Door locks

2002 CHEVROLET MONTE CARLO
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MR_STOGEE
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Six cylinder front wheel drive automatic 160,000 miles.

My door locks switches no longer work to lock or unlock from inside the car or via alarm remote. I noticed when all the lights are on neither of the lock buttons are lit up like the other lights (window switches). You can still manually lock and unlock via door panel just not using the switches on the panel. Something else odd, when I used my remote to unlock my truck it would no longer open either. Could this be connected as well?
Sep 2, 2009 at 8:43 PM
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JDL
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Did you check the door lock fuse 20 amp? left instrument panel fuse box, use a test light that fuse circuit should be hot all the time.
Sep 3, 2009 at 12:48 PM
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MR_STOGEE
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Thanks. I did check the fuse, checked okay. I then checked with a test light, good also. Might I add that the truck also will not open from interior panel only manually by key. All three were connected to the alarm remote, door locks and trunk, now none will light up on interior panels, open from the interior switches or remote.
Sep 3, 2009 at 2:56 PM
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JDL
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Okay, did you check dic/rke fuse 10 amp, right instrument fuse panel. My fault, i should have mentioned that fuse earlier, use a test light on that circuit as well. There is a remote control door lock receiver also. I have not looked at your theft system. Is the remote battery okay?
Sep 3, 2009 at 3:49 PM
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MR_STOGEE
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checked dic/rke fuse 10 amp, okay. Checked with test light, okay. Remote battery is also new. Have aftermarket radio in there so do not use anti theft via radio. Alarm is Viper with blue remote, not sure what model.
Sep 3, 2009 at 5:14 PM
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JDL
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I would check the remote door lock receiver, middle upper dash. I do not know how easy that is to get at? It might be quicker to check the body codes. I am just tracking the wiring circuit. Next inline is the BCM.
Sep 4, 2009 at 8:33 AM
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MR_STOGEE
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Okay, this about where my knowledge stops, lol. By body codes do you mean figuring out the VIN decoded? I am assuming that I might have to take apart my dash to get to this receiver? That seems maybe more than I might be able to do, please advise.

Thanks
Sep 4, 2009 at 9:15 PM
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JDL
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I am talking about trouble codes. A B type code may give more information. A good scanner will read manufacturer specific codes as well as generic.

I have not looked at a removal procedure for that receiver.
Sep 4, 2009 at 9:56 PM
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MR_STOGEE
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That was my second guess! Okay although I know something still has to be wrong, everything just started working Saturday afternoon. After a long drive BAM! the locks clicked when I turned my car off and trunk works as well. Everything works from the alarm as well. I do have a mechanic that deals strictly with GM vehicles so I can pass by and have him read the codes. I really appreciate your help and will keep you posted after I have the codes read.

Thanks
Sep 8, 2009 at 10:30 AM