Question about 1999 Chevrolet Tahoe

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Interior dome lights not working properly. Courtesy lights do not time out when doors close and reading lights and dome lights not illuminating. The dome override switch checks out. The Park and Headlamps work properly. The Instrument Panel Dimmer switch works but does not turn on the dome lights at full setting; however, the switch checks out for connecting the dome lamps ( resistance check to wiring).

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  • Chevrolet Master
  • 693 Answers

Check the door switches and fuses for a problem.

Posted on Jul 14, 2017

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Posted on Jan 02, 2017

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SOURCE: gauge lights not working.

Solved the problem -on of the fuses in the relay box under the hood was bad - Although it is not marked well - It says park and horn????

Posted on Feb 10, 2009

lastech
  • 408 Answers

SOURCE: Instrument lights won't turn off

hi,seem lighting switch is grounded or wiring for cluster is grounded,if can remove the lighting switch disconnected the wire,see if light in cluster is off,switch or wiring must check,ty

Posted on Mar 29, 2009

mlapres
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SOURCE: 2005 Saturn Vue Fog Lights and Instrument Panel do not illuminate

Try pulling the fuse for the DRL (daytime running lights.)

Posted on Jun 19, 2009

wiringlunati
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SOURCE: instrument cluster bulb is out. how do i replace

It may not be a bulb, as the instrument cluster usually has a number of bulbs and they probably didn't all blow at once. Pulling instrument clusters can be touchy and may not be for the average "shadetree mechanic" however, typically there are a few screws above the cluster going into the dash pad and a few hidden behind the trim panels below the cluster.

Posted on Dec 22, 2009

  • 2 Answers

SOURCE: 1999 Chev Silverado Door Light Switch

the actuator for the dome light is actually located inside the lock mechanism. Have you checked to make sure the dome light override button is in the out position?

Posted on Jul 17, 2010

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I have a 2007 Buick Lucerne and the front reading lamps won't turn off.


Overhead Console Lamp and Roof Rail Courtesy/Reading Lamps
The courtesy/reading lamp is a duel purpose lamp that can be illuminated two different ways. First, the lamp can be turned ON during courtesy lamp operation as described above. Second, the lamps can be turned ON individually for reading lamp operation by the lamp switch. The BCM supplies battery voltage from the INT LAMPS fuse through the inadvertent power courtesy lamps circuit to the courtesy/reading lamps for reading lamp operation only. Ground for the courtesy lamp module or the roof/rail reading lamps is provided at G402

Courtesy Lamps
When either one of the front doors is opened, ground is applied through the door latch door open switch and the door open switch signal circuit to the door module indicting the door open position. In response to this signal, the door module sends a GMLAN serial data message to the BCM of the door open position. Or, when either one of the rear doors is opened, ground is applied through the door latch door open switch and the rear door open switch signal circuit to the BCM is indicating the rear door open position. Once a door open message or signal received, the BCM will then apply battery voltage from the CTSY/RF TRN fuse through the courtesy lamp supply voltage circuits illuminating the lamps listed below:
• Overhead console lamp
• Roof rail courtesy lamps
• Footwell courtesy lamps The BCM receives battery voltage from the INT LAMPS fuse in order to supply power to the inadvertent courtesy lamps. Inadvertent power courtesy lamp feature provides a similar function for the interior lamps as a retained accessory power feature. The BCM will energize the courtesy lamps supply voltage circuit when the BCM is in the active state (awake). When the inadvertent power courtesy lamps supply voltage circuit is energized, it supplies voltage to all the interior lights listed below. The BCM will continue to supply voltage to the interior lamps after the ignition is turned OFF so that the interior lamps may be operated.
• Overhead Console Reading Lamps
• Roof Rail Reading Lamps
• Vanity Mirror Lamps
• I/P Compartment Lamp
• Rear Compartment Courtesy Lamp
In the event that any of these lamps were to remain illuminated for a period of more than 20 minutes with the ignition switch in the OFF position and no BCM input activity, the BCM will deactivate the inadvertent power supply voltage circuit to prevent a total battery discharge condition. The BCM receives battery voltage from the CTSY/RF TRN fuse in order to supply power to the courtesy lamps. The BCM applies this voltage to the courtesy lamps through the courtesy lamp supply voltage circuits. When any door is opened, the door open switch contacts close and the BCM receives a door-open signal. If the BCM receives a door lock or unlock signal, the BCM will activate the courtesy lamp supply voltage circuit, providing battery voltage to the dome lamps and the left and right footwell courtesy lamps. The courtesy lamps can be manually activated by placing the interior lamp switch in the DOME position. For more detailed information concerning courtesy lamp operation refer to Interior Lighting Systems Description and Operation.

