Electronic AC control

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Jul 20, 2004 | 11:53 AM

Duf

Thread Starter

Instructor

Joined: Mar 2004

Posts: 138

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From: Naples FL

Electronic AC control

The electronic AC control of my 88 coupe is a bit flaky. Out of the blue the LED's will scramble, flash, sort of look like the predators arm thing when it counts down before he blows up.

Sometimes I simply hit the off button and it will reset it and all will be fine again for awhile. It controls the AC ok, it just looks like it is possessed doing it half the time.

Any easy fixes?

Jul 20, 2004 | 02:30 PM

ZylaRace

Drifting

Joined: Mar 1999

Posts: 1,931

Likes: 1

From: Norcross GA

Many things can cause this. Try removing the head unit and cleaning the connector contacts. Could also check to make sure the power and ground connections are good.

Jul 20, 2004 | 03:33 PM

Duf

Thread Starter

Instructor

Joined: Mar 2004

Posts: 138

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From: Naples FL

Hmmm unrelated but I wonder why my sig no longer displays since the board upgrade??????????

Jul 20, 2004 | 05:15 PM

skidmark

Instructor

Joined: Sep 1999

Posts: 197

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From: Ridgefield CT

Go to C4 tech tips under other. There are 2 tips listed there. Cleaning with an eraser worked for me.

Jul 20, 2004 | 09:04 PM

TALMADGE

Racer

Joined: Jun 2002

Posts: 278

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From: Perry Ga

Quote:

Originally Posted by skidmark

Go to C4 tech tips under other. There are 2 tips listed there. Cleaning with an eraser worked for me.

Jul 20, 2004 | 09:55 PM

stick91

Advanced

Joined: Jan 2004

Posts: 96

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From: Yardley PA

I was going to try this tech article, but I went down the lazy route and picked up a 100% working unit on Ebay real cheap.

http://batee.com/corvette/acrepair/c...oard/c68.shtml

Jul 20, 2004 | 11:50 PM

jfb

Team Owner

Joined: Mar 2001

Posts: 54,124

Likes: 30

From: Cincinnati, Oh USA

You have symptoms of a broken solder joint on the circuit board. If you know how to find and repair solder joints on printed circuit boards then you need to remove the control, take it apart and look for a cracked solder joint/joints and re-solder the offender/s.

Jul 21, 2004 | 09:45 AM

rick lambert

Le Mans Master

Joined: Oct 2003

Posts: 6,130

Likes: 2

From: seattle WA

Mine did the same thing-worked fine for awhile, then went crazy, everything was scrambled-but everything was working AC,Heat, Fan speed-just garbled. Pulled the unit-which is sealed on an 87-cleaned the contact pins good, reinstalled and been working perfect ever since.
Thanks to one of the forum members who suggested this.