When I bought my VW Caddy the standard radio had been replaced with an aftermarket one. I have got a new VW radio but the wiring has been butchered. Where do I get a new harness?

You can buy an aftermarket radio harness adapter for your Navigator from ebay quite cheaply. I would not recommend butchering the factory wiring to install a replacement head unit. I found this one (will work as long as your Lincoln wasn't fitted with SATNAV) -
Lincoln Radio WIRE HARNESS INSTALL STEREO PLUG 2003 09 eBay

you can buy an adapter the plugs into the factory wiring and the new radio so you don`t cut and butcher the wiring of the car. it covers the wiring for the speakers as well. going by your photo this looks like a bad wiring and splice job.

have this done professionally because the electronics are balanced and if you pick the incorrect wires then the CPU goes crazy.

If someone else put in an aftermarket radio, they probably used their own speaker wires, and disconnected the factory wires from the speakers.

Hi, please check to see if your colors match the ones below. If yes, then connect them to the aftermarket colors shown next. Assuming your factory installation has only four speakers, there should not be a lot of wires left over.

1983 Cadillac De Ville Stereo Wiring, aftermarket stereo wire

Car Radio Battery Constant 12v+ Wire: Orange, yellow
Car Radio Accessory Switched 12v+ Wire: Yellow, red
Car Radio Ground Wire: Black, black
Car Radio Illumination Wire: Gray (tape off), none
Car Stereo Dimmer Wire: Brown (tape off), none
Car Stereo Antenna Trigger Wire: Pink, blue
Left Front Speaker Positive Wire (+): Tan, white
Left Front Speaker Negative Wire (-): Gray, white/black
Right Front Speaker Positive Wire (+): Light Green, gray
Right Front Speaker Negative Wire (-): Dark Green, gray/black
Left Rear Speaker Positive Wire (+): Brown, green
Left Rear Speaker Negative Wire (-): Yellow, green/black
Right Rear Speaker Positive Wire (+): Dark Blue, purple
Right Rear Speaker Negative Wire (-): Light Blue, purple/black

Hi, Pull/take off the outer bevel edging, pull at each side in the side area so you dont snap it. then get 4 mini screw drivers, if you don't have a stereo removing tool, put one in each of the 4 holes and then hold them all at once and push outwards to push the springs inwards, then pull forward with a bit of strength and it should come with you.... enjoy

Thanks Mark

hi
normally nissan use a 1 or 2 plug loom, as long as noboby has butchered it to fit aftermarket radio, shouldny have a problem getting a loom. try daltac.co.uk.
hope this helps

sounds like its wired up wrong, remove the radio unplug the connector and remove the radio, then check all your fuses must have blown one when radio was installed, after that charge battery and with radio removed see if battery goes dead, if not recheck wiring to radio, common problem with vw aftermarket radio,they are installed wrong,good luck,

new one with a usb connector and sd card reader is better and cheaper

Try radio shack, or stereo sales/installation place for ready to go plug adapter. For a few bucks, it saves headaches, and butchering the wiring in case you want to re-install old one later when trading in or selling the car.