Question about 2008 GMC Sierra 2500HD 2WD

1 Answer

Can I change the off delay on my lights

Both interior and exterior lights on 2008 2500 hd

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  • ghooper37397 Nov 28, 2008

    the changes are not available on this model.....can the parameters be changed by connection to a dianostic tool?

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You can do this through the onboard computer in the dashboard try going through the setup functions by using the setup button on the dash. 
If i had one in front of me i could change it in a heartbeat its very easy to do

Posted on Nov 28, 2008

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2004 Lincoln navigator interior lights don't come on when unlock. Sometimes auto headlights don't come on, seats don't move. Liftgate won't open until vehicle is started. Is this a relay or fuse?


. When you open the door or just unlock the door the lights don't come on ?
Vehicle Security Module The vehicle security module receives inputs from the following:
  • door ajar switches
  • keyless entry keypad
  • ignition switch
  • remote keyless entry transmitter
The vehicle security module uses these inputs to control an output signal to the instrument cluster which controls the battery saver relay and courtesy lamp output.
Interior Lighting Systems The instrument cluster grounds the battery saver relay and supplies the power for courtesy lamps when any door ajar switch is opened, or the interior lamp (headlamp) switch is closed. The instrument cluster then supplies voltage to the interior lamp circuit. Vehicle speed must be less than 24 kph (15 mph) for the instrument cluster module to keep courtesy lamps on. The interior lamps will remain illuminated for up to 25 seconds after all doors are closed unless the instrument cluster module receives an input from any of the following:
  • voltage from the ignition switch
  • a vehicle speed signal
  • input from the keyless entry keypad through the vehicle security module
  • input from the remote keyless entry transmitter lock or panic switch through the vehicle security module
Do you know what body control system DTC'S - diagnostic trouble codes are ?
Instrument Cluster Diagnostic Trouble Code Index DTC Description Source Action B1342 ECU is Defective Instrument Cluster REFER to Section 413-01 . B2499 Courtesy Lamp Output Failure Instrument Cluster Go To Pinpoint Test A . B1320 Driver Door Ajar Circuit Open Instrument Cluster Go To Pinpoint Test A . B1328 Passenger Door Ajar Circuit Open Instrument Cluster Go To Pinpoint Test A . - All Other DTCs Instrument Cluster REFER to Section 419-10 .
Principles of Operation
The autolamp system provides light-sensitive automatic on/off control of the headlamps and parking lamps controlled by the vehicle security module when the headlamp switch is in the autolamps position. When the ignition switch is turned to the RUN or START position with the autolamps feature already enabled and the ambient light level is dark, the vehicle security module will request the headlamps and parking lamps be turned on. When the autolamps are disabled, the vehicle security module will request the headlamps and parking lamps to be turned off, regardless of the ignition switch position. When the vehicle security module has turned on the exterior lamps and the ignition is turned to the OFF or ACCY position, the exterior lamps will remain on for an additional time specified by the customer or the headlamp switch is turned off.
When the autolamps have been enabled and the ignition switch is in the RUN/START position, the vehicle security module will request that the exterior lamps be turned on or off based on ambient light level. If the vehicle enters darkness for at least 15 seconds, the vehicle security module will request the exterior lamps on. If the vehicle enters light for at least 15 seconds, the vehicle security module will request the exterior lamps off. By delaying turning on and off the exterior lamps during short periods of darkness and light, the vehicle security module prevents the exterior lamps from flashing on and off.

  • The autolamps are inoperative - do not operate correctly
  • Circuitry.
  • Photocell.
  • Headlamp switch.
  • Vehicle security module.
  • Go To Pinpoint Test G .

Power Lock
The power lock/unlock feature requests all of the vehicle doors, including the liftgate, be locked or unlocked upon a customer request from any interior door lock switch in the vehicle. The power door locking system functions independently of ignition status or vehicle speed. When the vehicle security module receives an unlock/lock command from any door lock control switch, the vehicle security module will activate relays internal to the module to supply the correct power and grounds for the door lock actuators.
Your best bet , take it to a qualified repair shop .

Feb 25, 2018 | Lincoln Cars & Trucks

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Interior lights,cargo light and exterior mirrors don't work.


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Jul 28, 2015 | 2004 Dodge Ram 1500

1 Answer

Only the headlights work no exterior or interior. the lights come on when you open the door.


More than likely a bad headlight switch. check the fuses first, spray some WD40 into the switch second, and third; replace the headlight switch.

Jul 26, 2014 | 2004 Pontiac Grand Am

1 Answer

Interior lights and exterior parking lights and tail lights dont work and all the fuses are good


sounds like your light switch is bad..that's the only place all those share in common.

Jan 11, 2013 | 1986 Nissan Pickup 4WD 1986

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Eagle vision 1996 interior lights won't turn off


hello , you have to replace the interior light delay relay

Dec 11, 2012 | 1996 Eagle Vision

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The lights will go off sometime during the next four hours. This car does not have the automatic lights. One night they came on by themselves.


interior lights or exterior

most interior light concerns like yours are due to a door ajar switch issue

exterior lights could be something a little more serious

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1 Answer

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check the ground and power cables most likely broken or loose . now pay me

Nov 20, 2009 | 2003 Dodge Caravan

1 Answer

Hi, i have cadillac sedan deville 1994 , the light sensor always read dark , so the exterior lights always on , besides when i open the door and the interior lights goes on , so the exterior lights goes...


hi
problem solved after cleaning the light sensor but the problem of twilight sentinel always exist , so if the twilight on the way of MAX the lights will remain 90 seconds ON but if i open the door and the interior lights will go on so the exterior lights will go OFF , what might be the problem?

Dec 10, 2008 | 1994 Cadillac DeVille

1 Answer

1992 Range Rover


Yes, it sounds like it burned the contact points in the dome light delay. They were never really designed to have the lights left on for that long (and being 13 years old, it has already had some usage before this)
The part you need is PRC9948G (I would double check that with your dealer).
It is the delay courtesy relay.

Sep 06, 2008 | 1995 Land Rover Range Rover

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