ccm question
Team Owner
Joined: Aug 2000
Posts: 40,156
Likes: 45
From: San Pedro CA
that's odd. I donno what to say about that, but I would focus on the light switch, not the CCM.
The CCM doesn't control lighting.
Do you have the Helm Factory Service manual, www.helminc.com, for your car? I would start debugging from there.
I have never heard of this problem.
Is your car possibly Canadian?
The CCM doesn't control lighting.
Do you have the Helm Factory Service manual, www.helminc.com, for your car? I would start debugging from there.
I have never heard of this problem.
Is your car possibly Canadian?
Safety Car
Joined: May 1999
Posts: 3,651
Likes: 5
From: Atlantis
Cruise-In I Veteran
I have a '91.......
My digital instrument lights come ON with the key.
Day or night, when the key is turned ON, the instrumment lights turn ON.
IF the interior lights HAVEN'T timed out, switching the KEY ON will cancel the delay timer in the CCM and turn the interior lights OFF.
That's so you will be able to see clearly outside when it's dark.
It's difficult to see out of the vehicle when it's dark with the interior lights on.
So.... there is an input on the CCM for the ignition 'ON' line that will immediately turn OFF the interior lights that are being held on by the 'Courtesy Light' buss line.
I belive that's the way it was designed to work and mine works exactly that way.
My digital instrument lights come ON with the key.
Day or night, when the key is turned ON, the instrumment lights turn ON.
IF the interior lights HAVEN'T timed out, switching the KEY ON will cancel the delay timer in the CCM and turn the interior lights OFF.
That's so you will be able to see clearly outside when it's dark.
It's difficult to see out of the vehicle when it's dark with the interior lights on.
So.... there is an input on the CCM for the ignition 'ON' line that will immediately turn OFF the interior lights that are being held on by the 'Courtesy Light' buss line.
I belive that's the way it was designed to work and mine works exactly that way.
Thread Starter
Instructor
Joined: Jan 2005
Posts: 145
Likes: 0
From: Ft.Worth Texas
No not canadian,I don't have a helms but I have a mitchells computer program.It tells me that all instrument lighting is controled by the ccm.I'm begining to think ther is short somewhere between the ccm and ic,just have to wring it out I guess.
Thanks
Randall
Thanks
Randall
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski