new stereo in 206 not working

[R TOY]

My lad has fitted a JVC head unit into his 206xsi and is having problems getting it to work correctly.It has no constant feed so loses settings, unit turns on when doors unlocked and turns off after a delay when doors locked, the steering wheel contols do nothing and the display lights dim when ign turned on instead of with lights. The car already had an aftermerket stereo when he bought it so he has not got origional. Local leky place have fitted an adapter loom and now say that the wires inside the doors need altering at £100 each?? Will appreciate any info.
Thanks.

[megamaniac]

Sounds like its getting its power from the interior lights circuit which automatically dim down when you get in try finding a better power source .
Paul