Question about JVC Car Audio & Video

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I have just fitted a JVC KD-R711 to my 1973 MGB Roadster. As there is no custom wiring harness I have connected the 12v battery feed to the yellow lead in the power cord and the earth to the black lead in the power cord. The unit will not switch on however the display lights up for a few seconds when the ignition is turned on with a timer showing and then goes off. If I press the eject button "eject" comes up in the display for a few seconds and then goes off. If I press "reset" it has no effect. I have tried swapping the red and yellow wires and then the unit is completely dead and pressing "reset" has no effect. Halfords have tested the unit and it works as I would expect it. Any suggestions welcome.

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  • Joe Lumsden Jan 02, 2011

    Hi Dan

    Thanks for your answer. Just a point of clarification please.

    So far I have been using a fused ignition live connected to the yellow lead.

    I can connect the yellow (12v) to the red (accessory) but then how can the yellow be ignition live and the red constant live or vice versa as they are now connected together?



  • Joe Lumsden Jan 02, 2011

    Hi Dan

    Yes that's it - it works. Thanks.

    Now that you have put me on the right path and reading the instructions again I think the red will be the ignition switched supply and yellow the constant.

    How a manufacturer can describe a required feed as "accessory terminal" (the red lead) is beyond me.

    Happy new year to you and kind regards




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If you connect the red and yellow together then attach them it should work, use an inline fuse if it has not already got one, the yellow should be ignition live and the red constant live although on JVC I have seen them the other way around also.

Hope this helps


Posted on Jan 01, 2011

  • Dan Doherty
    Dan Doherty Jan 02, 2011

    Hi Joe

    I meant puerly to test, if you put both the red and wire toghether then if the unit works as it should. try it and get back to me.

  • Dan Doherty
    Dan Doherty Jan 02, 2011

    Hi Joe
    yes this is what I was saying about JVC don't know why but some are vice versa, I think possibly because some are foreign imports intended for other markets. Happ new year hope it is an enjoyable one. Nice car by the way




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