Jan 16, 2017 | Buick Cars & Trucks

1 Answer

My interior light won't come on in my 1999 Buick Lesabre. I have checked the bulb & the fuse. Can anyone help me with this problem? Any ideas are sincerely appreciated.


Courtesy Lights
The courtesy lights come on under the following conditions:
?€¢
Any door is opened.


?€¢
The interior lamp switch is in the ON position.


?€¢
The keyless entry transmitter unlocks the doors (illuminated entry).

When the key is removed from the ignition switch with all of the doors closed, the courtesy lights light for approximately 25 seconds before fading out.
Battery positive voltage (B+) is applied at all times through the IP fuse block CTSY LP/PWR MIR fuse 6A via CKT 640 (ORN) through the body control module (MALL) to the courtesy lights via CKT 1732 (ORN). The MALL provides a ground through CKT 156 (WHT) for the courtesy lights under the following conditions:
?€¢
The MALL receives an input from a door being opened.


?€¢
The MALL receives an input from the interior lamp being turned ON.


?€¢
The MALL receives an input from the doors being unlocked using the keyless entry transmitter.

The courtesy lamps then light.
When the courtesy lights are activated by opening and closing a door, the courtesy lights will remain on for approximately 25 seconds before fading out after all of the doors are closed. If the ignition switch is turned to START or RUN within the 25 seconds, the lights immediately begin to fade out. If a door is left open, the MALL removes battery positive voltage (B+) to the courtesy lights after 10 minutes. When the courtesy lights are activated by the interior lamp switch, the lights remain on as long as the interior lamp switch is in the ON position. When the courtesy lights are activated by unlocking the doors using the keyless entry transmitter, the lights remain on for approximately 40 seconds. If the doors are locked using the keyless entry transmitter within the 40 seconds, the lights immediately begin to fade out.
Body Control Module (MALL) Diagnostic Mode
For a detailed explanation of the MALL module diagnostic mode, refer to Body Control Module Cell 51.
What interior light ? Dome , courtesy lights etc....They don't work with switch, keyless entry , door opening ?
What

Dec 03, 2015 | Buick Cars & Trucks

2 Answers

Interior lights not working


You mite have a DTC - diagnostic trouble code stored in the BCM - body control module , The BCM controls the interior lights ! Have you heard of a BCM ?
DTC B2615
The body control module (BCM) receives a ground signal from the door jamb, liftglass/liftgate, or courtesy lamp switches requesting courtesy/dome lamp illumination. When this occurs, the BCM directly sends a voltage through the courtesy lamp supply voltage circuit illuminating the courtesy/dome lamps.
Conditions for Setting the DTC
?€¢
When the BCM receives a courtesy lamp illumination request signal and the courtesy lamp supply voltage circuit is shorted to ground.

?€¢
When the BCM is not receiving a courtesy lamp illumination request signal and the courtesy lamp supply voltage circuit is shorted to voltage or open only to the first splice from the BCM.

?€¢
There is a loss of the rear fuse block TBC 3 battery supply voltage to the BCM for more than 1 second

Diagnostic Aids
?€¢
Perform a visual inspection for loose or poor connections at all related components. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

?€¢
Only an open circuit up to the first splice from the BCM will set DTC B2615.

DTC B3801
The body control module (BCM) monitors the courtesy lamp switch signal circuit in order to determine when the courtesy/dome lamps should be illuminated. When the BCM senses that the courtesy lamp switch signal circuit is grounded when the switch is activated, the BCM will directly illuminate the courtesy/dome lamps. Do you know what a scan tool is ? not a code reader !
Courtesy Lamps Inoperative




GM Tech 2 Training video 1996

Aug 24, 2015 | 2004 Chevrolet Chevrolet TrailBlazer EXT

2 Answers

2009 dts inside lights stay on


this could be a door switch problem or a BCM problem. access the BCM for codes and data this will help. check to make sure the headlight switch for the interior lights is in the off position.

