Question about Pioneer DEH-P4500MP CD Player

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Power problem? when playing the stereo,if it is turned low,it plays fine,but the more you increase the volume,the unit starts flashing dim with the music and then shuts off,then it will come back on ,then repeat it till you turn volume back down.?

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???

1. Is the head unit powering the speakers directly or through an amp?
2. What ohm load (4,8,) per channel and how many speakers?
3. Does it do it with the bass set all the way down?

If you have access to a voltmeter see what the voltage is on the yellow and black wires when it is diming. It should be stable ~ 13.5v with car on. if its < 10v when dimming either there is:

1. Shorted speaker lead.
2. Bad ground to radio.
3. loose power feed to radio.
4. Ohm load below 4 ohms, causing the eccess current draw.

Posted on Nov 12, 2009

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