ok guys heres the situation....

recently took the tape player out of the car to put in a cd/mp3 player in my 1000 coupe... i tested it before screwing it in.. and it worked all good. but when i screwed it in it wouldnt earth.. so i took it out again and turned out to be a fuse which i replaced. i had it all working and when i turned on my blinkers the dash lights and the cd player flicker with the blinkers and when i put one side of the blinkers on, they both come on and my horn wasnt working before and now it is

is my best bet to just wire the cd player straight to the battery or something... a friend told me it might be my alternator?? i got an A12 alternator (A12 engine) and he said i might need an A15 alternator??

hmm well any help is welcomed

cheers
shaun