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The clicking from the relay indicates either a fault with the relay or its controling circuit.
As relay have been replaced, that would rule it out as the cause.
At ignition coil, test the Dark Green/Orange wire for battery voltage with ignition switch turned on and while cranking. If voltage is not stable, it could be a fault with the alternator which provides the power.
Check all ground circuit connections for contaminations and looseness. Remove and clean them to ensure proper conductivity.
Check the auto shutdown relay.
If above fails, it could mean a failing PCM that is intermittently not grounding the relay and other circuits.
Wednesday, January 27th, 2010 AT 12:46 PM