Question about Alpine MRP-M350 Car Audio Amplifier

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Light doesnt come on

Light does not come on checked all fuses and connection but nothing

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  • xstaticx Jan 31, 2009

    I have a similar problem. I have 11-12 volts running in my power wire (before the fuse and after the fuse) when I have the power connected to my amp.
    So there should be current running to the amp, but I don't get a blue light to signal on and it basically doesn't work.

    I have gotten some power to the amp by hooking up the ground and connecting the remote, but it only lasts 3 seconds before it fades away.

    What is the next step to troubleshooting this?


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  • Master
  • 631 Answers

With your multimeter set to DC volts, the black meter lead on the ground terminal of the amp (not on the point where the ground wire connected to the vehicle) and the head unit on (so the amp will have remote voltage applied), touch the red lead alternately to the B+ and remote terminals of the amp. If the voltage is below ~11 volts, you need to check the wiring feeding whichever line is too low.

Let me know if you have any other questions.

Posted on Aug 26, 2008

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Posted on Jan 02, 2017

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