Question about 1999 Chevrolet Tahoe

1 Answer

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
  • 919 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
  • 576 Answers

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

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

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

    The interior lights on my father-in law's 2000 Safari are all inop (6 spots plus two dome lights) I can't find a fuse in the engine box for them. Is there another fuse box. The van has a dome overr


    Does the van have remote keyless entry (RKE) system ?
    Interior Lighting System Description
    Vehicles with the optional remote keyless entry (RKE) system have interior lighting controlled by the body control module (BCM).
    This vehicle uses a delayed interior lighting system.
    The system functions as follows:
    • The dome lamps will illuminate when any door is opened.
    • The dome lamps will remain on for 20 seconds after the last door is closed.
    • The delay is canceled and the dome lamps will go out when the ignition switch is turned to the ON position.
    • The illuminated entry function will not operate when the dome lamp defeat switch is in the OFF position.
    • The interior lighting system is protected from battery rundown by the retained accessory power (RAP) system. The RAP system functions by shutting down interior lights after 10 minutes (when ignition is OFF).

    Interior Lights Circuit Description
    When the interior lamps circuits are closed/enabled, the courtesy lamp relay is activated by the two following coil circuits:
    • CKT 690 (GRY/BLK) which is the courtesy lamp enable output of the body control module (BCM) driving the coil side of the relay.
    • CKT 1732 (ORN) which is the coil output side of the relay going to the potential grounding switches/sources.
    When the courtesy lamp relay is enabled, CKT 156 (WHT) (courtesy lamp output) is enabled by the closed contact at the relay and then grounded by CKT 750 (BLK) at G110.
    Some of these circuits can also be activated with the headlamp and panel dimmer switch. When this happens, the coil output side of the inadvertent power relay is grounded to the body control module (BCM) via CKT 1393 (DK BLU)
    CKT 40 (ORN) from the courtesy fuse drives both input sides of the inadvertent power relay. When the contact is pulled closed, CKT 1732 (ORN) is supplied power, thus driving any lamps/circuits attached that circuit and providing ground.
    The body control module (BCM) also monitors the following four door inputs:
    • CKT 49 (DK BLU) -- LH door jamb switch input
    • CKT 54 (ORN) -- RH door jamb switch input
    • CKT 775 (PNK) -- Side door jamb switch input
    • CKT 656 (YEL) -- Rear door jamb switch input/liftgate strut switch input (depending on option content)
    When the doors are closed, the body control module (BCM) is in a floating state of 0-2 volts. When the doors are opened, the courtesy lamp relay is activated, sending power to the courtesy lamps.
    The headlamp and panel dimmer switch also activates the following interior courtesy lamps when the switch is placed in the PARK or HEADLAMP ON positions:
    • RF power window switch
    • RH power door lock switch
    • LH power window switch
    • LH power door lock switch
    • LH outside rearview mirror control switch
    • Rear radio control head
    The dome lamps can be disabled by closing the dome lamp defeat switch located on the headlamp and panel dimmer switch.

    --------------------------------------------------------------------------------
    Courtesy or Dome Lamps Inoperative
    Step
    Action
    Value(s)
    Yes
    No
    Important: Verify functional bulbs before beginning diagnostic procedure.
    1
    Did you perform the Lighting Diagnostic System Check?
    --
    YES - Go to Step 2
    NO - Go to Diagnostic System Check - Lighting Systems
    2
    Are all of the courtesy/dome lamps inoperative?
    --
    YES - Go to Step 6
    NO - Go to Step 3
    3
    Activate courtesy/dome lamps
    With DMM, check for battery voltage from inoperative lamp CKT 1732 (ORN) to ground
    Is battery voltage present?
    B+
    YES - Go to Step 4
    NO - Go to Step 5
    4
    Repair open in CKT 156 (WHT) between inoperative lamp assemply and S214.
    Is the repair complete?
    --
    NO - Go to Step 10
    --
    5
    Repair open in CKT 1732 (ORN) between inoperative lamp assemply and one of the following splices:
    • S258
    • S301
    Is the repair complete?
    --
    Go to Step 10
    --
    6
    Turn the courtesy lamp switch to the ON position
    Check for battery voltage at BCM C2 cavity B12.
    Is battery voltage present?
    B+
    Go to Step 7
    Go to Diagnostic System Check - Body Control System in Body Control Systems
    7
    Verify continuity of the following three circuits with DMM:
    • CKT 1732 (ORN) between courtesy lamp relay and body control module
    • CKT 156 (WHT) between courtesy lamp relay and S214
    • CKT 750 (BLK) between courtesy lamp relay and S206
    Are all of the circuits functional?
    --
    Go to Step 8
    Go to Step 9
    8
    Replace courtesy lamp relay.
    Is repair complete?
    --
    Go to Step 10
    --
    9
    Repair the inoperative circuit.
    Is the repair complete?
    --
    Go to Step 10
    --
    10
    Operate the system in order to verify the repair.
    Did you correct the condition?
    --
    System OK
    Go to Step 2