Mar 20, 2015 | 2009 Cadillac DTS

1 Answer

2004 yukon slt courtesy light relay location


Here is a description of the courtesy lights , there is no relay ! Controlled by the BCM - body control module !
The courtesy/illuminated entry lamps, may be manually turned on or off by placing the interior lamp switch in the ON or OFF position. If an outside door handle is lifted or a door is opened, the courtesy/illuminated entry lamps illuminate. After all the doors have been closed the courtesy/illuminated entry lamps will remain illuminated approximately 15 seconds. The courtesy/illuminated entry lamps will also turn on prior to any door being opened, and remain illuminated approximately 40 seconds when the driver removes the ignition key. When the driver places the dome lamp defeat switch in the OFF position, the courtesy/illuminated entry lamps will be disabled.
The left and right front door courtesy lamps are controlled, and receive voltage and ground from the drivers door module (DDM) and the passenger door module (PDM) respectively. The body control module (BCM), DDM, and the PDM communicate through class 2 serial data for the lamp illumination commands and the door ajar switches.
The remaining courtesy lamps are controlled and receive voltage from the BCM. Voltage for the courtesy lamp supply voltage circuit and the backup lamp supply voltage circuit is from the TBC B fuse in the instrument panel fuse block directly through the BCM to these circuits. A short to ground on either of these circuits will open the fuse. Ground is provided to the footwell lamps and all courtesy/reading lamps at G203. Ground is provided to the right middle and right rear door at G306. Ground is provided to the left middle and left rear door at G302.

Mar 17, 2015 | Cars & Trucks

1 Answer

2002 ford expedition interior lights are not on what fuse is it?


Courtesy Lamps - central junction box. fuse # F1.21 that goes to interior lamp relay in the instrument cluster and F.24 this fuse powers battery saver relay .
Interior Lighting The interior light system consists of the following:
  • front map lamp assembly
  • front door courtesy lamp
  • generic electronic module (GEM)
  • glove box lamp assembly
  • central security module
  • interior lamp switch
  • interior lamp relay
  • illuminated vanity mirrors (Navigator only)
  • reading lamp assembly
  • rear courtesy lamp
  • running board lamp
  • underhood lamp assembly
  • The generic electronic module (GEM) illuminates the interior lamps when an unlock signal is received from the remote anti-theft personality central security module. The illuminated entry feature will be canceled when any of the following conditions are met:
    • 25 seconds have elapsed since the illuminated entry feature was activated and the interior lamp control is not activated (door ajar or courtesy lamp switch on).
    • The GEM receives a request from the central security module (remote transmitter lock button pressed) and the interior lamp control is not activated.
    • The ignition is in the RUN or START position and the interior lamp control is not activated.
    The GEM will illuminate the interior lamps when any door is open or ajar. The interior lamps are; the dome lamp, the rear cargo lamp, the door courtesy lamp and the side rail lamps. The courtesy lamps will shut off when the doors are closed and the illuminated entry feature is not active or when the vehicle speed is greater than 5 mph (8 km/h). The interior lamps will not be reactivated until the vehicle speed is less than 3 mph (5 km/h) and a new door open warning lamp switch is received.
    The GEM controls the interior lamps illuminated entry function by activating the interior lamp relay.
  • You have an electronic control module and relays involved in the operation of these lights also !

  • What

    Jan 08, 2015 | 2002 Ford Expedition

    1 Answer

    2000 chevy monte carlo door latch assy. replacement


    all the lights above the dash do not work ?????? DOME light's ??? No light's come on when you open the door or any door ? Wouldn't think all the door ajar switches bad at one time .
    Interior Lamps
    The interior lamps consists of two groups, lamps that can not be dimmed and lamps that can be dimmed. This first group consists of lamps that may not be dimmed. This Includes those lamps that may be manually turned on by placing the interior lamp switch to the DOME position, or by opening a door or a compartment:
    • Auxiliary dome lamp (SEO, RPO 6C7)
    • Dome lamp
    • instrument panel (I/P) compartment lamp
    • Inside rear view mirror lamps
    • I/P courtesy lamps
    • Reading lamps
    • Rear compartment courtesy lamp
    • Sunshade vanity mirror lamps
    Battery positive voltage is applied at all times to the DIC/RKE fuse and to the switched side of the BATT RUNDOWN PROTECTION relay in the right I/P junction block. The DIC/RKE fuse supplies battery positive voltage to the coil side of the BATT RUNDOWN PROTECTION relay. When the ignition is turned to the ON position, the body control module (BCM) provides a ground to the Inadvertent relay control circuit. This energizes the BATT RUNDOWN PROTECTION relay and applies battery positive voltage to I/P BRP fuse and to the TRK/ROOF/BRP fuse. Battery positive voltage is applied from the I/P BRP fuse to the I/P courtesy lamps, I/P compartment lamp and to the I/P compartment feed circuit to the BCM. Battery positive voltage is also applied from the TRK/ROOF/BRP fuse to the:

