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

1987 Electrical Gremlin

Thread Tools
 
Search this Thread
 
Old May 18, 2011 | 06:23 PM
  #1  
Seattle C4's Avatar
Seattle C4
Thread Starter
Racer
 
Joined: Apr 2008
Posts: 447
Likes: 0
From: Woodinville WA
Default 1987 Electrical Gremlin

Pulled the 87 out of storage to get it emission tested and tabs for the year. Ran fine down to the test center after a couple of restarts of the vehicle driving back home the temp gauge for the climate controls starts flashing madly. Hit the brake pedal to stop at a light and the dash goes almost completely out the door locks unlock and lock the dash lights come back up but the car does not stall.

This happened maybe 10 time on the way back.

Any thoughts or suggestions?
Reply
Old May 18, 2011 | 07:36 PM
  #2  
HlhnEast's Avatar
HlhnEast
Safety Car
 
Joined: Nov 2008
Posts: 4,328
Likes: 15
From: Jacksonville FL
Default

Dash lights are tied to the TAIL circuit thru the headlight switch. The PDLS are thru the COURTESY circuit. Dunno why they both are going crazy. Flashing climate control I think is telling you it has a problem and I think is on another circuit. Dunno what they all have in common except maybe a ground.

Check to see if its throwing any codes. Maybe it will tell ya something. Hopefully someone with a lot more knowledge will chime in.

Calling jfb!!

Good Luck!
Reply
Old May 18, 2011 | 10:09 PM
  #3  
JackDidley's Avatar
JackDidley
Race Director
20 Year Member
Active Streak: 30 Days
Liked
Loved
 
Joined: Sep 2003
Posts: 16,838
Likes: 341
From: Database Error Indiana
Default

Bad connection from corrosion, one or both battery cables is my guess. I'd clean both end of both cables.
Reply
Old May 19, 2011 | 09:54 PM
  #4  
jfb's Avatar
jfb
Team Owner
20 Year Member
 
Joined: Mar 2001
Posts: 54,124
Likes: 30
From: Cincinnati, Oh USA
Default

Check G201, a ground for all the devices and more that you found misbehaving. This is near the LH side of the steering column behind the instrument panel. Look for corrosion, loose nut, etc.
There are two wires on G201, one goes to the a/c heater controller and the other goes to a large splice in the wiring (S213) where 27 electrical device ground wires come together. If G201 is ok, then you will have to trace grounds to S213 when the dash and other things fail.
You can only trace problems when they are acting up.
Reply
Old May 20, 2011 | 01:00 PM
  #5  
Seattle C4's Avatar
Seattle C4
Thread Starter
Racer
 
Joined: Apr 2008
Posts: 447
Likes: 0
From: Woodinville WA
Default

Thanks for all the excellent suggestions but I caved and just dropped the car off at the Vette shop. I surrender....

Reply
Old May 20, 2011 | 02:54 PM
  #6  
pmihaltian's Avatar
pmihaltian
Slingshot
Supporting Lifetime
20 Year Member
 
Joined: Dec 2001
Posts: 3,817
Likes: 24
From: Charlotte NC
Default

Originally Posted by Seattle C4
Thanks for all the excellent suggestions but I caved and just dropped the car off at the Vette shop. I surrender....

Let us know the outcome.
Reply
Old May 20, 2011 | 03:21 PM
  #7  
AGENT 86's Avatar
AGENT 86
Team Owner
20 Year Member
Active Streak: 30 Days
Active Streak: 60 Days
Active Streak: 90 Days
 
Joined: Jan 2003
Posts: 20,322
Likes: 248
From: Summerland B.C. Canada
Default

Originally Posted by JackDidley
Bad connection from corrosion, one or both battery cables is my guess. I'd clean both end of both cables.
Or loose
Reply
Old May 22, 2011 | 11:54 PM
  #8  
Seattle C4's Avatar
Seattle C4
Thread Starter
Racer
 
Joined: Apr 2008
Posts: 447
Likes: 0
From: Woodinville WA
Default

I am awaiting the diagnostic soon. Thanks for all the great feedback though. Why is it whenever you leave your car at the shop you have flashes of Ferris Bueller??
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

10 Ugly Corvettes That We Still Kinda Love

 Joe Kucinski
story-1

Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

 Brett Foote
story-2

10 Things Every Corvette Owner Needs (2026 Edition)

 Michael S. Palmer
story-3

8 Most "Only Corvette Owners Understand" Quirks and Problems

 Pouria Savadkouei
story-4

10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

 Joe Kucinski
story-5

How Much Horsepower Every Corvette Engine "LOST" in 1972

 Joe Kucinski
story-6

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

 Michael S. Palmer
story-7

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

 Joe Kucinski
story-8

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

 Joe Kucinski
story-9

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

 Verdad Gallardo
Old May 23, 2011 | 06:09 PM
  #9  
HlhnEast's Avatar
HlhnEast
Safety Car
 
Joined: Nov 2008
Posts: 4,328
Likes: 15
From: Jacksonville FL
Default

Originally Posted by jfb
Check G201, a ground for all the devices and more that you found misbehaving. This is near the LH side of the steering column behind the instrument panel. Look for corrosion, loose nut, etc.
There are two wires on G201, one goes to the a/c heater controller and the other goes to a large splice in the wiring (S213) where 27 electrical device ground wires come together. If G201 is ok, then you will have to trace grounds to S213 when the dash and other things fail.
You can only trace problems when they are acting up.
Well there ya go!
Reply
Old Jun 21, 2011 | 09:45 PM
  #10  
Seattle C4's Avatar
Seattle C4
Thread Starter
Racer
 
Joined: Apr 2008
Posts: 447
Likes: 0
From: Woodinville WA
Default

Update: Car went in no electrical issues found outside of moisture and that is not shocking. Proceeded with this years upgrades: New fuel pump, new intake gaskets, new fuel injectors Flow Matched of course Bosch. Full tune up with all the goodies. Everything checked out front to back and it's running like a champ.

One tiny issue to work out. After car is up to temp and driving around town made a stop at the store for maybe 15 min. came back headed out got stuck at a light and after about a minute or so of sitting at the light she just stalled. Started right back up but stalled none the less. Idle is around 600 RPM at idle after the tune up when hot. Car was fine after and never did it again until the next day same scenario. Has done it about a half dozen times since the first time and after a re start she is fine.

Thoughts, suggestions?

Almost there but not quite....
Reply

Get notified of new replies

To 1987 Electrical Gremlin





All times are GMT -4. The time now is 01:24 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