"90" Convertible with puzzling issue?

Reply Subscribe

Thread Tools

Search this Thread

Jul 25, 2012 | 08:08 PM

hennessey33

Thread Starter

2nd Gear

Joined: Jul 2012

Posts: 2

Likes: 0

"90" Convertible with puzzling issue?

Hey Guys...Love this site...Enjoy going through the threads and reading for what ails ya! Anyway...I have one I am hoping an avid mind can help me with. This is what I am experiencing...My digital portion of my dash blinks out when the interior is hot. The amber backlight stays lit but the speedo and fuel bars go out. Now get this...When I turn on the A/C and things cool off...The digi readout slowly comes back up after the interior cools! There is a heavy clackety clack as it slowly comes back to life from the passenger side where the relays are at. Now mind you as this happens the "sys" is also in the digi readout but when it seems to cool down on the interior of the vehicle it goes back to totally normal operation. If I cut off the A/C on a warm day then as the interior/dash warms up to the outside temperature the clackety clack starts slowly and the digi readout starts to blink out as well as the interior lights start to do a light show by blinking on and off in conjunction with the clacking! I have tried replacing the relays and such but get the same thing....Any Ideas???? Thanx

Aug 19, 2012 | 06:55 PM

hennessey33

Thread Starter

2nd Gear

Joined: Jul 2012

Posts: 2

Likes: 0

Wuz Up? No Ideas from anyone???

Aug 19, 2012 | 07:10 PM

mrmtrtrnd

Race Director

Joined: Sep 2008

Posts: 10,777

Likes: 5

From: Wichita Ks

I guess the other guys are like me, not a clue.

Aug 19, 2012 | 07:18 PM

Churchkey

Melting Slicks

Joined: Sep 2008

Posts: 2,376

Likes: 111

From: Cherokee National Forest TN

Actually, never heard of you particular issue.

Rule of thumb: Whenever something strange is occuring with the electrical system check all grounds. Adding new or extra grounds may also help.

GL

BTW: Cleaning the plug in E connector contacts @ the dash cluster may help. Lowering the steering column = easy cluster removal.

Last edited by Churchkey; Aug 19, 2012 at 07:24 PM. Reason: add info

Aug 20, 2012 | 12:23 AM

corvetteronw

Race Director

Joined: Feb 2003

Posts: 16,475

Likes: 270

From: Kingman AZ

Cruise-In VII Veteran

Cruise-In VIII

St. Jude Donor '06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16

Probably a poor ground as discussed above.
Try this site. If no luck then there are places that can reapir it.
http://www.corvetteactioncenter.com/...0/008/article/

Aug 20, 2012 | 12:35 AM

johnnymo63

Le Mans Master

Joined: Nov 2006

Posts: 5,032

Likes: 204

From: Greenwood Indiana

2021 C4 of the Year - Modified Finalist

C4 of Year Finalist (appearance mods) 2019

An SYS alert usually means battery problems. You ought to get it checked and clean the battery terminals, too.

Aug 20, 2012 | 11:53 PM

Klondike

Team Owner

Joined: Feb 2006

Posts: 23,237

Likes: 117

From: San Antonio Texas

I had similar problems that turned out to be the ground terminal on the battery. Cleaned off the black crust on the post and evrything came back to life. A smear of grease on the posts seems to keep it clean.

Aug 21, 2012 | 06:56 AM

XR_Strider_GuY

Racer

Joined: Mar 2011

Posts: 304

Likes: 0

From: Victoria Australia

OK you need a work shop manual to workout the circuit of how the fuel bar and speedo connects.

With the clicking of the relays it sounds like you have a miss connection somewhere. There is a chance the plug of the instrument cluster is loose and only shows the issue when its hot.

A sys warning means a code has been triggered. You need to ground the ALDL plug to pull the codes. My thinking is that since the sys light triggers when your dash goes south in the heat, you would be able to find out what is faulty or what circuit to enable you to start checking.