You should be able to turn the crankshaft clockwise by hand with a socket and 1/2" breaker bar. If a connecting rod broke and caused it to lock up, that would not happen without you hearing a lot of noise first. If something caused a loss of oil pressure, the pistons would scuff and you'd notice overheating and a severe loss of power long before the engine quit completely. If it quit instantly, as though you had turned off the ignition switch, that is typical of a failed sensor, but that wouldn't stop the starter from cranking the engine normally.
Lets start with some electrical basics. Measure the battery voltage, then measure it again while a helper tries to crank the engine. Also, measure it with just the head lights turned on.
Wednesday, February 19th, 2014 AT 6:07 PM