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99 7.3 won't crank more suggestions please
Looking for help/suggestions.
Problem: 99 SD F250 7.3 running great before I replaced the fuel filter. Now will not start or crank over. Just a click like a dead battery. Had previous issues with clutch safety switch. Thought that was problem. Replaced switch. Still nothing. Traced clicking noise to starter relay switch under hood on passenger fender well. Jumped the switch with a screwdriver. Still nothing. When I jump the relay the clicking noise now sounds like it's coming from underneath the motor. I have not tested the batteries but feel confident they are not the problem. Both purchased recently from NAPA. Also the WTS light is functioning properly.
Any ideas you all might have will be greatly appreciated.