    Mar 01, 2018 | 2000 GMC Safari

    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

    1 Answer

    Saturn Turn Signal / Dome Light Issues


    The interior lamps system consists of 2 main features. Illuminated entry and a battery saver feature that will turn the interior lights off after 20 minutes if they are left On with all doors closed and the ignition Off. The body control module (BCM) controls both of these functions. Battery power is supplied by the BCM through CKT 1732 to the following lamps:
    • The dome lamp
    • The map lamps
    • The rear reading lamps
    • The rear dome lamp
    • The cargo lamp
    • The glove compartment lamp
    • The courtesy lamps
    • The sunshade lamps
    The BCM also controls the ground circuit side of the dome lamp and reading lamps for illuminated entry. The dome lamp and reading lamp will remain on for 20 seconds after the ignition key is removed and the last door is closed. In addition, if the vehicle is equipped with remote keyless entry (RKE), the dome and reading lamps will turn On and stay on for 20 seconds after an UNLOCK signal is received from the keyless entry transmitter.
    The reading lamps, dome lamp and map lamps can be turned On at any time by moving the appropriate switch to the On position.
    The rear dome lamp is fed battery voltage through CKT 1732 from the BCM, through the liftgate ajar switch, and is grounded through CKT 650 to the rear ground splice pack. The rear dome lamp will turn on when the liftgate is opened. The cargo lamp is fed battery voltage through CKT 1732 from the BCM, through CKT 744 and grounded through the decklid ajar switch.
    The courtesy lamps are fed battery power through CKT 1732 and are grounded through CKT 745-- left front, CKT 747--left rear, CKT 748--right rear, CKT 746--right front. These circuits will ground through the door jamb switches. The courtesy lamp will be illuminated when the affected door is opened. For example, when the right rear door is opened, the right rear door courtesy lamp will turn on.

    Not a fuse problem , if the BCM had blown fuse other thing's wouldn't be working as well . . Probably wiring or BCM . Using factory diagnostic,s instead of guessing as to what the problem is , is the proper way .

    Interior Lamps Diagnosis
    Symptom
    Procedure
    Important: Before proceeding with these diagnostics, check for DTCs. If DTCs are present, complete the associated diagnostics. If the condition still exists, return to this chart.
    All of the interior lamps are inoperative when any door is opened.
    Chart 1
    The dome lamp is inoperative in the ON position, but OK in the door position. The map lamps operate normally.
    The dome lamp switch is faulty. Replace the dome lamp switch.
    The dome lamp is inoperative in the DOOR position, but is OK in the ON position.
    Chart 2
    The dome lamp is inoperative in any position and both reading lamps are inoperative.
    Disconnect the dome lamp connector (BLK 3-way).
    Check for voltage at terminal "C" CKT 1732 ORN wire.
    If OK, the dome/map lamp is faulty. If no voltage is present, there is an OPEN in CKT 1732.
    Either the right or the left sunshade mirror lamp is inoperative.
    Chart 3
    Either the right or the left rear reading lamp is inoperative in the ON or the DOOR position.
    Chart 4
    The rear reading lamp is inoperative in the ON or the DOOR position.
    Chart 5
    Battery rundown protection is shorted to ground - B1482.
    B1482
    The left rear reading lamp is inoperative in the ON or the DOOR position.
    Chart 6

    Dec 12, 2017 | 1998 Saturn SL

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