I recently replaced the auto transmission in my truck. My friend dropped a wrench in between the frame and starter wires and I believe he shorted something. With everything back together on the truck, it won't start with the key. No click, no attempted turn over. But if i short the starter itself on the frame or straight wire it to the battery, the starter works fine. I checked fuses and haven't found any blown. Perhaps a relay? What could my problem be and how can I fix it? Any help is appreciated!