posts: 10
Likes: 0
Default 1985 Corvette Headlight Question

Any help would be greatly appreciated. So, it got very cold last winter and my one headlight would take a sec or two longer than other to go up when I turned them on. Then it started closing slower than other too. Then it didn't go up at all. I can manually crank it open. Strangley it sounds like the motor in the headlight that actually works is always going, like i can hear it constantly running, don't know if that is related or not. Anyway I was going to start trouble shooting things. I looked at the wires and there is a little box with a switch on it. What is this? There is a picture attached to this post. Is there an individual fuse for each headlight? Any thoughts going forward. The headlight that doesn't work doesn't sound like the motor is working.Thanks alot.
Attached Files
File Type: zip
Attachments_20141111 (1).zip (384.9 KB, 31 views)
Reply
Old Nov 12, 2014 | 02:56 AM
  #2  
Cliff Harris's Avatar
Cliff Harris
Race Director
15 Year Member
 
Joined: Apr 2002
Posts: 10,036
Likes: 346
From: Anaheim CA
Default

That switch might be to turn off the under hood lights when the hood is up. Pretty common modification.

The headlights are controlled by 3 relays that are mounted on the front of the driver's side wheel well. One relay controls the direction that the motor runs and the other two run the motors. You can swap the left and right relays and see if the problem moves to the opposite side.

You might have a stripped gear inside the headlight motor (very common problem). The only way to find out is to take it apart. This might be helpful:

http://forums.corvetteforum.com/c4-t...placement.html
Reply
Old Nov 12, 2014 | 05:42 AM
  #3  
65Z01's Avatar
65Z01
Team Owner
20 Year Member
 
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
Default

I can manually crank it open.
Try manually cranking the "good" HL and compare movement rate with the "bad" one. If the "bad" one is much slower, open up and replace the three bushings.

Also, open the connectors to the motors to examine/clean the electrical contacts of any corrosion.

That switch might be to turn off the under hood lights when the hood is up. Pretty common modification.

It looks like the one installed on my '88; very convenient when working under clam for any length of time with motor off.
Reply
Old Nov 12, 2014 | 04:02 PM
  #4  
Hot Rod Roy's Avatar
Hot Rod Roy
Safety Car
15 Year Member
 
Joined: Sep 2004
Posts: 3,953
Likes: 550
From: Mission Viejo CA
Default

Originally Posted by 65Z01
Try manually cranking the "good" HL and compare movement rate with the "bad" one. If the "bad" one is much slower, open up and replace the three bushings.
Sorry, 65Z01, but krukker's '85 doesn't have the three bushings you're referring to. Those are in the '88-'94 headlight motors.

Reply

Get notified of new replies

To 1985 Corvette Headlight Question





All times are GMT -4. The time now is 02:56 AM.

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