Bad FICM... Now what? - Ford Powerstroke Diesel Forum
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post #1 of 2 Old 03-25-2013, 08:57 PM Thread Starter Rookie
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Bad FICM... Now what?

So I know I have a bad FICM. I have had the batteries checked a couple times and they pass. Should I just pony up the money and replace them or get a bigger Alt (thinking 180-200 amp) or both? The truck is a 05 with Delco batteries (unknown age.)

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post #2 of 2 Old 03-26-2013, 03:02 PM
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What is the FICM Voltage when you are cranking, and your floating Battery voltage?

This will give us the real condition of the FICM. (Assuming its the OEM 48v unit)

I recently replaced my batteries, with another set of Motorcraft. I would say keep the alternator, unless you have need for more power.

When you know its the FICM, I'd start looking at the Bullet Proof Diesel unit, 4ph or 6ph depending on where you want to go with your build.
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