Question about 2002 Chevrolet Express

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When I turn off the ignition key the radio stayed on --retarted then shut off again same thing I then turned off the radio next day the battery was stone dead. I disconnect the battery recharged the battery when I hooked up the battery there was a rather large spark i then disconnect the cable and reconnected it no spark and battery has stayed charged I'm very cocerned I can not have a failure due to my wife being paralized

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  • Master
  • 1,297 Answers

Radio is controlled by the accessory delay relay which is supposed to stay on until the drivers door is opened

therefore, assuming the dome lights work correctly then you need to find out why the PCM does not notice the door opening and deactivate the relay

then of course there is the possibility that the accessory delay relay has failed and stuck closed which will not only keep the radio alive but also 6 of your computers which will easily kill the battery in a few hours

if you have some detailed electrical experience and a DVOM let me know and I'll give your some test to perform

but the easiest and most likely at this point will be to verify the dome light situation and then to replace the accessory delay relay


Keep me posted!
Sean


Posted on May 28, 2010

  • 1 more comment 
  • oldcarguy210 May 28, 2010

    Sean,



    Where will I find the accessory relay I now notice the radio staying on for differnt lengh of times so I feel you are right. I do have the interior lights on manual off due to them not always going off Is this relay a dealer only item if not are there differnt qualities? any suggessions?



    Thanks

  • Sean Reisdorf
    Sean Reisdorf May 28, 2010

    do you have the base radio or the upgrade radio



  • Sean Reisdorf
    Sean Reisdorf May 28, 2010

    started digging a little further and found this might be a lot more difficult then just a relay

    in addition to knowing what radio you have, plus any stock video stuff I also need to know what other problems besides the dome light issue

    we might be dealing with a computer communication issue which is going to require the use of a professional scan tool to diagnose

    I looked up TSB's (Technical Service Bulletins) from GM for your vehicle but found nothing specific yet


    Sean


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