WHERE DO THE REAR SPEAKER WIRES TERMINATE IN THE FACTORY WIRING HARNESS OF A 2003 E25 VAN THAT DID NOT COME WITH FACTORY INSTALLED SPEAKERS IN THE REAR DOORS

2003 Kia Optima Car Radio Wiring Diagram

Car Radio Battery Constant 12v+ Wire: Orange
Car Radio Accessory Switched 12v+ Wire: Yellow
Car Radio Ground Wire: Black/White
Car Radio Illumination Wire: Brown/White
Car Stereo Dimmer Wire: Gray
Car Stereo Antenna Trigger Wire: Gray
Car Stereo Amp Trigger Wire: Green
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 (+): Yellow
Left Front Speaker Negative Wire (-): Black
Right Front Speaker Positive Wire (+): Blue
Right Front Speaker Negative Wire (-): Red
Car Audio Rear Speakers Size: N/A
Car Audio Rear Speakers Location: N/A
Left Rear Speaker Positive Wire (+): White
Left Rear Speaker Negative Wire (-): Brown
Right Rear Speaker Positive Wire (+): Orange
Right Rear Speaker Negative Wire (-): Green

Run them!

1995 Ford Explorer Car Stereo Wiring Diagram
Car Radio Constant 12v+ Wire: Green/Violet
Car Radio Switched 12v+ Wire: Yellow/Black
Car Radio Ground Wire: Black/Light Green
Car Radio Illumination Wire: Light Blue/Red
Car Stereo Dimmer Wire: N/A
Car Stereo Antenna Trigger: Orange/Blue
Car Stereo Amp Trigger Wire: Blue (If Equipped)
Car Stereo Amplifier Location: N/A
Front Speakers Size: N/A
Front Speakers Location: N/A
Left Front Speaker Positive Wire (+): Orange/Light Green
Left Front Speaker Negative Wire (-): Light Blue/White
Right Front Speaker Positive Wire (+): White/Light Green
Right Front Speaker Negative Wire (-): Dark Green/Orange
Rear Speakers Size: N/A
Rear Speakers Location: N/A
Left Rear Speaker Positive Wire (+): Gray/Light Blue
Left Rear Speaker Negative Wire (-): Tan/Yellow
Right Rear Speaker Positive Wire (+): Orange/Red
Right Rear Speaker Negative Wire (-): Brown/Pink

Alldatadiy.com should have the wiring diagram.

the orange wire in the #8 cavity is your key on power wire, so yes you need it the yellow wire in the #1 cavity is the 12 volt alwise wire so you need it as well the orange wire in the #10 cavity is the right rear speaker wire + you also need it hear is the wire list.

wire #1. yellow 12 power with key on

wire #2. gray interior lights

wire #3. green right rear speaker -

wire #4. red right front speaker +

wire #5 black left front speaker -

wire #6 brown left rear speaker -

wire #7 gray power antenna

wire #8 orange 12 volt power hot all times

wire #9 pink interior lights

wire #10 orange right front speaker +

wire#11 blue right front speaker + ( door )

wire #12 empty

wire #13 empty

wire #14 yellow left front speaker + (door)

wire #15 white left rear speaker +

wire #16 black/orange ground

Car Radio Battery Constant 12v+ Wire: Red/White
Car Radio Accessory Switched 12v+ Wire: Blue
Car Radio Ground Wire: Black/Gray
Left Front Speaker Positive Wire (+): White
Left Front Speaker Negative Wire (-): White/Brown
Right Front Speaker Positive Wire (+): White/Violet
Right Front Speaker Negative Wire (-): White/Orange
Left Rear Speaker Positive Wire (+): White/Green
Left Rear Speaker Negative Wire (-): Brown/Yellow
Right Rear Speaker Positive Wire (+): Brown/White
Right Rear Speaker Negative Wire (-): Brown/Blue

Radio Constant Wire 12V+: Red
Radio Ignition Switched Wire 12V+: Yellow
Radio Ground Wire: Black
Radio Illumination Wire: Pink/Black
Radio Dimmer Wire: n/a
Radio Antenna Trigger Wire: n/a
Factory Amplifier Turn On Wire: n/a
Left Front Speaker Wire (+): White
Left Front Speaker Wire (-): Brown
Right Front Speaker Wire (+): Black
Right Front Speaker Wire (-): Yellow
Left Rear Speaker Wire (+): Blue
Left Rear Speaker Wire (-): Red
Right Rear Speaker Wire (+): Green
Right Rear Speaker Wire (-): Orange

go to installer.com

Constant 12V+ Blue/Yellow
Switched 12V+ Gray
Ground Brown (or your own wire to a metal grounding point)
Illumination Green
Antenna Trigger Black/Red

Front Speakers 4" Dash
Left Front (+) Pink
Left Front (-) Purple
Right Front (+) Green
Right Front (-) Blue

Rear Speakers 5 1/4" Rear Deck
Left Rear (+) Black
Left Rear (-) Yellow
Right Rear (+) Red
Right Rear (-) White

I a '83 camry, there are 2 seperate plugs that go into a factory radio.
One for Power/and front speakers, and the other for rear speakers.

Sounds as if you are missing part of the harness for the rear speakers (or it is shoved in the back of the dash unused by the previous install). If there is not an un-cut plug in the dash - your only course of action would be to run your own set of speaker wire to the rear.

See this picture... these are the plugs that should go into your factory radio....


Metra kit 71-1938 will go from your factory wiring directly into your factory radio.


Thanks for using FixYa - a FixYa rating is appreciated for my effort in answering this Freebie question.

2003 Chevrolet Silverado 1500 Car Radio Wiring Diagram
Car Radio Battery Constant 12v+ Wire: Orange
Car Radio Accessory Switched 12v+ Wire: The radio harness does not provide a switched power source. Run a wire to the fusebox for switched power.
Car Radio Ground Wire: Black/White
Car Radio Illumination Wire: Gray
Car Stereo Dimmer Wire: Brown
Car Stereo Antenna Trigger Wire: Pink
Car Stereo Amp Trigger Wire: N/A
Car Stereo Amplifier Location: Under the center console.
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
Left Rear Speaker Negative Wire (-): Yellow
Right Rear Speaker Positive Wire (+): Dark Blue
Right Rear Speaker Negative Wire (-): Light Blue
If that dosnt match with your vehicle try this tip, 1st always find your speaker wires first,Since this is the most tedious part, its better to get those out of the way, 2nd thing Disconnect the battery of the vehicle so you don't blow fuses for the head unit, 3rd, strip back all of the wires that are available to you. Its better to grab the all together and cut them all an equal length to make it neat. 4th
Once you have all your wires stripped back - Grab any single wire. Hold it against a terminal on the battery and one by one go through and tap every other wire against the other terminal of the battery until you hear a "pop". When you hear a speaker popping, you have correctly identified the wires that run directly to it. If on the first attempt at popping a speaker you don't find one, pick up another wire and repeat the process. They will eventually come, and the more you identify, the fewer wires you have to mess with, You will need these Items,You'll need some wire strippers, a digital multimeter, electrical tape,9 volt battery