Problem with Citroen C3 CD Player Fitting

[BRUN]

yesterday at work i fitted a CD player for someone for a C3, he has come back today saying that his central locking isnt working

anyone any ideas what it might be ?

it was standard ISO plugs and an aerial, thats all, nothing special/bare wires etc

 

[BRUN]

sorted it now, turns out you need an adapter from Citroen