The Ford Explorer uses an electric starter to turn the crankshaft and start the truck. The starter can actually be removed beforehand and brought to most automotive parts stores for a bench test. The bench test will determine if the starter is faulty or not. Replacing the starter is not complicated, as it is easily accessible under the truck, mounted between the engine and the transmission.
Ensure the truck is on a flat and level surface. Raise the hood for access to the engine compartment.
Locate the battery on the driver side of the engine compartment. Disconnect the positive and negative cables with a socket wrench.
Crawl under the passenger side of the Explorer to locate the starter mounted between the engine and the transmission. The starter is secured by two bolts.