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Re: jvc car cd/radio
The radio was improperly installed; there are two 12V leads, one services the radio when on, the other, only the circuitry for the clock and presets.
Eventually, this shouldn't be needed if the manufacturers ever think about using a little bit of flash memory for the presets and a coin cell for the clock.
You didn't give any model number so researching the manual is impossible.
If you can find the model number, look for a user's (or installation) guide on line to find the wiring info.
a 6ya Technician can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US. click here to Talk to a Technician (only for users in the US for now) and get all the help you need. Goodluck!
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Toyota vehicles have a fuse in the kick for the amp and sometimes there is located under the hood ... This is the switch turn on for the amp ... And 1 of the fuses is most likely the memory or constant power. B sure to check all fuses ... I do not have AllData pulled up . If the fuses are all good the amp or radio may be bad ... Or both ... Be sure to check all the fuses ... Many times I get clients that say allthe fuses are good and it is still the first thing I check ..Usually is a fuse ..Good Luck
The yellow wire in the wiring harness of your head unit must be connected to a constant power source, a live terminal in the fuse block that is connected to the battery and not affected by the ignition switch. If you do not have your manual this may help: http://resources.jvc.com/Resources/00/00/95/GET0182-002A.pdf
your deck has two power sources a main for when your car is turned on so the radio kicks on and a remote which is always on keeping stations and clock powered passively so whoever installed it did it improperly or do to road wear and tear it was jossled lose and can simply tightened after pulling the deck out
A car radio needs two sources of power. A little bit of 12 volt all the time and more power when you want to hear the music. Also known as battery(all the time) and ignition (when the "power" is on). It might be a bad connection on battery power or it wasn't connected right. Battery power is needed to keep the presets and the clock setting.
To set individual presets:
1. tune to the station you want as a preset
2. hold down the number (ie "1") on the remote until the number blinks on the system
3. repeat for all other stations
press the number on the remote to tune to your preset
this is very similar to setting the presets on my car radio
tune into the station you want as normal. Then on the remote, press & hold the number key for the preset number you want. This will flash in the display to show you it's set. You can preset 30 FM & 15 AM stations.