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I suppose you could also hook up a milivolt meter to the small terminals on the shunt on the A0 and read the current being sent toward the battery. every .001V measured on the small terminals = 1Amp of current passing thru the shunt…

What color are the LEDs flashing? yellow or green? 24V on the forward regulator terminal is good, those voltages on the output, not so much.… so if all your grounds are good, one of two things is happening. 1. The alternator or regulator has issues. 2. The batteries are horribly depleted or...

Do you have a voltmeter? With the engine running you need to see 24v on the forward small terminal stud on the voltage regulator(that is the truck telling the alt to generate power). If that is there, do you have 14.1/28.2 on the large output terminals on the alternator case? Does the A1 alt...