The central locking does not work on my son's 82 5 speed.

I have not removed the door panels yet to check connections or voltage but want to replace the 400mA fuses first. Fuse 21 is ok as my windows work fine.

Are there any other components that run off of those small fuses and where can you find these fuses locally? Radio Shack maybe?

If I can sort these locks out, which aftermarket remote locking system works best with a 82? An alarm is not necessary, just to unlock the doors without the key.

Thanks.