20 Most Recent JVC KD-G421 CD Player - Page 5 Questions & Answers

Hi, there is no exact settings for your sound sysytem. There could be many reasons for the distortion on the front door speakers. best to find an certified car sound installer who will check your installation quality, and tune up the entire system according to your music selection style. Cheers.

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The remote wire is usually blue. Make sure u do not use the blue for speakers. The remote wire should be in with the power wires.

Most car harnesses will correspond by Colour thus look out for an orange Colour from the pre-installed/ pre-selected wires.
Now the issue is, not all cars come with such wires pre-selected and installed ie bunched up with the Audio cluster, for such, you need to identify the wire yourself that connects to the light switch on your dash board and tap into it.

the accessory wire needs to work with the key turning. the battery wire connects to the battery. if you have a volt meter it can be very easy to find your wire connections in the fuse box. find the ignition fuse in the box set your meter to volts dc take your black lead to a chassis ground and the red lead to one side of the ignition fuse turn your key to accessory and see if you get 14 volts if you do get it thats your connection. if not try the other side of the fuse.

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Sounds like one or more of your speakers are grounded out or just bad. Did they all play fine before. Check your wiring to make sure it’s correct

Most likely, your engine might not be producing the correct amount of voltage to your stereo system. It's most likely being over worked, or even your CD player needs to be cleaned. If it's the latter, try a quick burst of air duster.

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YOU COULD TRY PLUG THE RADIO IN AND ABOUT THE YELLOW WIRE YOU PUSH A GROND WIRE INTO THE PIN HOLE AND RADIO SHOULD WORK WHEN SECURE PROPERLY

SEEM LIKE U GET DEFICTIVE HARNESS

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Control knob is going out try opening and spay with contact cleaner

check all your power connection if that does not work check fuse at back of radio may be blown

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need a new unit cd rerader in unit have a problem

push reset button on top left corner and hold for about ten second then and turn ingtion of an then try.