by PToombs » Mon Oct 01, 2012 4:56 pm
Put a voltmeter on it and see what it charges. Should be 14.6 or so. If you turn on the lights and heater and it drops way down, it's probably the alternator. If it's only 12 ish, you need to figure out if it's the alternator, PCM, or the crank sensor is bad and not telling the PCM the engine is running.
pete
Just enough power to break everything behind the crankshaft.