Need the color code for harness on the toyota 98

I found wiring diagram at 2000 Dodge Ram 1500 Stereo Wiring Diagram ' Dodge durango, Dodge dakota, Dodge ram 1500 (pinterest.com) and wiring color codes at 2000 Dodge Ram Pickup Car Stereo Wire Colors and Locations (the12volt.com) but I recommend to consult an auto electrician for authentic connections.

read (you meant main harness to radio sub harness.)
and car may have 5 or more harness for 5 or more very complex radio head end options new,so only the real service manual covers all that for sure,or if lucky 2nd fiddle here.

https://eautorepair.net/Marketing/Default.asp

Here is a diagram from AutoZone for the 1995 Avalon. Best I can do.

Here's a link on toyota stereo wiring.http://www.modifiedlife.com/car-stereo-radio-wiring-diagram-1998-toyota-camry/

Go buy a wiring harness from Car Toys. After you clip in the harness it is all color to color matching from there.

Theres a standard amongst most stereos, so if these colors apply, then you will be right,
Red is Ignition power
orange is direct power
Black is earth
blue is for phone
White is for electric arial
then there will be four coloured wires with matching color trace wires, these are the speaker wires.
Hope this gets you going, good luck.

Radio Constant 12V+ Wire: White/Green
Radio Switched 12V+ Wire: White/Red
Radio Ground Wire: Black
Radio Illumination Wire: n/a
Radio Dimmer Wire: Red/Black
Radio Antenna Trigger Wire: n/a
Radio Antenna Location: Rear Glass
Front Speakers Size and Location: 6 1/2′ Doors
Left Front Speaker Wire (+): Blue/Green
Left Front Speaker Wire (-): Gray/Black
Right Front Speaker Wire (+): Red/Green
Right Front Speaker Wire (-): Brown/Black
Rear Speakers Size and Location: 6′ x 9′ Rear Deck
Left Rear Speaker Wire (+): Blue/Yellow
Left Rear Speaker Wire (-): Gray/White
Right Rear Speaker Wire (+): Red/Yellow

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.

Constant 12V+                 Blue/Yellow  Switched 12V+                             Gray  Ground                                         Brown  Illumination +                                Green  Dimmer n/a  Antenna Trigger                             Black/Red  Antenna Driver's Pillar  Front Speakers                             3 1/2" Dash Left Front (+)                                 Pink  Left Front (-)                                  Purple  Right Front (+)                               Light Green  Right Front (-)                                Blue  Rear Speakers                               5 1/4" Rear Deck Left Rear (+)                                  Black  Left Rear (-)                                   Yellow  Right Rear (+)                                Red  Right Rear (-)                                 White 

Battery BLUE/WHITE (+) RADIO HARNESS
Accesory YELLOW/RED (+) RADIO HARNESS
Ground BLACK (-) RADIO HARNESS
Illumination RED/BLACK (+) RADIO HARNESS
Power Antenna YELLOW/WHITE (+) RADIO HARNESS
LF Speaker (+) BLUE/GREEN
LF Speaker (-) GRAY/BLACK
RF Speaker (+) RED/GREEN
RF Speaker (-) BROWN/BLACK
LR Speaker (+) BLUE/YELLOW
LR Speaker (-) GRAY/WHITE
RR Speaker (+) RED/YELLOW
RR Speaker (-) BROWN/WHITE
Steering Cntrls NO
Speed Cntrl NO
Radio Security YES