I bought a new LG cd player for my 1996 Peugeot 406. I removed the old
Clarion tape/radio, and there were three connectors at the back, plus
the antenna. Two were iso connectors and one was something else, which
I presume connects to the stalk, for the sterring wheel control. I
ignored this one and connected the two isos to the two iso plugs in
the back of the LG cd player. The cd slot made noise (like it was
accepting or rejecting a cd) and then nothing. THe unit wouldn't turn
on. I replaced the Clarion but it wouldn't turn on either! There seem
to be a lot of adaptors available for post 99 406's, but they seem to
use a non-iso connector.

Can anyone tell me what's going on? Do I need an adaptor?

Thanks
Richard