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:

Hazard light hyper-flash

Thread Tools
 
Search this Thread
 
Old Oct 20, 2015 | 08:01 PM
  #1  
jakecol's Avatar
jakecol
Thread Starter
Racer
10 Year Member
All Eyes On Me
Liked
 
Joined: May 2013
Posts: 371
Likes: 20
From: Ft. Collins Colorado
Default Hazard light hyper-flash

98 hatchback. Converted front and rear to LED's and installed harness(from a reputable) supplier. All signal lights work great. HOWEVER when I enact the Hazard (4 ways) all 4 corners go into hyper-flash. Contacted the supplier and the answer I got was "Must be the hazard switch is bad".
Being more mechanical than electrical, I really would appreciate any and all expertise with this problem.
Thanks to all.
Reply
Old Oct 20, 2015 | 10:44 PM
  #2  
lionelhutz's Avatar
lionelhutz
Race Director
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Apr 2007
Posts: 11,150
Likes: 890
From: South Western Ontario
Default

The flasher in the hazard switch is still in play during hazard use and it doesn't like the reduced load which causes the hyperflash. There is no easy fix so I suggest you just live with it.
Reply
Old Oct 20, 2015 | 10:52 PM
  #3  
73Corvette's Avatar
73Corvette
Le Mans Master
 
Joined: Feb 2012
Posts: 6,644
Likes: 478
From: OK
Default

Hyper flash with Hazards might be a GOOD thing
Reply
Old Oct 21, 2015 | 06:34 AM
  #4  
dadaroo's Avatar
dadaroo
Le Mans Master
 
Joined: Mar 2011
Posts: 6,835
Likes: 301
From: Columbia SC
Default

Originally Posted by jakecol
98 hatchback. Converted front and rear to LED's and installed harness(from a reputable) supplier. All signal lights work great. HOWEVER when I enact the Hazard (4 ways) all 4 corners go into hyper-flash. Contacted the supplier and the answer I got was "Must be the hazard switch is bad".
Being more mechanical than electrical, I really would appreciate any and all expertise with this problem.
Thanks to all.
Your "reputable" supplier may be so but he has no idea what he is talking about.

Like Lionelhutz said a Hyperflash harness only works to prevent fast flashing for the turn signals. You would have to add resistance in the circuit feeding the Hazards. That would be the Orange wire from Fuse 8 in this schematic. Would need to install it after the spice and just in the wire going to the Hazard switch.






Mr. Sam
Reply
Old Oct 21, 2015 | 07:12 AM
  #5  
dadaroo's Avatar
dadaroo
Le Mans Master
 
Joined: Mar 2011
Posts: 6,835
Likes: 301
From: Columbia SC
Default

PS: If you had installed the LEDs with resistors at each bulb you would not need a Hyperflash harness and the Hazards would work normally.
Reply
Old Oct 21, 2015 | 09:37 AM
  #6  
jakecol's Avatar
jakecol
Thread Starter
Racer
10 Year Member
All Eyes On Me
Liked
 
Joined: May 2013
Posts: 371
Likes: 20
From: Ft. Collins Colorado
Default

Hey guys. Thanks for the info. 73Corvette has a good point.
Reply
Old Oct 21, 2015 | 10:05 AM
  #7  
lionelhutz's Avatar
lionelhutz
Race Director
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Apr 2007
Posts: 11,150
Likes: 890
From: South Western Ontario
Default

Originally Posted by dadaroo
Your "reputable" supplier may be so but he has no idea what he is talking about.

Like Lionelhutz said a Hyperflash harness only works to prevent fast flashing for the turn signals. You would have to add resistance in the circuit feeding the Hazards. That would be the Orange wire from Fuse 8 in this schematic. Would need to install it after the spice and just in the wire going to the Hazard switch.


Mr. Sam
Won't work. The load has to be on the output of the flasher circuit, not the input. And any load connected to one of the 5 output wires is also in circuit during normal operation.

