golf gti mk4 strero problem

[vwkevgti]

hi all this is my first post joined up on here because ive just got a mk 4 gti 1.8 20v black 3dr its mint.any way my first problem is its only got the standard cassette player in and really want to change the head unit to a cd ive tried all ready plugged my new head unit in all was fine till i took the key out and tried to use the remote central locking nothing happend tried my spare key just to make sure it wasnt the key still no joy. gets back in to the car thinking whats up    had a look on the cd player the hole thing had froze and said mute on the display wouldnt let me do any thing none of the buttons would do any thing.ive put the standard head unit back in for now its working now but if i hear take that once more think iam gonner go mad  .what should i do has any one ever had this before if so how did you  sort it out thanks     
thanks for any help
kev

[vwkevgti]

   no body likes the new boy 

[Rhyso]

lol welcome to the forum

as for your problem.....not entirely sure.  I know that sometimes you have to swap a couple of wire around to enable aftermarket H/U's to work 

at first i thought you'd blown a fuse but then you said everything works when you re-fitted the standard H/U

[AlanD]

I had to swap two cables around to get my HU to power down when I took the key out. I didnt cause the problems that you have said tho. I also cant for the life of me remember which cables I had to swap. All in all I have been no help really lol.

It does sound REALLY werid what you have said, never heard of an aftermarket HU messing about with your locking and things like that. I can only assume that your 100% sure you plugged everything in proberly and in the right sockets.

[vwkevgti]

  hey thanks chaps yeah i pluged them in right  they are fool proof you cant mix them up. i did plug an halfords iso block in that i didnt need and payed 13 qid for it  but tryed it without the iso block and still no joy.there isnt enough wires in my h/u to match up with the golfs wiring if you know what i mean. thanks so far anyway chaps     

[Pennith]

I got the same problem, bought a '98 mk4 golf gti , central locking didnt work with the key fob. I bought a new cd player for it and when i took the old one out the central locking worked, put the old one back in it stopped working. Now i cant get any cd players working in it! Checked fuses, all fine! The cd player will take in cd's and eject them just wont light up or switch on!

[Heyho]

What's happened is that you've shorted out the K-bus, or K wire as I think VW refer to it.  It's basically a communication line between body control units - if you short it to earth or live, you won't get any communication on it - hence the locking fault.  It won't do any permanent damage. The factory headunits are connected to this line.

Find the wire , disconnect and insulate it from the stereo loom.