My jvc KD-G152 car radio/cd player will not power up. both yellow and red feeds are live although the previous owner has taken both these feed wires from one permanant live wire behind the dash.Not sure if this is the problem but cant see why it should unless red wire need to be dead when using reset
black wire is correcltly earthed. system will not power up press the display or eject button and system lights up for about 3 seconds then goes dead again
Have carried out reset (on off button together with set button but again nothing)system is almost new but cant return under warranty so any suggetions would be most welcome
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.
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Swapping the red and yellow wires cannot possibly have any affect on the radio. Both wires need to see 12 volts for proper operation. If they are reversed, it would only simply fail to save the memory settings. You have other issues. You have probably lost power on the red wire.
I had this exact same problem - in my case caused by the wire that should provide a continuous feed so the unit can keep its settings actually being from the ignition switch, and the continuous feed wire being connected to the terminal that should be from the ignition switch! I had a red wire (continuous feed) and a yellow wire (ignition activated feed) feeding to the back of the unit, and all I did was to switch these over - both wires had their own connectors let into the wires a few inches from the unit so that switch over job was easy. Works as it should now, although i have a grazed knuckle as the wires leading to the plug at the back were a bit too short! Chris
is this a headunit you have just installed? if not then I am not sure, but if it is, try swapping the red and yellow wires over. One should have permanent live, the other should be switchable. (unless you want the headunit to stay on when the ignition is off, in which case put them both to a permenant live feed.) Hope this helps.
sounds like only the constant(yellow) wire has power. you need to make sure that the switched wire(red) has power as well. good way to trouble shoot, is to hook the red to the yellow to see if it powers up then, if so you know the radio is ok, you just need to find a better power source for the red wire. hope this helps.
Make sure the red wire is still connected or make sure the red wire
hasn't been severed. Also, check the fuses located in the engine
compartment. The red wire connects accessory terminal in the fuse
block. Also check the fuses in the cabin. This fuse box is typically
located on the driver's side, at knee level, next to the door panel,
and underneath the dashboard. As a last resort, the unit can be taken
to an authorized or factory service center.
I would suggest checking the accessory (red wire), the yellow is a constant feed from the battery, which will allow the clock to be displayed no matter what. The accessory wire is what is used to turn on the cd player. You may need to restrip the red wire and check the lead going to the red wire with a test light to make sure it is getting a voltage light.
Hi. your radio has 2 power wires. A red one and a yellow one (with most decks)
It sounds like your radio is getting only constant power but no "key on" power.
Check your radio with the key on you should have power on both the red and yellow wires. If you are missing power on one of the wires theres your problem. If you have power on both wires then there is something internally wrong with your radio...