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Head unit problems

Discussion in 'Motors' started by milgo, 23 Jan 2006.

  1. milgo

    Hitman

    Joined: 21 Aug 2003

    Posts: 651

    Location: Essex

    A weird problem. Was wiring my head unit adaptor at the weekend. Wiring looked messy as you would expect but it had badly wired iso connectors. I plugged in my power plug and headunit turned on, lovely. After chopping off the connectors and soldering on a jvc adaptor and blanking off ends of old speaker cables etc I plugged in my head unit. Made a little noise as usualy but then wouldn't turn on. It performs functions that it does when turned off. Screen will display time if i press a button and eject works. But the power button just does nothing. So obviously it has a constant 12v and ground so what can the problem be? could it have anything to do with ignition wire? I did manage to cross the live and earth with the old wiring which obviously popped a fuse, but surely it can't have affected anything else? HU wasn't connected at the time so wouldn't have been damaged.
    I'd appreciate any ideas.
    Cheers.
    Dan
     
  2. xcessive

    Wise Guy

    Joined: 28 Jul 2003

    Posts: 1,548

    Location: kent

    I had a similar problem where the wiring between the ISO and the headunit was messy as hell.
    I bought a new headunit (was meaning to buy one as the other one was rubbish) and decided to spend a little extra (about a tenner) on an ISO adaptor so all of the wiring behind the headunit was tidy and so wouldnt cause any problems in the future.
     
  3. xcessive

    Wise Guy

    Joined: 28 Jul 2003

    Posts: 1,548

    Location: kent

    Headunit shouldnt be damaged because there is a fuse in the car for the headunit as well as another fuse in the back of the headunit.
     
  4. needmorespeed

    Mobster

    Joined: 18 Oct 2002

    Posts: 3,497

    Location: Harlow, Essex

    check the switched 12v feed that is the one that turns the headunit on
     
  5. milgo

    Hitman

    Joined: 21 Aug 2003

    Posts: 651

    Location: Essex

    Yeah the headunit must be fine. As needmorespeed mentioned I think its the ignition live. I just wired it up to a remaining wire but i found out earlier that wire is a speed sensor one for volume, lol. I will tap ignition off the cig lighter or just connect both to constant 12v.
    Thanks for the help :D