    If the BCM receives a door lock or unlock input signal, the BCM will activate the BATT RUNDOWN PROTECTION relay, which provides battery positive voltage to all interior courtesy lamps. When any door is opened, the door jam switch contacts close and the BCM receives a door-open input signal. The BCM then applies a ground to the theater dimming ground control circuit illuminating the courtesy and dome lamps.
    After all the doors are closed, the courtesy lamps remain illuminated for approximately 40 seconds. The courtesy lamps will also turn on and remain illuminated for approximately 15 seconds after the ignition key is removed, prior to any door being opened.
    When the headlamp switch is placed in the DOME position, the BCM receives a ground signal. The BCM then applies a ground to the theater dimming ground control circuit. This illuminates the dome and roof rail lamps.
    The courtesy lamps will normally turn off using the theater dimming feature. The BCM provides a pulse width modulated ground to all courtesy/reading, dome, and inside rear view mirror lamps for the theater dimming feature. The BCM will immediately turn off the courtesy lamps if a door lock command is received with all the doors closed, or if the ignition switch is turned to either the ON or RUN position.
    The BCM activates the interior lighting output 15 seconds after receiving the class 2 message "Airbags Deployed" from the sensing and diagnostic module (SDM). The interior lamps remain activated for 25 minutes.

    The door ajar switch is part of the lock actuator inside the door !

    Jul 01, 2017 | 2000 Chevrolet Monte Carlo

    1 Answer

    Dome Light (switched circuit now working) Shorted it out


    Why didn't you hook into the entertainment system (radio ) ?
    The one that turns on when the door opens is controlled by the BCM -body control module .You probably shorted out the transistor in side the BCM .
    These lamps may be manually turned on by placing the interior lamp switch in the ON position, or by opening a door.
    • The Dome Lamp
    • The Rear Compartment Courtesy Lamp
    • The Rear View Mirror Map Lights
    The inadvertent power control circuit of the BCM supplies battery positive voltage to the dome lamp and the map lamps. When any door is opened, the door jamb switch contacts close providing a door open input to the BCM. The BCM then provides a ground to the interior lamps. The interior lamps receive a ground at G401 or G403.
    If the driver inadvertently leaves any interior lamp on the BCM will turn it off after a 20 minute time-out.
    The courtesy lamps will normally turn off using the theater dimming feature. The BCM provides a pulse width modulated ground to the interior lamps for the theater dimming feature. The courtesy lamps will also turn off immediately if a door lock command is received with all the doors closed, or if the ignition switch is turned to the ON position.

    --------------------------------------------------------------------------------
    Dome Lamps Inoperative
    ematic Reference: Interior Lights Schematics
    DEFINITION: Only the dome lamp is inoperative.
    1
    Did you perform the Diagnostic System Check - Vehicle?
    YES - Go to Step 2
    NO - Go to Diagnostic System Check - Vehicle
    2
    Place the instrument panel (I/P) dimmer switch in the DOME position.
    Does the dome lamp illuminate?
    YES - Go to Testing for Intermittent Conditions and Poor Connections
    NO - Go to Step 3
    3
    Disconnect the dome lamp assembly.
    Probe the courtesy lamp supply voltage circuit with a test lamp that is connected to a good ground.
    Does the test lamp illuminate?
    YES - Go to Step 4
    NO - Go to Step 6
    4
    Connect the test lamp between the courtesy lamp supply voltage circuit and the courtesy lamp low control circuit.
    Does the test lamp illuminate?
    YES - Go to Step 5
    NO - Go to Step 7
    5
    Inspect for poor connections at the harness connector of the dome lamp assembly. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .
    Did you find and correct the condition?
    YES - Go to Step 9
    NO - Go to Step 8
    6
    Repair an open, high resistance, or short to ground in the courtesy lamp supply voltage circuit. Refer to Circuit Testing and Wiring Repairs .
    YES - Did you complete the repair?
    NO - Go to Step 9
    --
    7
    Repair an open or high resistance in the courtesy lamp low control circuit. Refer to Circuit Testing and Wiring Repairs .
    YES - Did you complete the repair?
    NO - Go to Step 9
    --
    8
    Replace the dome lamp assembly. Refer to Dome Lamp Replacement .
    YES - Did you complete the replacement?
    NO - Go to Step 9
    --
    9
    Operate the system in order to verify the repair.
    Did you correct the condition?
    YES - System OK
    NO - Go to Step 3

