Measure the voltage on the feed wire to the coil pack, any injector, or either small wire on the back of the alternator. That used to be a dark green / orange wire but the colors might have changed for a 2003 model. You should see battery voltage for one second after turning on the ignition switch. What's important is whether that voltage comes back during cranking.
Tuesday, July 12th, 2011 AT 7:55 PM