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    Thread: Anti-theft system control signal???

    1. Member NefariousVW's Avatar
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      04-08-2012 11:08 AM #1
      So I attempted to install the AVH-P4400 in my 02 jetta wagon using the metra 70-1784 I got from Enfig. His harness has the turn-on lead (blue) connected to connector III pin 5 (anti-theft system control signal). I noticed that pin is constant +12VDC. It's not the new radio is it's constantly hot even with the new radio unplug. I found this out because I used the blue wire for the parking brake bypass relay which I could hear clicking when connecting or disconnecting the blue lead from the relay. So my question is; Should that pin be a constant 12VDC? If so, why would the amp turn-on lead be connected to it?
      '11 Audi A6 Avant 3.0t
      '03 Golf TDI
      '02 Jetta Wagon VR6

    2. Member NefariousVW's Avatar
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      04-08-2012 11:10 AM #2
      Here's a pic of the plug/wire in question. Its the second red/wht wire.

      '11 Audi A6 Avant 3.0t
      '03 Golf TDI
      '02 Jetta Wagon VR6

    3. Member NefariousVW's Avatar
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      04-08-2012 11:13 AM #3
      I should also note that everything worked but 1.5hrs after install I tried to start the car and i got nothing but clicking relays and flickering cluster lights which is what caused me to double check my wiring and find the relay constantly energized. My guess is the energized relay drained the battery.
      Last edited by NefariousVW; 04-08-2012 at 11:24 AM.
      '11 Audi A6 Avant 3.0t
      '03 Golf TDI
      '02 Jetta Wagon VR6

    4. Member phukenvr6's Avatar
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      his> 14 Jetta 1.8T / hers> 12 Eos
      04-08-2012 11:38 AM #4
      U don't need the blue wires on the metra plug. U hook the relay brake bypass wire to the blue white wire coming from the pioneer harness.


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    5. Member NefariousVW's Avatar
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      04-08-2012 05:44 PM #5
      Quote Originally Posted by phukenvr6 View Post
      U don't need the blue wires on the metra plug. U hook the relay brake bypass wire to the blue white wire coming from the pioneer harness.


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      After digging through my Bentley manual and researching online I came to the same conclusion and clipped the wire. This is the exact harness I started with from Enfig. I don't know why he has the blue turn-on lead tied to pin5 of the black vw plug but clipping it didn't affect anything so that's how it will stay.
      '11 Audi A6 Avant 3.0t
      '03 Golf TDI
      '02 Jetta Wagon VR6

    6. Member NFrazier's Avatar
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      04-08-2012 05:50 PM #6
      The vast majority of VW's past 97 are not supposed to have the blue wires hooked up to anything in the harness (there is an exception but it is not worth mentioning here).

      To bypass the e-brake safety you use a relay as such:

      Terminals:
      85: Remote turn-on from the Pioneer.
      86: Ground.
      30: Ground.
      87: E-Brake wire to the Pioneer.
      12v Installation Services: Audio, Alarms/Remote Starts, OEM Integration, etc.
      -----------------------------------------------------------
      Pioneer, Kenwood, Hertz, Audison, Rockford Fosgate

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