    Mar 21, 2017 | 2007 Saturn ION-2 Quad Coupe

    1 Answer

    2004 crown vic interior lights stay on


    Don't think you have a door ajar switch problem , more then like the lighting control module is the culprit . Does the door ajar light on the instrument cluster stay lit ?
    The interior lighting can be separated into two distinct modes of operation: the courtesy lighting and the demand lighting. The lighting control module (LCM) controls all of the interior lighting in the vehicle, as described in the following text.
    The front dome lamps, rear reading lamps, and instrument panel courtesy lamps, can be illuminated either by opening any of the vehicle doors (courtesy lamp function) or by depressing the headlamp switch (demand lamp function).
    When any door is open, the door ajar switch grounds an input to the LCM which then sends power to the courtesy lamps. The voltage sent to the courtesy lamps gradually increases from 0 volts to 12 volts within 500 ms (± 50 ms), to achieve the theater lighting effect. When the door(s) are closed the door ajar switch(es) break(s) the ground to the LCM input which then gradually reduces the power from 12 volts to 0 volts within 5 seconds. (± .5 second).
    When the headlamp switch is depressed it grounds an input to the LCM which in turn sends 12 volts to the front dome lamps, rear reading lamps, and instrument panel courtesy lamps. When the headlamp switch is depressed a second time, it breaks the ground to the LCM input which then ceases to send power to the front dome lamps, rear reading lamps, and instrument panel courtesy lamps.

    The battery saver will disrupt power to the courtesy lamps after 10 minutes, the demand lamps after 30 minutes, and the headlamps after 10 minutes. Turning the ignition switch to the RUN or ACC position will terminate the battery saver feature by disabling the interrupt timers and reinstate power to the lamps.
    Do you know what DTC'S are ? diagnostic trouble codes !
    LCM Diagnostic Trouble Code (DTC) Index DTC Description Source Action B1322 Driver Door Ajar Circuit Short to Ground LCM Go To Pinpoint Test F . B1442 Door Handle Switch Circuit Failure LCM Go To Pinpoint Test G . B1445 Door Handle Switch Circuit Short to Ground LCM Go To Pinpoint Test G . B1563 Door Ajar Circuit Failure LCM Go To Pinpoint Test C . B1566 Door Ajar Circuit Short to Ground LCM Go To Pinpoint Test H . B1685 Lamp Dome Input Circuit Failure LCM Go To Pinpoint Test I . B1687 Lamp Dome Input Circuit Short to Battery LCM Go To Pinpoint Test I . - All Other DTCs LCM REFER to Section 419-10 .

    PINPOINT TEST C: THE COURTESY LAMPS STAY ON CONTINUOUSLY CONDITIONS DETAILS/RESULTS/ACTIONS C1 CHECK THE SYSTEM OPERATION Open and close each door, making sure that each door is completely closed.
    • Are the courtesy lamps still illuminated after the 25 second time-out period?
    Yes GO to C2 .

    No The system is operating correctly. C2 TEST DOME LAMP SWITCH Depress the dome lamp switch.
    • Are the courtesy lamps still illuminated?
    Yes DEPRESS the dome lamp switch a second time. GO to C3 .

    No The system is operating correctly. C3 CHECK THE LIGHTING CONTROL MODULE
    LCM C2145a

    • Are the courtesy lamps still illuminated?
    Yes REPAIR circuit 53 (BK/LB). REPEAT the self-test. CLEAR the DTCs.

    No INSTALL a new LCM. REFER to Section 419-10 . REPEAT the self-test. CLEAR the DTCs.

    Apr 16, 2017 | 2004 Ford Crown Victoria

    2 Answers

    2009 ford focus dome light stays on


    Are you sure that the thumb wheel switch beside the headlamp switch is not turned all the way up until it clicks?
    If it is staying on for 10 minutes this means that the smart junction box is seeing a demand for the interior lights from something like a door ajar switch or the thumb wheel. If it sees that the igntion is in the off position it will turn the lights off after 10 minutes to conserve battery power.
    Normal operation is:
    The interior lighting delay feature provides temporary illumination of the courtesy lamps after the doors are opened and then closed. The interior lighting delay feature keeps the courtesy lamps on for a period of 25 seconds after all the doors are closed. If during the 25-second delay time the SJB detects that the ignition has been switched out of off, or if the vehicle is locked using the RKE, the courtesy lamp illumination is discontinued

    Mar 24, 2009 | 2009 Ford Focus

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