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Strange Problem - Power 'cutting out' *WTF*

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    Strange Problem - Power 'cutting out' *WTF*

    1991 318is

    Audio Setup:
    Class D 1000W Memphis amp - powering Fi Q 12" Sub
    Class A/B 250W Orion Amp - powering two PPI-365cs components
    2 gauge amp power wire/ground wire
    Pioneer DEH-80prs deck, internal amp turned off

    When I'm driving I notice (fairly frequently, couple times on my hour commute to work) the head unit will "shut off" and I noticed the Anti-lock light light up on my instrument cluster for a second.

    When this happens it cuts out the bluetooth connection from my deck/phone and I have to manually reconnect. I also noticed the headlights, and even the interior lights, hazard button, defrost button, cluster lights, dim with the music, even when there isn't much bass.

    I upgraded all the engine grounds, chassis grounds, to 2GA wire and copper lugs with good clean connections.

    Is this a battery issue (exide from Advance Auto) or alternator? The alternator belt is sufficiently tight, so I was thinking possibly the alternator itself as it happens when driving. Not sure if I have a 70A, or 80A alternator but I saw a 90A alternator available. I'm going to upgrade the alternator power wire when I have a minute, but if I need to replace I'll definitely add a thicker wire when its all apart.
    1991 318is ---230K - DD
    1991 318i ---- 308K - retired

    Originally posted by RickSloan
    so if you didnt get it like that did you glue fuzzy oil to the entire thing?

    #2
    Replace those 30 year old fuses with new ones and the problem will probably go away.
    Owner - Bavarian Restoration
    BMW and European Electronics Repair and Restoration
    www.BavRest.com
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