Results 1 to 6 of 6

Thread: HU wiring alternative?

  1. #1
    Join Date
    May 2007

    HU wiring alternative?

    i have a 2006 audi a4. with a connects2 harness which is wired 2 my avic f900bt. while installing my aftermarket rearview camera my power and ground connections contacted. now i have no power to my HU. the HU is fine but the power to the HU is no longer a go. i replaced the fuse, relay and now believe the somewhere the wire is shorted. is there an alternative way to deliver power to the HU?

  2. #2
    Join Date
    May 2007
    p.s i have no ACC power for some reason.

  3. #3
    It ain't easy being a green moderator meddler's Avatar
    Join Date
    Aug 2002
    Steps out the front of Henson's workshop or Sydney
    Check all your fuses. If you have no ACC power, there will be another fuse that is blown.
    Never let the truth get in the way of a good story

  4. #4
    Admin. Linux loser.
    Auto Apps:loading...
    Bugbyte's Avatar
    Join Date
    Sep 2004
    Corning, NY
    Blog Entries
    +1 for blown fuse. Now, you say the HU is fine but you won't know that for sure until you can actually turn it on.

    We have a Honda Pilot that has two fuse boxes, one inside the car, the other in the engine compartment. Yours may be the same. If you cannot find the fuse, get a multimeter (you can find extremely inexpensive analog ones at Home Depot or Radio Shack but I prefer the digital ones). Google up a video on how to use a multimeter to measure DC voltage, then start at the HU, turn the ignition to the on/accessory position and check the pins in the wiring harness to see you have power. If not, the loss of power occurs upstream somewhere.

    Move to the fuse box and remove the radio fuse. Put one probe of the multimeter into one side of the fuse slot and ground the other probe. If you don't get any voltage, move the probe over to the other slot in the fuse box (I'm assuming you have the blade style fuses).

    If you don't get any voltage, the problem occurs before the fuse box. In my car, there are a set of fusible links that sit right on top of the car battery and look like shiny flat wires. You may have something similar or a set of fuses or even circuit breakers in the engine compartment. Check those.

    Keep moving upstream until you find voltage, then move back downstream until you don't have any voltage. The reason for the break will be in between.

    A wiring diagram for the radio circuit will be incredibly helpful. Hit one of the Audi forums and search for one or ask if anyone has one. I suspect this type of problem happens commonly and someone may be able to just tell you "there's a secondary fuse box located...wherever".
    Quote Originally Posted by ghettocruzer View Post
    I was gung ho on building a PC [until] just recently. However, between my new phone having internet and GPS and all...and this kit...Im starting to have trouble justfiying it haha.
    Want to:
    -Find out about the new iBug iPad install?
    -Find out about carPC's in just 5 minutes? View the Car PC 101 video

  5. #5
    MySQL Error MatrixPC's Avatar
    Join Date
    Sep 2003
    Beach City, Socal
    Blown fuse or worse case burn wire but less likely unless the fuse is rate higher than the wire.
    there is only 2 wires that supply power to the HU. One is constant and the other is ACC. Look at your car user manual or fuse panel to find correct fuse. What other thing in the car is not working other than the radio?
    2004 Matrix XR A7N8X-VM/400 AMD XP-M 2500+, DS-ATX
    89 Supra Turbo P3 600E@750/Abit BE6 II, Alpine M-BUS Car2PC.
    Y2K Accord Dell GX150
    RoadRunner is the best FE PERIOD
    EmoRebellion is a SCAMMER

  6. #6
    MySQL Error soundman98's Avatar
    Join Date
    Jan 2008
    on the border of northern IL/IN
    Quote Originally Posted by Bugbyte View Post
    +1 for blown fuse. Now, you say the HU is fine but you won't know that for sure until you can actually turn it on.

    We have a Honda Pilot that has two fuse boxes, one inside the car, the other in the engine compartment. Yours may be the same.

    my eclipse has this-- i did something very similar, but neglected to check the ones under the hood-- i ended up taking it to the dealership, and got charged waaaay too much to replace 2 10amp fuses under the hood..(though i got a really good laugh out if it, because i took my car to them missing most of the interior trim work, and i can only imagine the tech's thoughts as he walked up to it..)

Similar Threads

  1. help please!!! swapping cd-unit from stock HU
    By isvflorin in forum Car Audio
    Replies: 5
    Last Post: 04-11-2007, 08:32 PM
  2. Replies: 8
    Last Post: 02-14-2006, 07:43 PM
  3. if you designed a vehicle's interior and wiring, how would you do it?
    By stapan in forum General MP3Car Discussion
    Replies: 7
    Last Post: 12-26-2005, 02:56 PM
  4. Replies: 1
    Last Post: 09-06-2004, 01:52 AM
  5. Wiring into car stereo w/o HU
    By mp3jeep in forum General Hardware Discussion
    Replies: 6
    Last Post: 10-23-2003, 04:36 PM


Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts