Anyone have any thoughts on this? I took it in for front allignment today and when the mechanic looked at me and said "I have no idea why they're staying on" I got a little worried. Local Chevy dealer BTW. Here's what's going on with all little tidbits I can think of. appreciate any feedback.
-interior lights all stay on for 10-15 minutes after last door closes.
-doesnt matter which door
-no door ajar signal while they're on
-go out with ccm2 fuse pulled.(along with whole dash)
-rear deck switch in driver's door doesnt work
-rear glass is missing a rubber bumper on the left side of latch. a little play but not alot.
-door ajar signals work when switch is pushed in manually on door.

when it's on during the day it's not so bad until it turns off but it's really annoying at night to have all the interior lights on for 10 minutes or more.

again, any help or ideas would be appreciated.

 

The actual time the courtesy lights stay on is programmed into the CCM. Usually 20 seconds.

In order for the driver side door hatch switch to work, the driver side Door Ajar Switch contacts must close when the Door is opened. Since you say the Door Ajar light and the courtesy lights do come on when the driver side door is opened and I'm assuming the Hatch release switch in the console works, either the Hatch Door Switch plug is disconnected or the switch is bad.

Here's a test to eliminate a stickey courtesy lamp relay contact.

On the Diag. connector located above the driverside right knee. With a piece of wire, short pin 4 to pin 12.
Turn the ignition to run (don't start the engine).

[01|02|03|04|05|06|07|08|
[09|10|11|12|13|14|15|16|

Look at the Speedometer LCD and watch it display any trouble codes.

After the codes are displayed you should see 1.0
Keep pressing the TRIP/ODO button until 1.4 is displayed.

The press the ENG/MET button until 10 is displayed.
If you pass 10 and need to go backwards, press the FUEL INFO button.

The CCM will turn on the Courtesy Lamp Relay on and off every 3 seconds. So you should see the interior lights cycle on and off every 3 seconds.

If they do operate properly, Id say something in the timing circuitry inside the CCM is defective keeping the lights on for 10 to 15 minutes.

If the lights don't cycle, but stay on and you don't hear the relay clicking, I'd say the secondary contacts in the relay may be sticking.

When the lights are on you should see a 1 in the last digit of the odometer. When the lights are off you should see a 0 in the last digit of the odometer.

 

Very cool.
the lights cycle on and off every 3 seconds like you said they should if they're working properly. The codes that flash are c12 and h72. I havent looked them up yet. Is the timing circuitry able to be worked on?

The hatch door switch does not work. I dont know if its bad or disconnected. Could that be problem?

Can you tell I'm a parts replacer and not a diagnostic type yet?

 

C12 just indicates the diags. are running.
H72 indicates LCD dimming circuit open or shorted to ground. I wouldn't worry about that code. I've seen that code set when nothing is really wrong. It's a test done on power up of the CCM. CCM code 72 can also set if you have an after market radio installed.

It appears the timer circuit inside the CCM is bad.

When every a CCM is replaced with a factory rebuilt one, one of the parameters entered by using a Tech 1A or equivalent tester is to enter the mileage of the car and the courtesy light timer delay.

So the only thing I can think of is some thing inside the CCM is bad. You only have 100 miles to program a factory rebuilt CCM. After that as far as I know, no parameters can be changed.

My guess is the CCM needs to be replaced or if you don't want to spend the money, you could wire around the CCM so that when the doors are open, the interior lights will come on and will immediatley go off when the doors are closed.

To clear the H72 and see if it comes back, short Pin 4 or 5 to Pin 12. Turn the ignition to run. Let the display cycle. When it stops at 1.0, press TRIP/ODO until you see 1.7. Press ENG/MET and hold until -----
appears. Turn ignition off. Then turn ignition on and let the display cycle. H72 should be gone.

As far as the hatch release switch, you may want to remove the door panel and make sure the switch is plugged in.

If you want to disable the courtesy lights until you can figure out what the problem is, remove the RH CTSY 5 amp fuse on the passenger side of the instrument panel. This will disable the footwell, door lights, console glove box and Lighted rear view mirror. To disable the cargo lamps, just remove the bulbs.

 

Thanks for the info!
I'm hoping to not have to wire around anything as a fix the little glitches with my new toy but I have feeling a new CCM isnt cheap. Investment vs reward right now. All new tires coming today so CCM will have to wait. I'll double check with local chevy again and see what they say about re-programming the timing, Y or N? and go from there.

Thanks again. This site is great for a new owner like me to dig info up!

 

The CCM also called the Body Control Module (BCM)
lists for $196.00 with a $67.50 core charge.

You should be able to purchase it from most dealers for $135.06 with a $67.00 core charge.

Part # 88999217 BCM for 94 Corvette.

If you do replace the BCM I'd recommend you remove all of the brackets so the old BCM can be easily pulled out. Then drive to the Dealer for programming.

That can save you the labor cost of them replacing the BCM and they can also look at any of the parameters of the old BCM before installing/programming the new one.