Question about 2004 Cadillac Deville

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Cadillac Deville Electrical problem

Hi I'm desperate. I own a 2004 Cadillac Deville and I'm having problems. Here you go:

The interior lights (map lights) won't come on when the doors are open.

The lower door lights (puddle lights) don't turn on ever.

The interior lights will dim if I use the control knob but it won't turn on the map lights. I can turn the map lights manually using each switch.

When I unlock my doors via the remote, the headlights and tail light light up. As soon as I open a door, all the lights turn off. Then, I have to get into a pitch dark car since only the door lights ( power window & heated/cooled seats light) work.

I'm getting real desperate. I can't bring the car to the dealer since money is real tight. PLEASE help me if you can.

Thanks you very much.

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  • 5 more comments 
  • acsuppa Mar 12, 2009

    Thanks for the reply. I checked the fuses and they all seem good. I read somewhere to check the door switches but I'm thinking there good because if I open a door, my radio will turn off ( when I'm inide the car and I turn off the car) and the headlights turn off when I use my remote to open the doors in the dark.

  • acsuppa Mar 15, 2009

    I double checked the fuses and a relay yesterday and there good. Again, I'm asumming the door swithes are good. I don't know what to do!

  • Anonymous Mar 22, 2009

    My security system seems to drain the battery of my 2004 Deville. Everything else runs ok but this only happens when I don't turn off the security system with the key after locking the door. What should I do?

  • fge00 Mar 22, 2009

    My security system is draining my battery. If I don't lock the car and then turn off the system I come out in the morning and the battery is drained. What can I do?

  • stoichiometr May 24, 2009

    No intior lights come on when opening the doors. the door switches must be working b/c the driver side controll buttons in the door light up and the car dings when the key is in and the door is open. I have checked the fuse 17 and relay #51 and it clicks after opening the door.

    Checking the pudel lights i find that both wiers have power all the time. rotating the dimmer switch to the on postoin does nothing. i am expecting the gray/ black stripe wier to have a switched ground controlled by a relay.

    Checking the # 51 relay scoket i find that i have 1 ground leg and 3 power legs i am guesing that the second ground is controlled by another relay or another controller.

  • Anonymous Mar 25, 2014

    "Map" lights or "Reading" lights come on when car is unlocked as well as when any door is open, also operational when using the dimmer switch on dash. They will not work when trying to turn on manually with the push button switch next to the light, issue is only with the lights for driver and passenger "map" lights.

  • Anonymous Mar 25, 2014

    2007 Cadillac DTS "map" lights or "reading" lights come on with doors open and with dimmer switch on dash. They will not work when using the push button switch near the lights, problem is isolated to the driver and passenger "map" lights.



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You could try checking the fuses to see if any are blown, if the fuses are all good then it's possible the door switch is bad or not making a connection from dirt or debris, the door switch is generally located insdie the door at the hinge or its a push button switch, when the door closes it pushes the switch in, the switch may also be jammed in keeping your lights from turning on.

Posted on Mar 11, 2009


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Hi there:
Are you confirm that the fuses are burned? This is located on the rear fuse block is located under the rear seat on the driver's side. The rear seat cushion must be removed to access the rear fuse block. Position 17 for Interior Lamps.

To access the fuse block, push in the two tabs located at each end of the fuse block cover. Then lift the cover off.

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Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

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