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99 Suburban domelight stays on

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Zebrafive 
Member - Posts: 4
Member spacespace
Joined: June 09, 2005
Location: United States
Posted: January 18, 2006 at 12:49 PM / IP Logged  

The domelight will not shut off on my 99 Suburban unless you start the engine, use the domelight override switch or pull the fuse.

It used to shut off after about 15 seconds. I am thinking it might be the keyless entry module. Where is it located? I want to unplug it and see if that is the problem.

The other thing may be a bad door switch. What is the best way to check them?

mike swanson 
Copper - Posts: 290
Copper spacespace
Joined: January 28, 2003
Location: United States
Posted: January 18, 2006 at 1:12 PM / IP Logged  
1st check to see,,,IM NOT SAYING YOU DUMB or anything like that. but check to see if the dome switch is on.
I think they have 2 diff switches and also it can be programed to do diff things.
This is a -trigger so somthing could be grounding the dome lite to stay on.
Has any1 worked on it? putting a remote start on or any headliner work????
brcidd 
Copper - Posts: 274
Copper spacespace
Joined: January 07, 2005
Location: Ohio, United States
Posted: January 18, 2006 at 2:43 PM / IP Logged  
I saw a 99 Tahoe do the same thing- it was the dome light supervision module- mounted dead center in the dash just above the console- it was about $96 to replace- so owner opted for a module from a bone yard- owner ran with the override switch turned on- so the lights would stay off....
Brcidd - Engineer That Does Remote Starter Installs on the side.
Zebrafive 
Member - Posts: 4
Member spacespace
Joined: June 09, 2005
Location: United States
Posted: January 19, 2006 at 11:14 AM / IP Logged  

mike swanson wrote:
1st check to see,,,IM NOT SAYING YOU DUMB or anything like that. but check to see if the dome switch is on.
I think they have 2 diff switches and also it can be programed to do diff things.
This is a -trigger so somthing could be grounding the dome lite to stay on.
Has any1 worked on it? putting a remote start on or any headliner work????

Domelight switch (thumbwheel to right of headlight switch) was first thing I checked. You can turn on the domelights with it, even with the domelight override button engaged.

Not aware of two switches, unless you mean the thumbwheel and domelight override buttton. Could not find anything about programing in my owners manual

There may be a door switch gone bad or wire going to ground causing this problem.

Headliner has never been worked on. No remote start. Only electrical work is a trailer brake controller.

Zebrafive 
Member - Posts: 4
Member spacespace
Joined: June 09, 2005
Location: United States
Posted: January 19, 2006 at 11:20 AM / IP Logged  

brcidd wrote:
I saw a 99 Tahoe do the same thing- it was the dome light supervision module- mounted dead center in the dash just above the console- it was about $96 to replace- so owner opted for a module from a bone yard- owner ran with the override switch turned on- so the lights would stay off....

This sounds like it may be the problem. Do you have any more info? Part #? How to ID so I can look for in the salvageyard?

Do you know if this Tahoe has keyless entry? Seems someone told me if you have keyless entry it controled the domelight delayed shut off. Thats why I was thinking the keyless entry module might be bad.

brcidd 
Copper - Posts: 274
Copper spacespace
Joined: January 07, 2005
Location: Ohio, United States
Posted: January 19, 2006 at 2:41 PM / IP Logged  
 FIGURE Interior Lamp Control Module(c)
99 Suburban domelight stays on -- posted image.
99 Suburban domelight stays on -- posted image.
(1)Remote Control Door Lock Receiver Module
(2)Interior Lamp Control Module
(3)Transfer Case Control Module
Interior Lamps System Check

Step

Action

Normal Result(s)

Abnormal Result(s)*

1

Place the courtesy lamp switch in OFF.

All of the interior lamps are off.

2

Place the courtesy lamp switch in ON.

The courtesy lamps turn on.

3

Open and close each door one at a time.

  • The courtesy lamps turn on for approximately 25 seconds.
  • The courtesy lamps fade out each time.

4

Press the unlock button on the keyless entry transmitter.

  • Courtesy lamps turn on for approximately 40 seconds.
  • Courtesy lamps fade out.

5

  1. Open the IP compartment.
  2. Close the IP compartment.

The IP compartment lamp turns on once the compartment is open, then turns off when the compartment is shut.

Instrument Panel (I/P) Compartment Lamp Inoperative

6

  1. Turn each reading switch to ON.
  2. Open each sunshade mirror cover.
  3. Close each sunshade mirror cover.
  • The reading lamps turn on.
  • The sunshade mirrors lamp turn on.
  • The sunshade mirror lamp goes out.

Vanity Mirror Lamp(s) Inoperative

7

Place the headladlamp switch in the PARK position.

  • The component illumination lamps light.
  • The ashtray lamp lights.

* Refer to the appropriate symptom diagnostic table for the applicable abnormal result.

Brcidd - Engineer That Does Remote Starter Installs on the side.
Zebrafive 
Member - Posts: 4
Member spacespace
Joined: June 09, 2005
Location: United States
Posted: January 22, 2006 at 11:08 AM / IP Logged  

Thanks for posting the drawing of the Modules. I assume they are located somewhere under the dash.

The Interior Lamps System Checks would not let me open the links to Abnormal Results. I get a message "Access Forbidden"


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