Fitted new mazda unit 6-disc changer tonight. Had a few issues with it getting old one out with lots of small screw drivers in the holes (no radio keys) was a bit of a sod. Then no power to it so i thought it was faulty, so back in went the old one no power either, fuse i thought checked 15 amp fuse that was ok. So went to lock the car after much cursing, remote would'nt lock. Locked it with key came back to drive it engine management light on Grrr. Had a conversation with a mate told me to check all fuses found a blown 10 amp one for interior lights. Now everything ok new cd player no engine managment light central locking ok just 2 hours of cursing. :

10 amp Room fuse. Should have asked me