C68 Lights

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Jul 5, 2017 | 07:39 AM

cdm747

Thread Starter

Burning Brakes

Joined: Jan 2017

Posts: 961

Likes: 237

From: Diamondhead Mississippi

St. Jude Donor '17-'18-'19-'20-'21-'22

C68 Lights

I noticed last night coming home in my 88 that when I turned the headlights on the lights on my electronic (C68) climate control went off, all readouts and button lights. All the other dash lights seemed to be functioning properly. Any ideas, possibly a bad ground for the C68 system?

Jul 6, 2017 | 11:09 AM

kael

Drifting

Joined: Nov 2015

Posts: 1,682

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Finalist 2020 C4 of the Year - Unmodified

All controls still work, right? Just the LED is out? Probably a capacitor going south. Mine is out most of the time but works every once in a while.

For fix, check:
http://www.batee.com/corvette/dcrg/s..._services.html

Has service and also DIY articles with kits.

Jul 6, 2017 | 05:09 PM

cdm747

Thread Starter

Burning Brakes

Joined: Jan 2017

Posts: 961

Likes: 237

From: Diamondhead Mississippi

St. Jude Donor '17-'18-'19-'20-'21-'22

Quote:

Originally Posted by kael

I have ordered from Bryan before and may pull the unit and send to him however this only happened when i turned my headlights on. Readout works fine most of the rest of the time.

Jul 6, 2017 | 06:18 PM

HAD2HAV2

Melting Slicks

Joined: Jan 2001

Posts: 2,996

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From: MOORESVILLE NC

Another thing to think about when you turn your lights on, the display on your C68 head unit will also dim. This function comes through the radio.

Last edited by HAD2HAV2; Jul 6, 2017 at 06:19 PM.

Jul 7, 2017 | 02:51 AM

Cliff Harris

Race Director

Joined: Apr 2002

Posts: 10,036

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From: Anaheim CA

See this article for info on how the backlight dimmer works:

https://www.corvetteforum.com/forums...ull-story.html

Jul 7, 2017 | 08:27 AM

cdm747

Thread Starter

Burning Brakes

Joined: Jan 2017

Posts: 961

Likes: 237

From: Diamondhead Mississippi

St. Jude Donor '17-'18-'19-'20-'21-'22

Quote:

Originally Posted by Cliff Harris

See this article for info on how the backlight dimmer works:

https://www.corvetteforum.com/forums...ull-story.html

That was some awful heavy reading for this early in the morning even with my electrical background. It is possible the lights were on and just had dimmed to the point I could not see them. I did not try adjusting my lights with the dimmer switch. Next time I have it out at night I will see if that makes a difference.

Jul 7, 2017 | 08:31 AM

cdm747

Thread Starter

Burning Brakes

Joined: Jan 2017

Posts: 961

Likes: 237

From: Diamondhead Mississippi

St. Jude Donor '17-'18-'19-'20-'21-'22

Quote:

Originally Posted by HAD2HAV2

Another thing to think about when you turn your lights on, the display on your C68 head unit will also dim. This function comes through the radio.

That may be part of the problem. I installed an aftermarket radio and perhaps the light dimming circuit is not connected properly. The PO had removed all of the amps and original speakers and the Bose was not working so I put in a Kenwood unit.

Jul 7, 2017 | 09:54 AM

GRIS

Racer

Joined: Jul 2012

Posts: 332

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From: MUSKOGEE COUNTY OKLAHOMA

A similar problem with my '87: turn on the headlights at night and the whole dash blacked out. Replacing the HL switch did nothing, so the cluster is on it's way to Batee for rebuild.