Amp LED flashes on but right back off
This sounds like a problem with the power input to the amplifier; it's possible, but unlikely, that your CD player is causing it.
Before you can do any real troubleshooting, you need a voltmeter. When your CD player is turned on, you should get a voltmeter reading of around 12 volts at the amplifier's remote terminal and B+ (power) terminal.
If your main power wire doesn't show voltage, check for a loose or corroded connection at the battery or fuseholder, and try replacing the fuse (even if it looks okay). If there's no voltage on the remote wire, it may be pinched or shorted between the CD player and the amplifier, or the CD player may be faulty. If you get a good voltage reading on both wires, but the amp won't turn on, then you have a problem in the amplifier.
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