,i can only think of one thing short in the wire somewhere, ?????
WRONG - open wire not shorted . Looking at wiring diagrams an using a DVOM - digital volt ohm meter to test the starter electrical circuits is the proper way to diagnose . Plus knowing how the circuit works would help . Your going at this blind.... That's why professional technicians go to training classes an why the factory spends millions on publishing service repair manuals . Looking at a wiring diagram i see that when the key is turned to the start position it sends a voltage signal to the PCM - engine control module . The PCM then supply's a ground to energize the starter relay ,this will close the contacts inside the relay sending B+ voltage to the S terminal on the starter solenoid . I see the PCM/CRANK fuse 10amp. located in the I/P fuse box. PCM/ABS fuse 10amp. I/P fuse box . I also see fusible link C (gray) this comes from the starter main batt. cable hook up. Do you know how a relay works ?
VEHICLE RELAYS Operation Diagnosis
Having a factory or professional grade scan tool to check input from the ignition switch to the PCM an checking starter relay control would be a big plus in the diagnostic procedure . But can diagnose without it. Does your vehicle have a security light lit on the instrument cluster ? If so , this will keep the PCM from starting the vehicle . Free wiring diagrams here
http://www.bbbind.com/free-tsb Enter vehicle info. year , make , model an engine size. under system click on engine , then under subsystem click starting . Click the search button then the blue link.
Electric Testing Techniques You Need to Know