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Old 02-27-2019, 07:50 PM
  #11  
danzcool
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Originally Posted by 08'MustangDude
...As far as a 200AMP alternator, most ECUs and BCMs and such regulate the current anyway, and adding
more amps doesn't pass through the car unless updated for a 200 AMP alternator. This does not apply
to electric steering, that current is passed separately. Not sure if it is true with the Mustang, but if I
wanted to update to the 200 AMP alternator on the Charger, I had to program the ECU for it.
the 2005-2009 mustangs do not need to have any reprogramming, just tapping off the heavy gauge wire from the alternator to the battery to the secondary battery in the back with a big fuse...
But I'm sure I'm not telling you something you don't already know of how to bypass.
I have the PA performance 200A alternator in my 2008 and I'm not doing anything with audio, I'm more into the engine music...
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Old 02-28-2019, 05:10 AM
  #12  
08'MustangDude
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AS of now, I do not need a 200A Alternator... With the Charger, I just used an 80amp
isolating relay for the AUX battery. When in ACCY, the batteries were separated, and all
the audio and interior ran off that. When in RUN, they were paralleled, and charged both
with the car running. I am going to install a smaller power cell in the engine bay for
my remote lighting and accessories, with an isolating relay.
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