Have you removed the cars original radio, if so I had a similar problem. see my thread http://www.landyzone.co.uk/lz/f10/jvc-radio-range-rover-4-6-hse-p-reg-81928.html:)

Changed the position of the grey wire like you said, working fine now thanks.......

Thanks Peter, I will have another go with the radio sometime tomorrow, I will let you know the outcome!:)

My radio has been playing up over the last few weeks, Clarion type radio with cd multi changer. (Harman Kardon badges on speakers) I am trying to fit a JVC in its place, I have the grey power connection block from the RR to the JVC no problem and all power to the radio is fine. My problem is...