how do i check down the line between battery, alternator, and ECM? my 06 has an overcharge problem, my connections and fuses are fine. Is there a way to test throughout the circuit, or am i hoping for a snowball in hell? Im starting to wonder given the system is worked the way it is if i just need to bite the bullet and replace the ECM. Someone please tell me im wrong with that one. Or right. Which ever gets this girl back on the road.
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