Could be a bad ground at the relay, or bad battery cable(s) Check and test cables. Use a voltmeter while cranking to see voltage draw at cables and at starter.
You might want to check the fusible links that attach to the relay...You have too much resistance in the circuit somewhere, when you jump the relay, does it crank slow or fast? If crank speed is good, remove and clean all cable and link ends at the relay, and make sure it has a good ground.
Monday, January 14th, 2008 AT 5:35 PM