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12v Accessory Power Fuse Tap

Discussion in 'E85 Z4 (2002-2008)' started by kippintranet, Jan 19, 2012.

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    kippintranet

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    I am installing a set of gauges (oil pressure, oil temp, and water temp) in my 2004 E85 Z. Each gauge draws about 2ma. There is no fuse #27 for fold-in mirrors (do not have the accessory). Using a fuse tap (see link below) and a circuit tester, I have determined that it is accessory hot (ignition must be on). Specifically, what I need. Will be using a 1.5a fuse to power the gauges.

    I have read a lot about the sensitivity of the onboard computer, and have experienced the lamp warning light when I did not use a 21watt turn signal replacement bulb.

    Has anyone used #27 to power an accessory (i.e. radar detector, satellite radio, etc.)? Any downside or potential problems? Thanks in advance.
    Cooper Bussmann/ATC fuse tap converts one into two fusible circuits - 10 Amps maximum on added circuit



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    Part Number: BP-HHA-RP
    • Member

    Satch SoSoCalifortified

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    Hmm. I like the idea! I need to find switched power for the Valentine One, so I await the response to your query!
    • Member

    kippintranet

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    I have had no problems tapping fuses for my cell phone and gauges. Attached is a map of "always on" versus "on with ignition." 2004 BMW Z4 (E85) Color Fuse Diagram.png

    2004 BMW Z4 (E85) Color Fuse Diagram.png
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    shipkiller

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    On both cars, I have done the same thing. On the MC, I run a Radar Detector, GPS and iPod. Now issues.

    The issue you had with a light bulb is not the same. The General Module and Lighting module (in combination) do 'bulb out' testing differently than how you would think it does.

    www.shipkiller.com
    • Member

    Satch SoSoCalifortified

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    Any notion of a switched 12-volt source in the rear-view mirror?

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