Adjust altenator charging set point
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4wd High
Joined: Aug 2023
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Adjust altenator charging set point
Just replaced my alternator, and previously replace my battery with an AGM style one. Specs for the AGM battery requires approx. 14.7 volts to properly charge the battery to full charge state, but then needs to be reduced to 13.8 for float. Is it possible to program the ECU to monitor the charge state of the battery, and adjust the voltage as necessary. IE: To act as a smart charger.
Last edited by TonyTeo; Sep 4, 2023 at 12:02 PM.
Fleet Mechanic
Joined: Jan 2023
Posts: 1,316
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There is no information on the Forscan sites that show your model year F150 has settings for the battery type. Newer (2015+) trucks have this setting. Your ECU was probably not designed for the option of AGM batteries.
Lead Driver
Joined: Jan 2019
Posts: 5,075
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From: N.W. Alabama
which you still dont, heard of google, common sense tells you--> define voltage regulator-- 14.3-14.4v for the first 10-20 minutes of driving (on the first start of the day)
Then it varies from 13.5 to 14.0v throughout the rest of the day, and the load on battery. Our 20 year old alternator doesn't care that you put AGM in it, they're not that spiffy.
Then it varies from 13.5 to 14.0v throughout the rest of the day, and the load on battery. Our 20 year old alternator doesn't care that you put AGM in it, they're not that spiffy.
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4wd High
Joined: Aug 2023
Posts: 9
Likes: 1
Hi,
Have you verified that operation. I assume you also own a 2005 F150. If you found that info on Google or YouTube, can you please post a link.
Thanks,
TT
Have you verified that operation. I assume you also own a 2005 F150. If you found that info on Google or YouTube, can you please post a link.
Thanks,
TT
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More Turbo
Joined: Jul 2005
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From: Groton, MA
which you still dont, heard of google, common sense tells you--> define voltage regulator-- 14.3-14.4v for the first 10-20 minutes of driving (on the first start of the day)
Then it varies from 13.5 to 14.0v throughout the rest of the day, and the load on battery. Our 20 year old alternator doesn't care that you put AGM in it, they're not that spiffy.
Then it varies from 13.5 to 14.0v throughout the rest of the day, and the load on battery. Our 20 year old alternator doesn't care that you put AGM in it, they're not that spiffy.
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