Won't Unlock

To start this is a car I picked up for my son .I am sure I could figure it out but the job and too many projects like the 2000 roush and the bullitt keep me occupied... To make it short the locks won't lock or unlock trunk botton in g box won't pop either, fob worked for a while then quit .Replaced remote entry mod in trunk but made no difference. Not adding anything else to interior till corrected, any thought's??
 
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