my brothers truck is giving me a fit. he drove it to work after work it wouldnt start clicked like a dead battery , used different battery same thing. replaced the starter and same thing.I can turn the motor over with a socket on the crank pulley.I can back the starter off the fly wheel and turn the ignition and everything engages as it ought to but put it back and it just clicks again. can 2 starters be bad? the second battery we used out of my truck does start my truck. I've checked the wire to the starter from battery and it 's fine. what can it be? thanks nick at XXXXX@XXXXXX.XXX