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Not to sure on the jvc's but it probably just has a parking break line that needs to see ground. if so just ground out that wire and you should be good to go. But check the manual for operation cause some screens require that line to be pulsed on off on before working. If this is the case same solution just ground out that wire but put a toggle switch in line so you can turn the switch on off on to allow it to work. As far as i know one of these two was works on just about every scren except for alpines which require a second line for foot break and the pioneer avic -n2 and d1 which shut down by gps

 
Not to sure on the jvc's but it probably just has a parking break line that needs to see ground. if so just ground out that wire and you should be good to go. But check the manual for operation cause some screens require that line to be pulsed on off on before working. If this is the case same solution just ground out that wire but put a toggle switch in line so you can turn the switch on off on to allow it to work. As far as i know one of these two was works on just about every scren except for alpines which require a second line for foot break and the pioneer avic -n2 and d1 which shut down by gps
I read the same thing somewhere. Give what he said a try.

 
I have a Sony XAV-7W in dash screen and that is what I had to do. Just ground the parking brake wire and it plays all the time.

I just have to watch for the police pulling up next to me at a red light at night so I won't get busted watching a movie while driving. You don't realize how bright the LCD screen is till it's night time! Have to be quick on the screen retract button!

//content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

//content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

 
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