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1998 beetle installing new radio but yellow and red wires always hot even with ignition off

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I believe you are supposed to disconnect the negative on your battery, but only if you have a memory saver plugged into your cigarette lighter as to not lose any vital computer settings. then replace your stereo and plug the negative back on to your battery and remove the memory saver.
I've been researching about replacing the stereo because mine has fallen apart and i've just ordered a new one plus the ipod connecting kit.

Posted on Mar 12, 2009

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1 Answer

Which is the live wire out of thered black or yellow


red is switched or ignition, yellow is constant (always hot) and black is ground. Both the red and yellow have to be hot for the radio to work.

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Hi, your factory Sunfire wire colors are pasted below. The yellow wire should be accessory. This should connect to the stereo's red power wire. The orange "always hot" wire should connect to the stereo yellow wire--this is only used to keep your station presets in memory. Please let me know if you have more questions, and thanks for using FixYa.

2004 Pontiac Sunfire Car Stereo Wiring Diagram
Car Radio Battery Constant 12v+ Wire: Orange
Car Radio Accessory Switched 12v+ Wire: Yellow
Car Radio Ground Wire: Black
Car Radio Illumination Wire: Gray
Car Stereo Dimmer Wire: Brown
Car Stereo Antenna Trigger Wire: Pink
Car Stereo Amp Trigger Wire: Pink
Car Stereo Amplifier Location: N/A
Car Audio Front Speakers Size: N/A
Car Audio Front Speakers Location: N/A
Left Front Speaker Positive Wire (+): Tan
Left Front Speaker Negative Wire (-): Gray
Right Front Speaker Positive Wire (+): Light Green
Right Front Speaker Negative Wire (-): Dark Green
Car Audio Rear Speakers Size: N/A
Car Audio Rear Speakers Location: N/A
Left Rear Speaker Positive Wire (+): Brown
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Apr 04, 2011 | 2004 Pontiac Sunfire

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I have installed a new car radio and when the ignition is turned off the radio stays on. I have to manually switch it off and then it looses all of the preset radio stations. The radio instruction books...


Sounds as if you have power wire hooked up wrong. Should be 2 power wires. Probably a red one witch should be connected to Ignition on only power source, This your main power. Should have a yellow wire, which is memory backup which should be connected a constant power source In othe words hot all the time even with ignition off. You can use a test light to test power points.

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Just installed jvc kd-s16 and it loses power after 5 seconds. Used proper wiring harness and installed in 1996 f150


Connect Yellow to Battery (always 12V), red to ignition, and black to ground. Disconnect all others. Check it. If the radio stays on and plays CD, then radio is good. You may check other wiring

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I am trying to install a after market cd player and i need to know what all the wires from the car radio go to. thank you


1998 Hyundai Elantra Car Stereo Radio Wiring Diagram
Car Radio Constant 12V+ Wire: Light Green
Car Radio Ignition Switched 12V+ Wire: Brown
Car Radio Ground Wire: Black
Car Stereo Illumination Wire: Dark Green/White
Car Stereo Dimmer Wire: Dark Green/Black
Car Stereo Antenna Trigger Wire: N/A
Car Stereo Amplifier Trigger Wire: N/A
Front Speakers Size: 5 1/4′
Front Speakers Location: Doors
Left Front Speaker Wire (+): Green/Red
Left Front Speaker Wire (-): Light Green/White
Right Front Speaker Wire (+): Red/Blue
Right Front Speaker Wire (-): Light Green/Black
Rear Speakers Size: 6′ x 9′
Rear Speakers Location: Rear Deck
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Right Rear Speaker Wire (+): Green
Right Rear Speaker Wire (-): Green/Blue

Please rate my help.

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I install a radio it dont keep a memory


Pull the radio back out. I bet you hooked up both power wires (red and orange or yellow) to the ignition on hot wire. Orange or yellow depending on the radio usualy goes to the ignition on hot wire and red to a constant hot wire. Check the radio wiring diagram or list. One of the power wires has to go to a full time power source. check the wires with a circuit tester with the key off till you find the constant hot wire (battery power)

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Kenwood KDC-W312S wont keep the saved channels after car restart


Check the yellow wire connection on your wiring harness... This is the wire that provides continuous power even when the ignition is off. This is how the radio remembers presets/time and such. Every time you turn off the car, the radio "resets" because you dont have the yellow wire connected to an ALWAYS HOT wire.

If you cannot find a hot wire, then you can run a wire from the yellow on the back of your radio directly to the positive terminal on your battery. Dont worry, it doesnt draw enough power to run your battery down.

Most cars have a cigarette lighter or power port somewhere that is always hot. You could always run the yellow wire off of one of these.

Just find a way to get the yellow wire on a hot wire and your stereo will remember the presets.

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I cant get power is my harness missing wires?


Yes, your red wire is for ignition, yellow wire is for battery and black is ground. The red ignition wire is for the radio to turn off and on with the ignition. The yellow is always hot, for memory.

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Rewiring an old pioneer stereo.the radio was installed where it powers without the ignition being on.the battery was draining. figured it had to be the radio. pulled radio. the red power(acc wire) was...


hello...if you are sure that the red wire is acc it should be connected to the acc connection of the ignitionkey.or maybe the lighter positive...and the other to the battery"always 13.8 v"...then the memory will function properly of the radio and you will not drain your battery...please tell me what happens...good luck ...Ron

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