Hello everyone, I have just bought an 03 Fabia and have spent the day stuggling to fit a Sony mex-250bt finally got it in with replacement facia and it all works but as soon as the key is removed it forgets all settings and pre-sets. I am completely non technical (to put it mildly) but have I done something wrong? David :confused:

It certainly sounds like it

Have you used a converter cable from the VAG wiring loom and the headunit, if I remember correctly live feed and switched feeds need swapping over. You can either pull the plug apart or buy the adapter. Search the ICE forum for the proper answer

Oh, and Welcome

Having just readup my own query I nhave read that I haveto swap thered and yellowwires on the ISO ! is that easy do they just pop out or is it more complicated?

Jam a bent paperclip either side of wire and the wire should pull out

Yes used theconverter cable in the box, I will see if the red and yellowcan be switched, thanks for the reply and the welcome. David

welcome to briskoda

Davy

There should be 2 bullet connectors on the HU loom. red-red & yellow-yellow swap them, red-yellow, yellow-red.

Oh and hello & welcome:thumbup:

There should be 2 bullet connectors on the HU loom. red-red & yellow-yellow swap them, red-yellow, yellow-red.

Oh and hello & welcome:thumbup:

I had to do the same for mine -

Welcome to Briskoda

Many thanks for advice, I have found a ready made solution on e-bay for £3.99 with the cables already altered. Just got to spend another few hours getting the thing out and then back in again. David

Hello and welcome. I found the same thing when I fitted a Sony HU in my old Fabia. I just swapped the red and yellow cables over.