Mk4 gti head unit install, need help!

[danegti]

Does anyone have a wiring chart for what colour wire is what for the existing eurovox harness?
And will I need an antenna adaptor?

[Swainey32]

Golf mk4 headunit help - SQ & Technical - Talk Audio

and yes you'll need an antenna adapter

[danegti]

OK, so i've finally gotten around to taking the head unit out. I'm wondering what these two things are? im pretty sure the thing with the pink and black wires is just to suppress electrical disturbance from alternator and such? But not sure what the first picture is, it looks like its been wired in by a previous owner maybe? it just has a fuse inside it. It appears to be tapped into they yellow wire going into the eurovox head unit which from my research is the amp trigger

[Swainey32]

dont remember either of those

[JustCruisn]

Neither of those look like they are original.
1st is aftermarket fuse older.
No idea on the 2nd. Take off the foam and look for a part number etc.

Stock has an ISO connector, follow it back a bit and there is another connector.

[RubAVeeDubDub]

I just ripped out the old deck from the Bora, and even though the headunit was aftermarket, it had nothing like that attached behind it.

The factory stereo harness' are the Eurovox ones that all aftermarket ISO harnesses use. All you need to do is buy a ISO harness unique to your headunit brand and them its pretty much plug in and play apart from needing to switch the yellow and red wires on the ISO harness. Simple stuff. Easiest headunit wiring install I've ever had to do.