Question about 1989 Buick LeSabre

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Dome and courtesy lights non functional. Checked bulbs, fuse and switch.

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Replace switch on dash that turns them on.

Posted on Jul 02, 2009

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Posted on Jan 02, 2017

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Fuse dome light 2000park avenue


Did you try a new bulb ? Not a fuse ,
Interior Lamp Control
The BCM controls the function of the courtesy lamps. The IP fuse block BCM fuse supplies battery positive voltage (B+) at all times to the BCM inadvertent power output. Battery positive voltage (B+) is supplied to the courtesy lamps as described above. The BCM provides a ground path to the courtesy lamps from the theatre dim-1 and the theatre dim-2 outputs. The BCM activates the outputs when a door is opened or the courtesy lamp switch activates. The outputs are deactivated when the BCM detects that all of the doors are closed and the courtesy lamp switches are inactive. If the outputs are deactivated because of a door closing, the outputs are deactivated with the theatre dimming function. The theatre dimming function causes the lamps to fade out gradually over a period of 3 seconds. If the outputs are deactivated by a courtesy lamp switch, the outputs are deactivated immediately without the theatre dimming function.

Jun 04, 2018 | Cars & Trucks

1 Answer

I have a 06 mercedes e350 and my dashboard lights quit working. I have checked the fuse and it was ok. what could the problem be


check the courtesy/dome light fuse and see that the manual dimmer/dome switch isn't turned down.

Dec 10, 2016 | Cars & Trucks

1 Answer

Hi there I have an 04 Honda Accord 2.2i ctdi sport and I was installing projector lights into the door courtesy lights now the courtesy lights on the drivers side aren't working.


Could be a bad light switch in the driver's door. You can check and see if you have power on the driver's door with a tester before you purchase a new switch.

Nov 11, 2015 | Honda 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

Dome light relay


Door courtesy switch malfunction.Dome switch mallfunction.Front body chassis windscreen pillar (columns)masks reveal wiring.Cheers,hope u figure it out,let the masses know.

Oct 26, 2013 | Nissan Maxima Cars & Trucks

1 Answer

1997 Dodge caravan. Dome lights(2) and tailgate courtesy lights(2) do not turn on. with either 1.opening the tailgate; 2. opening any other door ; 3. using the in dash switch. Trouble shooting: 1 Checked...


Not sure about your car but on my KIA the dome and rear gate light have switches on the light assemblies themselves for on/off all time/on with door. Check to see if you have same. Also, there may be another "dash" switch, typically on the dash dimmer switch which may be turned all the way from dim to off. Check your dash dimmer switch. Relays are typically in a fuse box under the hood.

Jun 04, 2017 | 1997 Dodge Caravan

1 Answer

2006 chevy trailblazer dome light will not shut off


There is no fuse marked for dome light's in the rear fuse box. The BCM - body control module controls the dome / courtesy light's .
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.
DTC B3801 Passenger Compartment Lamp Request Circuit

You should possibly think about taking your vehicle to a qualified repair shop !
Install a scan tool.
Turn ON the ignition, with the engine OFF.
With a scan tool, observe the courtesy lamp switch parameter in the body control module (BCM) data list.
Does the scan tool display INACTIVE?
YES - Go to Step 3
NO - Go to Step 4
3
Activate the courtesy lamp switch.
With the scan tool, observe the courtesy lamp switch data parameter.
Does the courtesy lamp switch data parameter change state?

• Test the courtesy lamp switch for sticking in the ON position.
• 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.

Nov 24, 2017 | 2006 Chevrolet Trailblazer

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

When changing a bulb in the front passenger side door (courtesy light bulb), It somehow arced (touched positive to ground) and it shorted, now my dome lighs, my cargo lights (exterior) and all of my...


I would double check all of the fuses,under the dash and hood. Sounds like you might have missed 1. If ALL of the fuses are good and you do not find any broken/burnt wires,,,, I am afraid you took out the GEM module. That will be costly.

Jul 30, 2009 | Ford F-150 Cars & Trucks

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