Dual Alternator Voltage Reading - Ford Powerstroke Diesel Forum
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Old 01-20-2012, 10:29 AM
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Dual Alternator Voltage Reading

Hey guys, I have the dual alternator set-up and just replaced both batteries with 850cca Motorcrafts. My check engine light came on with a DTC that read there's a voltage error, either <10V or >16V. However, when I put my voltmeter on the batteries with the truck running I was registering 13.1 on both batteries, but I figured it should be a little higher than this with dual alternators. What do you guys get with duals?
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Old 01-20-2012, 10:47 AM
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I get 14.1
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Old 01-20-2012, 12:15 PM
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Make sure all connectors are making good contact with the battery terminals. Especially on the inside of the connectors where corrosion products tend to build up and make a high-resistance connection.
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