battery light help - Ford Powerstroke Diesel Forum
 
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post #1 of 5 Old 07-12-2011, 06:32 AM Thread Starter
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battery light help

Battery light on dash starts flickering occasionally. Have an edge insight and notice that when light comes on module voltage is around 11 to 12 volts and normally its about 13.5 volts. what module voltage is the edge referring to and i also have a fairly new altenator. dont notice any performance loss when light is flickering. Any ideas.
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post #2 of 5 Old 07-12-2011, 07:58 AM
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From my understanding the battery light is supposed to be illuminated if the voltage drops below 11.5v.

Is it a constant fluctuation between 11 and 13.5v according to the insight? The Insight monitors the voltage from the alternator and should always read between 13 and 14.2v if it's reading anything less than 13v there may be a bad bushing in the alternator or a bad connection somewhere. Take off your battery terminals and the wire coming from the alternator to the battery and give them a good cleaning (use some battery terminal cleaner and a battery terminal wire brush) then tighten everything back up.

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post #3 of 5 Old 07-12-2011, 08:03 AM
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Is it during the first 90 seconds of starting the truck? If so, that is likely due to the glow plugs still being energized and you shouldn't really worry about that. If not, you should follow the instructions above.

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post #4 of 5 Old 07-12-2011, 08:08 AM
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If all connections are good then its probably just a bad alternator...
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post #5 of 5 Old 07-12-2011, 08:15 AM Thread Starter
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thanks for the advice. ill go home and chaeck all connections.
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