Stereo wiring on mk4 golf r32? Fitted new stereo bit radio isn't working I Need to know what colour wire to connect to the power supply for the amplified ariel?

youd need the NPR heavy truck, FSM book page on radio wiring
buy book at any Isuzu heavy truck dealer.
we dont now what radio option cam on that NPR
nor what country , other countries use different radios.
so..... this is USA forum, and we dont have NPR books.

Regardless of colour coding, please follow the following instructions (require multimeter):


Note: Attach multimeter earth wire (black) to the vehicle body. Convenient places may be the metal ignition barrel, the vehicle's car arial plug, cigarette socket body etc.


1) Testing for voltage with key out of the ignition, locate the permanent positive wire. This will wire into the yellow wire on your new stereo. The yellow wire circuit powers the stereo's memory.


2) Testing for voltage again. This time you are testing for a wire which only offers power with the ignition turned on. This one will wire into the red wire on your new stereo, and will power the unit only with the ignition on.


3) Now you know which your vehicle's positive wires are you can now test for an earth wire. Switch the multimeter to the resistance setting. There is one setting which will allow a buzzer to sound once you find continuity. With the ignition off test each wire until you get a buzz and a low resistance reading. This should be your earth wire. Double check this with the ignition in the on position. It should remain the same. If it changes to a positive with the ignition on and with the vehicle's lights switched on, then this is the dimmer feed for the stereo's screen. If you unintentionally found the dimmer feed, then you can ignore this wire, and search again for a wire which only offers an earth.


Now you have your power and earth wires located and can wire these into your stereo before continuing.


4) Next you need to use the stereo's balance and fade controls to allow only one speaker output to work from the stereo. So let's start with Left Front speaker output only. turn the stereo volume to mid way so that you can hear when you have connected to the right speaker. bare the remaining wires on the car side and test combinations of the remaining wires until you find the front left speaker of the car. Wire your stereo's wires once you find the correct connections.


5) Repeat the above steps with all remaining wires, remembering to adjust your stereo's balance and fade controls to only allow one speaker output at a time, to ensure the only one possible channel to work and help you identify which of the car's wires power the speaker you have selected.


Before re-assembly of the dash panel, check that your stereo and all functions work properly, being sure to use your fade and balance controls again to test all speakers individually.


If you want to be extra careful and wire the vehicle's speakers positive and negative, according to your stereo's outputs, not that this makes much difference on standard stereo arrangements, then follow this next step:


Make sure you can see the speakers themselves and connect a 1.5 volt AA or AAA battery to the speaker wires. If the speaker's cone pushes forwards, then the wire you connected to the battery's + terminal is indeed the positive wire and should be wired as such. If the speaker does the reverse, then you have the wires the wrong way around. Do not repeat this test for extended periods as damage may be caused to the speaker circuit.


Tip: Always solder all connections and insulate well from each other. Stereo connections can corrode over time and are prone to movement behind the dash. Poor connections may cause faults and low quality sound.

2006 Ford Focus Car Stereo Wire Color Codes
Car Radio Battery Constant 12v+ Wire: Yellow/Green
Car Radio Accessory Switched 12v+ Wire: Orange/Black
Car Radio Ground Wire: Black/Green
Car Radio Illumination Wire: Orange/Black
Car Stereo Dimmer Wire: N/A
Car Stereo Antenna Trigger Wire: N/A
Car Stereo Amp Trigger Wire: N/A
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 (+): White/Black
Left Front Speaker Negative Wire (-): Gray/Black
Right Front Speaker Positive Wire (+): White/Red
Right Front Speaker Negative Wire (-): Gray/Red
Car Audio Rear Speakers Size: N/A
Car Audio Rear Speakers Location: N/A
Left Rear Speaker Positive Wire (+): White/Green
Left Rear Speaker Negative Wire (-): Gray/White
Right Rear Speaker Positive Wire (+): White
Right Rear Speaker Negative Wire (-): Gray


I’m happy to help further over the phone at https://www.6ya.com/expert/jeremy_69f3cc28d95bf514

This are the colours 1993 Ford Thunderbird Car Radio Wiring Diagram Car Radio Battery Constant 12v+ Wire: Green/Yellow Car Radio Accessory Switched 12v+ Wire: Yellow/Black Car Radio Ground Wire: Black/Light Green Car Radio Illumination Wire: Blue/Red Car Stereo Dimmer Wire: N/A Car Stereo Antenna Trigger Wire: Orange/Blue Car Stereo Amp Trigger Wire: N/A Car Stereo Amplifier Location: N/A Car Audio Front Speakers Size: 5′ x 7′ Car Audio Front Speakers Location: Doors Left Front Speaker Positive Wire (+): Orange/Green Left Front Speaker Negative Wire (-): Black/White Right Front Speaker Positive Wire (+): White/Green Right Front Speaker Negative Wire (-): Black/White Car Audio Rear Speakers Size: 5′ x 7′ Car Audio Rear Speakers Location: Side Panels Left Rear Speaker Positive Wire (+): Pink/Green Left Rear Speaker Negative Wire (-): Pink/Blue Right Rear Speaker Positive Wire (+): Pink/Blue Right Rear Speaker Negative Wire (-): Green/Orange

Here are the wiring colors but just before you connect it please make sure the colors match
1999 Daewoo Lanos Car Stereo Wiring Guide
Car Radio Battery Constant 12v+ Wire: Orange
Car Radio Accessory Switched 12v+ Wire: Yellow
Car Radio Ground Wire: Black
Car Radio Illumination Wire: Brown/White
Car Stereo Dimmer Wire: Dark Green
Car Stereo Antenna Trigger Wire: N/A
Car Stereo Amp Trigger Wire: N/A
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 (+): Brown/White
Left Front Speaker Negative Wire (-): Gray
Right Front Speaker Positive Wire (+): Brown/White
Right Front Speaker Negative Wire (-): Gray
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/Black
Right Rear Speaker Negative Wire (-): Yellow/Dark Green

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

older pioneers:

2 x green (1 with black tracer) left rear spkr (black= negative)
2 x white (1 with black tracer) left front speaker
2 x grey (1 with black tracer) right front speaker
2 x purple (1 with black tracer) right rear speaker

Lower connector
1 x red ignition (switched supply)
1 x blue antenna output power (may not be not used)
1 x yellow Illumination (radio button lighting)
1 x orange permanant Battery supply
1 x black vehicle GND

If still not working swap yellow and orange wires! will not cause damage

https://www.the12volt.com/installbay/stereodetail/2175.html

Hi,

Perhaps this may help.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards. Thank you for using FixYa.

i took mine off yesterday to fit an aftermarket mp3 stereo in my mark 5 & what a hassle!!
it basically clicks in place so carefully undo the clippings by inserting some scissors or a screwdriver under the plastic bit & peeling it back. that will reveal two screws which you can undo.
then you have to lift the top bit which contains the vents for the heating system & try and force the clips back with that. pretty tricky but just needs a bit of force.
once this is done there are four other screws that need to be undone & the whole system just slides out...
easy once you've done it but then the big problem starts...
the connections are all different so you need to get some new radio & cd connectors to adapt the aftermarket stereo with the cars standard wiring!!!