wiring woes! 2005 freightliner columbia

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Retta Ranch, May 31, 2010.

  1. Retta Ranch

    Retta Ranch Bobtail Member

    May 31, 2010
    bought a new cd radio for the truck, removed factory one, only to find out all the wiring is grey. anyone know which pin is what?
  2. Jolsen

    Jolsen Heavy Load Member

    Mar 6, 2010
    East of the big crick
    in mine all the wires were yellow. you can do one of the fallowing to hook it up.
    A: Buy a test light and find a hot and ground. (Little thing that looks like a screw driver with an ice pick point and a wire with alligator clip at the end of the handle.)
    B: Take a wild Guess and hope you are right.
    C: Buy or barrow a multimeter from a cb shop.
    In mine there was a plug that could hold 4 wires but was only using 2 wires. The one in the middle was the ground the one on the outer edge was the acc. I went with option B as I was sitting in a traffic jam and had a handful of spare fuses. But either way option A or C is your safest bet to do it right.

    If you go with option A
    Just make sure the key is on when trying to find the acc wire. The light should come on when hooked up right. Then when you turn the key off the light should go out.
  3. kwswan

    kwswan Heavy Load Member

    Jul 26, 2009
    you could also go to freightliner & get a wiring diagram. this will tell you what wire is hot,ground,speakers,etc.look on the top or bottom of the old radio there might be a diagram on there.freightliner might even have a harness you can hook to the new radio & will plug into the trk.
  4. Jolsen

    Jolsen Heavy Load Member

    Mar 6, 2010
    East of the big crick
    to find out which speakers are which take a 9 volt battery and tap the wires on them and it will make a sound cause it will force the speaker to flex out then back into as you tap it. or just have someone install it
  5. Transport Fool

    Transport Fool Bobtail Member

    Mar 7, 2009
    Each grey wire has some identifiers on it. It will say something like GRD (for ground) 95AL- and 95AL+ for rear speakers. 95FL- and 95FL+ for front speakers and so on.. xxxB is for power and xxxA is for ACC/Ignition. Try to match those up with your new cd player.
  6. Okieron

    Okieron Crusty Okie

    Dec 23, 2009
    muskogee, ok
    on the same subject is there a way to get to the antenna to plug in my sirius radio without removing radio?
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