Chris, On your 2000 Ford Explorer: There are a number of things that would prevent your vehicle from starting. I would suggest, checking on the dash for an anti theft light. If the light is on your car key may need to be reprogramed or the anti theft switch may need to be replaced. Also check the car battery and its connections. The starter should also be rechecked. Good Luck.
〉 Answered on Jun 26th, 2014 by Maryann Croce, Owner at Croce’s Transmission Specialists