Question about JVC KD-G421 CD Player

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KD-G421 in Vectra Envoy 99

I have recently installed a KD-G421 CD player into a my 1999 Vectra Envoy 1.6. It appears to work fine, cd's play and ipod connects. Only problem is when i switch it on, the date on the dashboard disappears and when the car is turned off, the player loses all of its settings. Is this a wiring issue? Please can someone help.

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Re: KD-G421 in Vectra Envoy 99

To stop the memory loss you need to swap the red and yellow wires around. (battery power and ignition power).

To stop the date loss, you need to cut the electrical ariel/remote blue wire.

Posted on Feb 29, 2008

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May 15, 2015 | JVC KD-G421 CD Player

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If you are using adapter, KS-PD100, it is possible that new iPods wont work with this older adapter, I would recommend to connect your iPhone via AUX on the front of the unit

Jul 30, 2014 | JVC KD-G421 CD Player

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Attached cd player worked fine with cd then next time turned unit on it only shows symbols on the display n does not work no buttons work can't turn off and can't eject disc any ideas?

Most CD players will have a very small hole you can fit a paper clip into and push it
in which releases the CD drive mechansim and starts opening the tray.
You may want to press the RESET button behind the faceplate first and see if rebooting
it will make it cooperate. If you dont have the detachable faceplate completely on
some of the symptons you describe could happen.

Mar 26, 2011 | JVC KD-G421 CD Player

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Hi my cd player wont work it just makes a clicking noise while display is saying play but radio works fine.

there might be a problem in the optical drive, you can try to see a technician to clean it or you may need to replace it for a new one

Feb 02, 2010 | JVC KD-G421 CD Player

1 Answer

Unable to set the clock on jvc kd g421 car stereo. Any suggestions?

Press and hold SEL until menu appears
Using the scan button (FWD/REV), select Clock H
Using the volume knob, set the value
Using the scan button (FWD/REV), select Clock M
Using the volume knob, set the value
Press SEL to save and exit

Jan 14, 2010 | JVC KD-G421 CD Player

2 Answers

JVC Daisy Chain

If your autochanger has an input as well as an output connector it will be possible. The iPod adapter would have to be plugged into the changer's input, and the changer's output cable would run to the KD-G421.

This manual here from JVC shows a diagram on the middle of page 1 where an i-Pod adapter (I'm assuming you have the KS-PD100) is connected daisy-chained with an XM tuner or a DLP unit. Although it doesn't explicitly say that it would work with a CD changer, I don't think it'll be a problem as long as you have an input on the changer.

Feb 22, 2008 | JVC KD-G421 CD Player

1 Answer

Jvc cd reciever model number kd-g421

Here you go mate.

£75.00 gets you a new face!


Jan 22, 2008 | JVC KD-G421 CD Player

5 Answers

CD,s will not play

Read the Manual on Page 2 or get it from:

Just make a reset with a pen or something else.
This should solve the problem.

Best regards


Dec 28, 2007 | JVC KD-G421 CD Player

3 Answers


Per manual, you can lock a cd in by pressing and holding the power and cd button for moer than 2 secondsthe cd cannot be ejected. if acd is inserted upside down, please -eject appears.

May 18, 2007 | JVC KD-SX770 CD Player

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