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What fuse should i remove to prevent the courtesy lights from coming on if i remove the doors?

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Door switch and door lock fuses

Posted on May 28, 2011

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2008 Saturn Vue Hybrid courtesy lights up front and mid cabin don't go on when door is open. Rear cargo does. Otherwise they do work


When the body control module (BCM) is in an active state (awake) it energizes the courtesy lamps supply voltage circuit. The courtesy lamps supply voltage circuit supplies voltage to all of the interior lamps, including the illuminated entry lamps (courtesy lamps). The illuminated entry lamps are turned ON when they receive a battery positive voltage from the courtesy lamp supply voltage circuit of the BCM. When the ignition is in the LOCK position the BCM will apply the courtesy lamp supply voltage circuit under the following conditions:
• The door jamb input transitions to an active state (opening a door).
• The use of the remote keyless entry (RKE) to unlock the side doors.

Do you know how to do automotive electrical circuit testing using a DVOM- digital volt ohm meter and a wiring diagram to pin point testing areas of a circuit ?
Circuit/System Description
The body control module (BCM) applies battery voltage to the courtesy lamps through 2 separately controlled courtesy lamp supply voltage circuits. When any door is opened, the door ajar switch contacts close and the BCM receives a door-ajar input. If the BCM receives a door lock or unlock input or a rear hatch open input, the BCM will activate the courtesy lamp supply voltage circuits, providing battery voltage to all of the instrument panel (I/P) courtesy lamps, dome lamps, rearview mirror lamps, and rear compartment lamps. In the event that any of these lamps were to remain illuminated for more than 20 minutes with the ignition switch in the OFF position, the BCM will deactivate the courtesy lamp control circuits to prevent a total battery discharge condition.

You can view free wiring diagrams here http://www.bbbind.com/free_tsb.html Enter vehicle info. year , make , model and engine ! Under system click on lighting ,then under subsystem click on interior lighting . Click the search button then the blue link. Looking at the first diagram you will see on the top left a fuse box , this B+ for the BCM ,top right is the BCM .You will see three wires coming out the bottom of the BCM , these go to your courtesy lamps , The thing's that look like a open switch inside the BCM , they are transistors or high side drivers . When commanded these supply B+ voltage to the lights . Finding the BCM an testing output voltage would be my first step , before taking the inside of the vehicle apart to find wiring harness to test .

Jul 01, 2017 | Saturn Cars & Trucks

1 Answer

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

1 Answer

I have a 2004 Silverado and when I open the passage door none of the inside lights come on but the drivers side does please help


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 II 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.
There could be a DTC - diagnostic trouble code stored in the BCM
DTC B2615
The body control module (BCM) receives a ground signal from the door jamb, liftglass/liftgate if equipped, 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.
Voltage for the courtesy lamp supply voltage circuit as well as the backup lamp supply voltage circuit is from the left instrument panel fuse block TBC 2B 15-amp fuse directly through the BCM to these circuits
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 illuminate the courtesy/dome lamps.
Inspect the following related body control module (BCM), driver door module (DDM), and passenger door module (PDM) data parameters. Refer to Scan Tool Data List or Scan Tool Data Definitions for typical values and definitions:
?€¢
The courtesy lamp switch


?€¢
The interior lamp defeat switch


?€¢
The door ajar switches

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Oct 20, 2015 | Cars & Trucks

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

2 Answers

The coutesy light does not come on when the door is opened every thing else works


If the bulb lights when another door is opened, replace the plunger switch in the jamb of the problem door.
If you are not getting a light when *any* door is opened, check your fuse (often labeled "Courtesy" or "CTSY" in your fuse box). Fuse box can be under the driver's side of the dash or in the engine compartment. Add a comment to your post with the year, make, and model of your vehicle for more specific details about the location of your fuse box, if needed.

Feb 12, 2015 | Cars & Trucks

1 Answer

Courtesy lights stay on after the door has been closed on my 98 LeSabre. What is the cause of that and can I remove the fuse to get the lights off so the battery isn't drained?


Hi Dennis,

Your courtesy lights are controlled by your Body Control Module (BCM). Normal operation is for the courtesy lights to stay on for 2-3 minutes after the door is closed, then turn off.If they stay on longer than about 3 minutes, then there are several possible causes:

1. You may have the "courtesy lamp override switch" in the overide position in the dimmer control on the dash.

2. you may have a door that is not completely closed. You need to check ALL of them.

3. You could have a defective door switch or dimmer control switch

4. you could have a short to ground in one of the door control switch circuits, causing the BCM to "think" that there is a door open.

The CORRECT way to fix this would be to scan your BCM for fault codes and also read the BCM data to find out if it is showing one of the doors as being open when they clearly are not, so you will know which door is causing the problem.

Removing the courtesy lamp fuse will NOT completely fix the battery drain problem if these circuits are shorted or malfunctioning because the BCM will STILL be "trying" to turn these lights on and this will also cause an excessive draw on your battery. However, removing the 15 Amp fuse marked "CTSY LMP/MIRROR" located in the instrument panel fuse block will get the lights turned off and at least slow down how fast your battery is draining.

Oct 25, 2011 | 1998 Buick LeSabre

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