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Thread: Running stereo off aux battery

  1. 5th December 2023, 01:13 PM #1
    Triplezed3
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    Running stereo off aux battery

    Hi all,

    I want to run the stereo to power off my aux battery. Has anyone redirected theirs or know how to do it? If yes, some instructions would be very helpful.
    2006 Discovery 3 SE TDV6 2.7L (Tourer)
    1992 Defender 1992 200TDi (Restoration project)

    2012 Defender MY90 (gone)
    2000 Discovery 2 SE V8 4.0L (gone)

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  2. 5th December 2023, 01:47 PM #2
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    veebs
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    Quote Originally Posted by Triplezed3 View Post
    Hi all,

    I want to run the stereo to power off my aux battery. Has anyone redirected theirs or know how to do it? If yes, some instructions would be very helpful.
    I dare say that is way more complex than it should be - depending on the spec level, the head unit, the amp, the fibre interconnect thing, steering controls etc etc all have different power offtakes. On top of that, you will probably still be limited by the auto-off timer in the unit?

    What dual battery system are you running? If you have a traxide, you effectively are running of the aux battery already for a percentage of the power draw?

    At the risk of giving the answer to a different question, if you're looking for some music whilst the car if off, a bluetooth speaker paired to your phone may give a lot more bang for buck?
    2010 TDV6 3.0L Discovery 4 SE remapped to RRS output, Alaska White, GME XRS-330c, IIDTool BT, Dual Battery, Apple CarPlay, OEM Retrofitted: Cornering lights, Door card lights, Power + Heated Seats, Logic 7 audio
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  3. 5th December 2023, 01:53 PM #3
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    Tombie
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    Long story short - almost impossible.

    If you’d like some music when parked up, would recommend grab a “Boom” or equivalent BT speaker.

    As per other replies, you would need to intercept power feeds to MOST, Amp, BT module and all the screen and controls which will need to be talking on CAN and MOST to even function.

    And then, depending on the spec system you have - pulling 600+ watts (or higher) will quickly pull down even the largest of batteries within a few hours.
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