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Thread: Current Problems?

  1. #1
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    Current Problems?

    I have a road trip this Friday, so if anyone can help me that'd be great. Here is the scoop:

    I have a mac mini powered off a cartenix P1900. I have the P5V powering my Nüvi, and a USB hub. Directly off my battery is my amp (a 400W two channel, cheapest I could find), and an igo charge. The iGo Charger has a toggle switch. Another toggle switch is hooked up to the 12v+ ignition line that feeds the amp and cartenix. The cartenix provides power to my LCD, and to my mini. Here is the issue- everything works until I hit the power button on my mini. As soon as this happens, the voltage drops significantly enough to trigger the P1900's auto shut off, and everything dies. The mac's LED lights up, and sometimes stays on, but the hard drive never spins up, just kinda makes a high pitch noise for about half of a second.

    Here is the real kicker, and the part that has me most confused... the lights for my gears and a/c and heat haven't worked since I hooked up my carputer. But they flash on when the mac mini tries to start up and the voltage drops...

    My next two steps are to 1- Test the mini inside (its going to take some time to rebuild the brick) and 2- check my fusible links. (i've already checked the fuses.

    I'll update you guys as I test things, any help would be great!

  2. #2
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    It lives!

    The Mini is fine using the brick. The fault is not with it.

  3. #3
    Fusion Brain Creator 2k1Toaster's Avatar
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    Wait wait... you have the carnetix hooked up to the 12v ignition line that powers your mini? Meaning the power source is the itty bitty ignition wire under your dash? That is bad. And the lights not working support you have overloaded some circuits.

    PC's always get their own line from the battery, that is a rule.
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  4. #4
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    Kinda...

    No sorry, the PC is hooked up to the incoming 12v+ that used to power the radio. The ignition 12v+ is tied in to the switch line of the cartenix, like its supposed to.

  5. #5
    Fusion Brain Creator 2k1Toaster's Avatar
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    Quote Originally Posted by lxmorj View Post
    No sorry, the PC is hooked up to the incoming 12v+ that used to power the radio. The ignition 12v+ is tied in to the switch line of the cartenix, like its supposed to.
    Power the radio? The stock wiring? Again that is rarely a big enough wire to carry both the screen and PC.

    Screen only, sure. Both, no.
    Fusion Brain Version 6 Released!
    1.9in x 2.9in -- 47mm x 73mm
    30 Digital Outputs -- Directly drive a relay
    15 Analogue Inputs -- Read sensors like temperature, light, distance, acceleration, and more
    Buy now in the MP3Car.com Store

  6. #6
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    Firewall

    Okay, I need the wiring from the battery to power the following: a dual iGo cell phone charger, my amp which powers stock speakers in my 2009 Nissan Versa, and my cartenix. The cartenix supplies a 7 inch lilliput, a mac mini, a garmin nuvi, and a usb hub. How thick wire should I run from the battery terminal, and how should I get it from the engine compartment to inside my dash?

  7. #7
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    Bugbyte's Avatar
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    Check out that FAQ link at the top of the page for questions about wire gauge, although I'll help you out and say that if you are powering your amp and your Mini and chargers and screen, I'd use 4 gauge and a distribution block.

    DON'T run that kind of power through a toggle switch unless you know is rated at 12 volts and 20 amps or better.

    You need fuses, too. Watch the video in my signature to see how to wire up a Mini and Carnetix unit and run it through the dashboard.
    Quote Originally Posted by ghettocruzer View Post
    I was gung ho on building a PC [until] just recently. However, between my new phone having internet and GPS and all...and this kit...Im starting to have trouble justfiying it haha.
    Want to:
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  8. #8
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    Done

    It works!!! Just in time for my 6 hour drive!! Thanks for all your help. In the end, I just took everything back to stock, had them fix it under warranty, and then did it properly. Drilling through the car was friggen scary though.

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