Question about Mazda Millenia

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1999 Mazda Millenia: What is the best way to install an amplifier in to a 1999 Mazda Millenia? eg, how do I get the 4 gauge wire from the battery to underneath the dash?

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  • scottgiles Nov 11, 2010

    Thanks Jason,

    Do you have any ideas as to where the main engine wiring harness can be located? Before you posted, I've been looking for this thing for hours and still have not yet found it. Any ideas?


  • scottgiles Nov 12, 2010




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The best way to do this job is to look for the main engine wiring harness which goes through the firewall, then where you see the rubber grommet pass the wiring through there. Its safe and won't rub against any metal. Then just feed it through until it comes out in the inside where you can feed it through to the amplifier. If you can mount the amplifier under the front passengers seat or rear seat if there is room. Route the wiring under the floor carpet. Yes you will need to remove the front seats etc to do this but it is the best way to install things like this and it is much safer.
Good luck with it and let me know if you need more information.

Posted on Nov 11, 2010

  • Jason Maurirere
    Jason Maurirere Nov 11, 2010

    Yes, you will find 2 wiring looms one on left and right rear top corners of the firewall. Take the loom which your battery is on.
    See picture below.

  • Jason Maurirere
    Jason Maurirere Nov 11, 2010

    The 2 looms are the light grey areas running along each side of the engine bay.

    Hope this helps.



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