SOURCE: JVC car radio/cd player wont switch on
As a sanity check run a temporary wire directly from the battery positive to the radio. Twist the red and yellow wires together and connect it to the wire from the battery. If this works either your red or yellow wire connection under the dash or to the harness is not hot like you think. Yellow usually goes to a constant 12 volt source (to keep radio memory) and the red wire to 12volts when the ignition is on. In some radios this is reversed. The test I mentioned will determin if the problem is in the wiring or the radio.
SOURCE: JVC KD-R312 CD player keeps resetting itself
You are losing the permenant 12VDC on the Radio. This is the thick yellow wire from the radio loom, it has to be connected all the time to 12VDC.
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SOURCE: Hi I have just installed my now JVC KD-R616 and
The orange light to the light control is usually for the face/display dimmer. When the headlights are on it tells the display to dim so as not to be too bright while driving. It can go to just about any interior light that is on when the headlights are switched on. Ashtray light is usually the easiest. As for the continuity on the constant/memory wire. It has to be constant with the key off as if connected directly to the battery. Turn the key off and check for a blank accessory location in the fuse box with a test light. If hooked to that, be sure to install an in line fuse in an accessible location. The black wire may very well be the memory wire from the original radio.
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SOURCE: need to set clock on
To set the clock on the radio please go to the link below. Page 9 will tell you how.
http://resources.jvc.com/Resources/00/00/95/GET0211-001A.pdf
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