Check both battery cable connections at the battery (clean as needed). Check the positive cable connection at the Power Distribution Box and starter motor, ensuring there clean and tight. Check the ground cable connections at body and engine block, ensuring there clean and tight.
If all the above are good and your sure the battery is charged, try the following:
Turn on headlamps and try starting. Does the headlamps dim or go off during starting?
If they stay bright or only slightly dim, look for starter control problem (Safety switch, starter relay, or solenoid). If they dim or go off, look for problems with the battery, cables, starter relay, solenoid, or starter motor.
2001 Ranger Edge 3.0 V6, 5 speed M/T
Limited Slip Differential, James Duff Traction Bars
Kumho 30x9.50 15 MT / Black 297 Series 15x7 Rims