2003 V70 Radio wire labels

[nycdriver]

Hello everyone,

I wanted to replace my stock radio (HU-613) this weekend but ran into a wiring issue. The wires from the stock radio harness do not have any label and I'm if someone can help me identify them.

I saw the metra adapter for sale online, however, I prefer knowing which wires are which rather than blindly sticking an adapter onto it.

Attached are the pictures of the two harnesses.

[packetfire]

Here's the wires (my 2001 v70 should be exactly the same as your 2003, but note that these are my notes from a 2001 v70)

Green Connector (Connector A)
============================
Pin 1 - Fat red wire - Power from fuse 11C/16 (Fuse panel behind headlight switch, #16)
Pin 2 - Violet wire - Power from fuse 11C/15 (Fuse panel behind headlight switch, #15)
Pin 7 - White wire - Data bus
Pin 8 - Green Wire - Data bus
Pin 9 - Blu/White - Power to antenna amps
Pin 10 - Red/Gray - Plus lead to center dash speaker, if any (16/26)
Pin 11 - Gray - Minus lead to center dash speaker, if any (16/26)
Pin 12 - Fat Brown wire - Ground

Gray Connector (Connector B)
=========================
Pin 1 Gray/Red - Plus lead to Front Left Speakers (16/4)
Pin 2 Gray - Minus lead to Front Left Speakers (16/4)

Pin 5 Gray/Red - Plus lead to Front Right Speakers (16/3)
Pin 6 Gray - Minus lead to Front Right Speakers (16/3)

Pin 7 Gray/White - Plus lead to Rear Right Speakers (16/6)
Pin 8 Gray - Minus lead to Rear Right Speakers (16/6)

Pin 11 Gray/White - Plus lead to Rear Left Speakers (16/5)
Pin 12 Gray - Minus lead to Rear Left Speakers (16/5)

Looking into the pins of the connectors, Pin 1 at upper left, pin 7 at lower left, but look on the back, the pins are numbered where the wires enter the connector. "Up" is the surface with the clip.

Speaker Designations in Wiring Diagram
=================================
16/3 - FR
16/4 - FL
16/5 - RL
16/6 - RR
16/17 - Deck Left
16/18 - Deck Right
16/26 - Center Dash Spkr (if any)
16/57 - Left Far Rear Spkr (V70s)
16/58 - Right Far Rear Spkr (V70s)

Subwoofer wiring is connected to the rear speaker wires, if your car is fitted with a subwoofer, so the subwoofer crossover must be at the subwoofer, not up behind the dash.

You will face several problems:

Problem 1: You have no wire to tell the radio when your headlights are on, so the radio display can dim. You'll have to run one.

Problem 2: You have to feed 10 volts to the blue white wire to power the antenna amps, or you have to install an actual antenna.

See this thread for details on the "10 volts" issue:
http://www.volvo-forums.com/t15342-st-2 ... eption.htm

But I did not like the antennas and amps, and just unplugged the cable from the antenna amp associated with the rear window in the cargo bay roof behind the driver, and ran a simple wire as an antenna up through the roof (gasp! I drilled a HOLE!), and inside the driver's side load rail. Works far better than the amplified antennas in the window glass.

Problem 3: There is just no way to make the steering wheel buttons do much of anything without a lot of work. I installed a little remote control for my aftermarket AM/FM/HD/Bluetooth/CD/SD card radio, and wired the volume and up/down channel buttons to the buttons on the steering wheel buttons, but this was a real craft project, not for anyone but an electrical engineer, and I have to replace the battery every 6 months or so, working very near the airbag. Maybe let the buttons be. There are kits out there, but they do not seem to be compatible with Canbus cars.

Problem 4: The CEM will complain that it cannot find the AUM when you plug in VIDA, and there is no way to tell the CEM that the AUM is not ever coming home. So, ignore the error.

Problem 5: You will now have much better sound, and you will then feel the need for much better speakers, at which point you will find that all the speakers are RIVETED into place. You will drill them out, and buy self-tapping sheet metal screws, and wonder what the Volvo designers were thinking when they put "rivet" and "speaker" in the same sentence.