Question about Dodge Ram 2500

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Dome lights turn off too soon

When I turn on the dome lights (either by the switch or by opening a door), they shut off after 5 seconds. This includes all dome lights. The same happens when I turn on the "cargo" light outside, over the bed of the truck. I understand that they should shut off when left on for a long time to conserve the batter, but 5 seconds is annoying. Are they controlled by some relay or is it something that is programmed in the computer?

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  • jnewitt Jun 25, 2009

    Thanks. Can you give me an idea where to find the module, what it looks like, & how to test it?

  • jnewitt Jun 27, 2009

    Ok, I disconnected the battery for about 20 mins while working on the
    engine. After hooking it back up, the problem seems to be solved. Go
    figure.

  • yadayada
    yadayada May 11, 2010

    THEY ARE CONTROLLED BY THE DELAYED EXIT MODULE, REPLACE/TEST IT.

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  • 109 Answers

I believe they are controlled by the BCM so that may be why they are shutting down too soon!!
either that or maybe your battery voltage is low, and when that happens the BCM or ECM will auto shut them off to conserve the battery!!
so go get your battery tested first!!!

Posted on Jun 26, 2009

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Can't get dome lights on when door is opener even with override switch off?


The following lamps may be manually turned ON by placing the interior lamp switch in the ON position, or by opening a door while the switch is in the AUTO position.
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The dome lamp


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The liftgate lamps


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Courtesy/map lights

The courtesy lamp supply voltage circuit of the body control module (BCM) supplies battery positive voltage to the dome lamp, the liftgate lamps, 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 with the switch in the AUTO position. The interior lamps receive a ground at G401 with the switch in the ON position.
Important: If the liftgate is opened after all the modules go to sleep, the dome light will not come on. The liftgate ajar switch input to the BCM will not wake up the BCM once it has gone to sleep, so the dome light will not come on. Once the BCM gets an input to wake it up, from remote keyless entry (RKE) or a door handle, the dome light will turn on when the liftgate is opened.
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 turn OFF immediately if the ignition switch is turned to the ON position or approximately 20 seconds after all doors are closed.
The courtesy lamps are controlled by the body control module (BCM). Inputs from the dome lamp switch and the door ajar switches are monitored by the BCM. When a door ajar switch is closed, or the dome lamp switch is turned to the ON position, the BCM supplies the B+ for the courtesy lamps.
With out a factory Tech2 scan tool or equivalent an knowing how these systems work ,you best bet is to take your vehicle to the dealer or some other ASE certified repair shop !

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