92 power lock problem

Hi everyone im new to this site and im wondering if anyone can help me?
My power locks dont work and i cant even manually lock the back doors and this has cost me $240 in the last 2 days as ppl have went in and stole my stereo and some cash. if anyone can help me find out where the relay or the fuse for it is i would really appreciate it.

Thanks in advance.
badcavi