Im trying to replace my radio with a new one , my dad said we need to know what each wire is so we need schematics to outline which wires will go with the radio's wires when we splice them. Any ideas?

 

Hello Kervin,
Your dad is wise. If you are replacing the factory radio then the car should still have its factory wire harness. Several companies make wiring adapters so you don't necessarily have to splice the factory wiring. You would only need to splice the adapter (clearly labeled) to the new radio wiring (also labeled) then plug the adapter into the factory harness.

If the wiring on your car has already been hacked up, you have a mess on your hands. But there is a thread named 'radio wiring' that has the factory color coding for all the wires.

 

can you link this thread? I cant find it : / And yesterday we already cut the wires , oh well the only thing i can do now is get the info for the wires and finish it finally.

 

No problem, the thread was started just the other day as a matter of fact. This was posted for a 94 but the color codes will still apply.
https://volvoforums.com/m_78680/tm.htm#78793

 

1991-93 Volvo 940 Series Stereo Information

Constant 12V+
Yellow

Switched 12V+
Red

Ground
Black

Illumination
Light Orange

Dimmer
n/a

Antenna
Left Rear

Front Speakers
5 1/4"Doors

Left Front (+)
Blue/Yellow

Left Front (-)
White

Right Front (+)
Gray/White

Right Front (-)
Gray

Rear Speakers
6" x 9"Rear Deck

Left Rear (+)
Yellow/Brown

Left Rear (-)
Yellow/Green

Right Rear (+)
Green/Brown

Right Rear (-)
Green

 

so far ive only been able to get the front right speaker to work . Im done for today so hopefully i can get the rest up tomm.

 

https://www.volvotechinfo.com/index....m.serviceparts

 

Make sure you get your speakers wired correctly. If not, you can blow them AND your head unit. If you can't figure out which wire is positive or negative, simply hook your speaker's wires to a nine volt battery, MOMENTARILY. When you have the positve from the battery connected to the positive on the speaker and the negative likewise, the speaker will push outward. If you have them backward the speaker will pull inward. I learned this back in the day when I was a roadie.