C3 General General C3 Corvette Discussion not covered in Tech
Sponsored by:
Sponsored by:

Headlights fail

Old Oct 8, 2020 | 07:26 PM
  #21  
shaark92's Avatar
shaark92
Thread Starter
Racer
Liked
Loved
Community Favorite
Top Answer: 1
 
Joined: Aug 2018
Posts: 380
Likes: 170
From: Erath County Texas
Default

THanks, y'all ... gonna order the Dapper (Dan) relay harness ... will prob be back with "what did I do?" questions.

With our goofball "fall back" it's gonna be dark by 1800 for crying out loud. The evening cruise is gonna need illumination.

Will report back. Thanks again!
Reply
Old Oct 22, 2020 | 10:48 AM
  #22  
shaark92's Avatar
shaark92
Thread Starter
Racer
Liked
Loved
Community Favorite
Top Answer: 1
 
Joined: Aug 2018
Posts: 380
Likes: 170
From: Erath County Texas
Default

OK .... I was delayed after receipt of the dapper harness.

If I understand correctly ... there's a plug to disconnect and bypass the original leads from the switch ... appears I have to finish the relay harness with proper placement of the tab connectors. red/yellow/black ... the black is easy that's the ground. red and yellow from the relays to the low beams, and yellow only to the high beams.

I just need to translate that into what's on the car. yellow relay harness to the green factory ... and red relay harness to the brown factory?

I have yet looked, but this connection is made somewhere downrange of the switch in the panel?

... oh and closed loop connectors on red and black for the "big power"

I was actually considering a lead direct to the battery and also connect a trickle charger connector placed near the ram air inlet below the headlights for "easy" access, but no dangles!

Last edited by shaark92; Oct 22, 2020 at 10:51 AM.
Reply
Old Oct 22, 2020 | 11:03 AM
  #23  
Richard454's Avatar
Richard454
Le Mans Master
20 Year Member
Active Streak: 30 Days
Top Answer: 1
Top Answer: 3
 
Joined: May 2003
Posts: 8,877
Likes: 3,556
From: Fernandina Beach FL
2023 Restomod of the Year finalist
2020 C3 of the Year Winner - Modified
Default

Here's the back of the factory GM plug- correct colors-



Reply
Old Oct 22, 2020 | 01:04 PM
  #24  
shaark92's Avatar
shaark92
Thread Starter
Racer
Liked
Loved
Community Favorite
Top Answer: 1
 
Joined: Aug 2018
Posts: 380
Likes: 170
From: Erath County Texas
Default

@Richard454
thanks ... where I'm stumped is where to connect the relay harness to the headlight switch. The rest of it is fairly easy to determine. Especially with the diagram you posted above ... 3 wire/2 wire connections to headlights ... and which color is high beam/low beam.

this has the brown and green leads per the diagram above, but I can't identify this thing. a single and a double connector, though, so even if it's from the headlight switch and are the two I need to connect to the relay side of the relay harness, that will require splicing (which I can do, but clearly I need to verify the correct wires.)




do these tabs directly replace the factory plug at the firewall. I see it listed in the assembly manual, but I have yet to lay eyes on it.


here are the "big power" leads. positive and ground. can the positive be connected to the battery lead on the back of the alternator?
Reply
Old Oct 22, 2020 | 01:56 PM
  #25  
Richard454's Avatar
Richard454
Le Mans Master
20 Year Member
Active Streak: 30 Days
Top Answer: 1
Top Answer: 3
 
Joined: May 2003
Posts: 8,877
Likes: 3,556
From: Fernandina Beach FL
2023 Restomod of the Year finalist
2020 C3 of the Year Winner - Modified
Default

Here's a good pic-

You will use the factory harness at the headlight(low beam) where it plugs into the low beam-


The male plug from your new relay harness will simply plug in there.

For power - either the back of the alternator- or at the horn relay terminal- then a good ground- case of the alternator will work.




Reply
Old Oct 22, 2020 | 06:49 PM
  #26  
shaark92's Avatar
shaark92
Thread Starter
Racer
Liked
Loved
Community Favorite
Top Answer: 1
 
Joined: Aug 2018
Posts: 380
Likes: 170
From: Erath County Texas
Default

Welp ... got 'r dun!

MANY MANY thanks for the great advise and info. That really wasn't too big of a job. I wish, though, the harness would have had a longer lead to the headlight socket. rolling/stowing in the air scoop was a bigger challenge than in the engine compartment would have been. I even took the opportunity to run a trickle charge lead to the air scoop. Now I don't need to crack the door open anymore.

and counting. Never tripped.
Reply


Thread Tools
Search this Thread

All times are GMT -4. The time now is 08:51 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