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A question for C4C5

OcalaGuy

Active member
Joined
Aug 17, 2001
Messages
32
Location
Ocala, Florida
Corvette
1996 Black Convertible
Good Sunday Morning,

I have a '96 with the electronic climate control.

The system works great but there is no button lighting. The little green lights over the buttons works as does the temp screen.

I took the head unit out, took it apart and checked the four bulbs and cleaned the contacts on the pc board. I ran a test lead with 12 volts to the runs on the pc board for the bulbs and they lit up. I put it back together and the buttons are still dark. I checked all of the fuses in the panel on the passenger side of the car.

Can you tell me where the power comes from for the bulb lighting?

Thank you and I really enjoy reading your posts.

Jim
 

c4c5specialist

Technical Advisor
Joined
May 29, 2001
Messages
3,682
Location
New Haven, Ct. USA
Corvette
Nope, but someday.
Central control module

Hi there,
Well, your lighting for your entire dash board is actually controlled by the central control module. You see, it will take the outside light, via the sun load sensor, at the defroster duct, and see what kind of light you have. Then, it will add electrical power to the lighting systems within the dashboard.
Please, if I may, a few questions, do you see any other lights out, like the radio, the control panel for your fuel, instrument panel??/
Have you noticed any lighting issues other than this, like flickering of the lights inside the car???
We are really not concerned with the exterior lights, just the interior.
Also, do you see a 'SYS' flashing in your LCD display??
Please let us know what you have, and we can proceed with diagnosis.
Besttoyou, c4c5:hb
 

OcalaGuy

Active member
Joined
Aug 17, 2001
Messages
32
Location
Ocala, Florida
Corvette
1996 Black Convertible
OK... I had to wait until it got a little dark out.

All the interior lights are working. I replace every burnt or missing bulbs when I got the car. The dash and instrument cluster all work. The dimmer switch works. I put my fat thumb on the photo electric cell and the lights dimmed.

The dash lights have never flickered. They are as steady as a rock.

I don't know if the fuel info, eng/mt, gauges, reset buttons light or not but they are dark.

The sys light flashed on and off awhile back but I replaced the battery and has never come back on.

One thing I didn't mention was that there is an after market radio in the car. It lights up like the Goodyear blimp.

I hope this helps you.


As you say...... :hb

Thank you,
Jim
 

vigman

Motor head!!!!
Joined
Feb 13, 2001
Messages
3,471
Location
Valencia, CA,USA
Corvette
88 Convert ( SOLD ) /1973 coupe 4 speed/1964 Vert!
More info

Do you have sport seats?

Mike
 

c4c5specialist

Technical Advisor
Joined
May 29, 2001
Messages
3,682
Location
New Haven, Ct. USA
Corvette
Nope, but someday.
Hi there,
YOur next move will be to check your CLSTR fuse, located in the side panel. I know you checked it, however, this is always first.
Then, when you remove the control head, check the 12volt supply on the grey wire, no tracer.
Let us know what you have, c4c5:hb
 

vigman

Motor head!!!!
Joined
Feb 13, 2001
Messages
3,471
Location
Valencia, CA,USA
Corvette
88 Convert ( SOLD ) /1973 coupe 4 speed/1964 Vert!
Read the post temp up.....

Check the HVAC controls ( using my prescribed procedure) see if you have any error codes in there.

2nd when the aftermarket stereo was installed the could have goofed the lighting crkt for the AC.

I'll have to dig a bit for this one.

Mike
 

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