Load resistors SUCK. The get hot and melt stuff and have to be hacked into the wiring. Most people do a poor job installing them and the connection ends up being a weak spot in the harness prone to future failure. It's not helped by the suppliers providing those crappy quick install T splices with the resistors.
Reply
Old Oct 21, 2015 | 02:33 PM
  #8  
dadaroo's Avatar
dadaroo
Le Mans Master
 
Joined: Mar 2011
Posts: 6,835
Likes: 301
From: Columbia SC
Default

Yeah, I was stupid trying to respond before rushing out to my client.


Mr. Sam
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

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

 Michael S. Palmer
story-1

2027 Corvette vs The World: Every Model vs Closest Competitor

 Joe Kucinski
story-2

10 Most Common Corvette Problems of the Last 20 Years!

 Joe Kucinski
story-3

5 MOST and 5 LEAST Popular Corvette Model Years in History!

 Joe Kucinski
story-4

2027 Corvette Buyer's Guide: Everything You Need to Know!

 Joe Kucinski
story-5

10 Things C8 Corvette Owners Hate (But Won't Tell You)

 Joe Kucinski
story-6

10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!

 Brett Foote
story-7

Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)

 Joe Kucinski
story-8

Grand Sport & Grand Sport X Launch Alongside All-New 535hp LS6 V8!

 Michael S. Palmer
story-9

5 Reasons Bad Drivers Crash & 5 Ways to Avoid a Costly Mistake!

 Joe Kucinski
Old Oct 22, 2015 | 11:35 PM
  #9  
Sam Handwich's Avatar
Sam Handwich
Burning Brakes
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Nov 2011
Posts: 1,037
Likes: 120
Default

Originally Posted by jakecol
Hey guys. Thanks for the info. 73Corvette has a good point.
Actually, i made my own hyper-flash bypass harness. Only saved me a few dollars, but I wanted to see if I could do it. When I bought my LEDs I wanted to eliminate that overheating issue and left out the resistors.

It worked and solved the hyper-flash. Or you could buy one of the harnesses some of the vendors sell.
Reply

Get notified of new replies

To Hazard light hyper-flash





All times are GMT -4. The time now is 07:51 AM.

story-0
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-1
2027 Corvette vs The World: Every Model vs Closest Competitor

Slideshow: 2027 Corvette lineup vs the world.

By Joe Kucinski | 2026-04-20 17:58:41


VIEW MORE
story-2
10 Most Common Corvette Problems of the Last 20 Years!

Slideshow: 10 major Corvette problems from the last 20 years.

By Joe Kucinski | 2026-04-14 16:37:05


VIEW MORE
story-3
5 MOST and 5 LEAST Popular Corvette Model Years in History!

Slideshow: 5 most and least popular Corvette model years.

By Joe Kucinski | 2026-04-08 13:25:01


VIEW MORE
story-4
2027 Corvette Buyer's Guide: Everything You Need to Know!

Slideshow: 2027 Corvette buyer's guide

By Joe Kucinski | 2026-04-17 16:41:08


VIEW MORE
story-5
10 Things C8 Corvette Owners Hate (But Won't Tell You)

Slideshow: 10 things C8 Corvette owners hate, but won't tell you.

By Joe Kucinski | 2026-04-01 18:36:07


VIEW MORE
story-6
10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!

Slideshow: Should you add one of these incredible Corvettes to your garage?

By Brett Foote | 2026-04-01 18:14:05


VIEW MORE
story-7
Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)

Slideshow: Every Corvette Grand Sport explained

By Joe Kucinski | 2026-03-26 07:13:44


VIEW MORE
story-8
Grand Sport & Grand Sport X Launch Alongside All-New 535hp LS6 V8!

Slideshow: Breaking down the 2027 Grand Sport, Grand Sport X, Stingray, and LS6 V8.

By Michael S. Palmer | 2026-03-26 13:48:45


VIEW MORE
story-9
5 Reasons Bad Drivers Crash & 5 Ways to Avoid a Costly Mistake!

Slideshow: 5 reasons bad drivers crash sports cars & 5 ways to avoid a costly shame!

By Joe Kucinski | 2026-03-25 16:32:55


VIEW MORE