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Fitting a jvc head unit to a 1990 telstar tx5 does the yellow wire from car connect to yellow from jvc and does red access. wire from car connect to red from jvc. because have tried this nothing happening unless i connect red and yellow together from jvc and red and yellow from car.appreciate any help cheers.

Posted by ck_booth1 on


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Get a voltmeter(multimeter) and check the voltage on the

red wire
yellow wire
(from the car)
when the car is turned off and when the car is on

one should be 0V when the car is off
and both should be 12V when the car is on

then you need to match that up with the radio using the manual

but im guessing that you dont have a manual so...
i want ot confirm that
when you connect red to red and yellow to yellow
nothing happens

try the oposite way

red to yellow yelolow to red

Posted on May 29, 2010


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I’m happy to assist further over the phone at

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