avh-p4900dvd will not power up

Discussion in 'DVD Navigation, Video and Mobile Media' started by coloneludatank, Oct 3, 2010.

  1. coloneludatank

    coloneludatank New Member

    I have a avh-4900dvd that I was trying to install in my 04 silverado and it will not power up at all I know the fuse is good in the vehicle because the factory radio works fine and I only connected the Red (Power), Black (Ground), and Orange (Illumination )and I am not getting anything at all. Am I doing something wrong? if so may you please assist me?

    black====> black
    red=====> red
    Orange==> orange
  2. ericj

    ericj Full Member

    There should be a yellow wire you need to hook up for the switched power.
  3. coloneludatank

    coloneludatank New Member

    I have that yellow====>yellow which is the 12v constant and I am not getting anything out of it at all.
  4. Klinkster

    Klinkster Full Member

    "getting anything out of it at all"

    You have no power from the yellow circuit? Trace where the yellow is tapped into and see if the fuse is blown. You could always run a new wire directly to the battery as long as you use an inline fuse.
  5. ericj

    ericj Full Member

    Try grounding your HU somewhere else besides using the black harness wire. You can also just connect the red & yellow wires to see if your HU will turn on that way. If it does, figure out which 12V wire is problematic.
  6. TE5LA

    TE5LA Guest

    A 2004 Silverado has a Class 2 Databus system. If you disconnect to stock radio, you can't get 12-volts on the accessory wire. The vehicle computer communicates with the stock head unit and only turns on the ACC if it sees it.

    You have to get the proper Class 2 Databus adapter to have the accessory (and other vehicle functions) operate properly. Without it, you need to run a new accessory, but you will loose the RAP function and possibly the air bag.

    The proper adapter is about $99.
    Last edited by a moderator: Oct 14, 2010