1991 Eagle Talon 91 Talon wont start

Electrical problem
1991 Eagle Talon 4 cyl All Wheel Drive 130000 miles

I just bought 91 talon a few days ago it started right up and ran great the whole way home. As soon as I got it home I pulled it in the garage shut it off and took the stock radio out to replace it with my cd player. Someone had previously sliced the wires for their system so I had to cut the plug off and run the wires to my cd player couldnt use a harness. As soon as I finished the car wouldnt start just makes a clicking noise checked the starter its good got a new battery and terminals still wont start is there anything that could be messes up in the radio wiring. Also there is I alitle box behind my cd player that clicks pretty loud think its the efi relay. Any help would be greatly appreciated.