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I have an 06 Buick Lucerne rear courtesy lights do not work front courtesy lights work fine?

Posted by Jim culver on

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Jeff Armer

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  • Buick Master
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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.
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.

Posted on Feb 15, 2018

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5 Related Answers

Anonymous

  • 1 Answer

SOURCE: 1993 R/R Classic Rear wiper

I had a related problem in that the courtesy lights would not go off ! I replaced the courtesy light relay under the steering wheel cowl and it cured the problem ! I suspect that your problem may be the faulty relay.regards , bob whild (u.k.)

Posted on Mar 19, 2009

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Anonymous

  • 91 Answers

SOURCE: Rear interior light and door courtesy lights not working- Jaguar

take off the cover and replace them. if you have a volt/ohm meter you can put if on the car side and make sure you have voltage and the ohm meter on the buldb should give a 1 rating if its good. it would be the cheapest and easiest to just get a new bulb and see if it works then start checking fuses if its not the bulb.

Posted on Mar 31, 2009

Anonymous

  • 7 Answers

SOURCE: how to remove engine cover to get at rear spark

Unscrew the oil filler neck and the cover will just lift off.

Posted on Jan 12, 2010

zcomputerwiz

zcomputerwiz

  • 92 Answers

SOURCE: 93 buick regal courtesy lights stay on when car is off

One of your door sensors (or trunk sensor) is signaling that it is open or the dimmer switch is turned all the way up, which turns on the dome and foot lamps. Try turning the dimmer switch all the way down. If this does not fix the problem you will have to get all the door sensors (and trunk sensor) tested to determine which one needs to be replaced.

Posted on Mar 16, 2010

clifford224

Clifford Beard

  • 1975 Answers

SOURCE: cant get 06 buick lucerne

You have a transaxle shift lock on your vehicle which as I'm sure you know the brakes nust be applied in order to shift out of park. The switch could be bad or if your battery is below 9 volts this will happen. Most cars have a spot where you can stick a key or a screwdriver in to bypass it. Guess what? you don't on your vehicle but there is a way to bypass it and it will work about 90 percent of the time. Apply the brake and then try to shift normally. If it won't shift (which is your problem in the first place) ease of on the pressure as far as trying to shift but don't let a go. Push the lever foward GENTLY as if you are putting it in park all the way. Keep the brake pedal pushed in at all times while you are doing this. After you gently "put it back in park" then try to change gears. No jerking motions just nice and smoothly do it. This is the only way it will work unless you get down and do electrical kind of bypassing on the switch which would be very hard for me to explain because I don't have the wire color codes and stuff to give you. I do hope this works and good luck.

Posted on May 14, 2011

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2 Answers

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If the rear light on the other side goes on and off by pushing on the light then i would say the switch in the one that stays lit it either stuck or broken and may need to be replaced. i think you could stop by a body shop and they would be able to do it for less money that a Buick dealer would.

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Rear Compartment Lamp
The BCM supplies battery positive voltage from the INT LAMPS fuse at all times through the inadvertent power courtesy lamps circuit to the rear compartment lamp. When the rear compartment is opened, the rear compartment lamp switch closes to ground and the lamp illuminates.

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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

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• 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.

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Are you talking about the front hood or the rear hatch? My info says the front hood uses a release cable, not electric. The rear hatch is electric.
If your front hood is electric, my database doesn't show it?

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1 Answer

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Please take a multi-meter or an ohm meter and see if you have voltage coming to the light.
If not, suspect a bad door switch, as they are cheap plastic.
If so, suspect a bad light bulb socket, same reason as above.
God bless your efforts.

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1 Answer

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