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Whitch wire is the constant supply for the memory

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YELLOW for constant
RED for ignition/switched
BLUE for remote/power antenna

Posted on May 25, 2011


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2005 Mustang GT radio defaults

You are loosing power to the keep alive memory circuit of the radio. I think you may have a defective ignition starter switch. Also there are two hot wires to the radio, one powers the radio, one holds memory and is called the Keep Alive Memory constant power wire. Here is the wiring colors, pull the radio and check the memory power supply wire.
Radio Constant (keep alive memory) 12V+ Wire: Light Green/Purple wire

Oct 31, 2012 | Ford Cars & Trucks

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We have installed a Clarion system in a 1964 Chevelle. We followed the wiring instructions. Our problem is with the memory. We choose the stations and set them up in the select location buttons. They...

I will make this simple for you. The yellow wire needs to go to a power source that is constant. Check the wire with a meter or a test light to verify it is constant regardless of what position the key is in. If you have a weak battery that makes your car hard to start this will cause the radio to lose power while the engine is trying to crank while starting. So if you have verified the yellow wire has a constant power source and the red is switched, This isn't rocket science...if it works the problem is solved. If it loses memory again its your radio with the problem period. Unless you have an intermitant constant power on the yellow wire

Jun 12, 2011 | Clarion DRB2475

1 Answer

I hooked everything up but it only turns on constantly i cant get it to turn of with the rest off the car

you need to know which wire is your constant (+) supply and which is the switcheable (+) Connect the yellow wire from the deck to the constant + and the red from the deck to the switcheable + power as the red is you on off and the yellow is your memory. Sounds like you almost have it right-just need to find a switcheable power supply for the red .

Dec 11, 2010 | Pioneer AVHP3200BT Car Video Player

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Beeping and flashing light and battery icon, can not turn computer off with on off switch. What is causing this? Checked all plugins.

hi this problem cauld be a number of things you may have to elimonate .......... memory if you have 2 sticks of memory in take 1 out and try 1 at a time .... the beeping if constant is your hard drive whitch is dead..... have you tryed reinstalling windows xp or what ever windows you use may solv the problem......please reply

Nov 10, 2010 | HP Compaq d530 SFF PC Desktop

1 Answer

Memory wire for audio system


The memory wire is always the main battery supply wire or the wire which has a constant voltage supply even when the key is turned off.

This is usually the yellow wire.

Hope this helped.


Sep 05, 2010 | 1997 Nissan Pickup

1 Answer

Wot colour is the memory wire on my 206 stereo

Yellow should be your memory wire it needs constant power supply.

May 12, 2010 | JVC KD-G120 CD Player

1 Answer

Radio looses memory when ignition switch is turned off

there are 2 power wires that supply stereos, one is to the ignition power {orange} and the other is constant power {red}, even though the radio works when the ignition is on the constant supply wire circuit is not functioning, check the fuses, alternativly, you will have to find the red wire from the back of the unit and trace where it is connected into, this supply to the red wire is faulty and may have to be re-routed to another supply. Good luck and safe driving

Jan 01, 2010 | 2004 Ford Ranger

1 Answer

Stereo problem

Sounds like the constant 12v supply is missing - blown fuse? or the wires are reversed. The constant is for memory functions, key-accessory for everything else.

Apr 21, 2009 | Car Audio & Video

1 Answer

Every time i turn my car off my radio memory erases.

Have you checked that the wire you are connecting to is constant 12 volts and not switched, and that any inline fuse is still good? Unless there is something wrong with the radio, the memory should work if you have the constant supply connected.

This site may be helpful with wire colors if your model car is listed.

Apr 19, 2009 | JVC KD-G120 CD Player

1 Answer

Loosing all ive saved when i turn the engine off

Easy fix, There are two 12+ volt feeds that should be connected to your unit.
1. Constant feed = 12+ volts that supplies power to the units memory all the time.This wire can be connected from the original radio connector wiring so long as it supplies constant 12+ volts, or be pulled from the battery, with an in-line fuse.
2. Switched feed = 12+ volts that only supplies power when the ignition switch is turned on,This wire can also be connected from the original radio connector wiring so long as it is a switched feed, also with an in-line fuse. 
During installation ether these wires were swapped or the constant feed (memory wire) was not connected.
Good luck...

Feb 24, 2009 | JVC KDAVX44 Car DVD Player

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