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alternator wiring

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Old Oct 20, 2009 | 05:51 PM
  #1  
pr0honda's Avatar
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From: middleburg, florida, usa
Default alternator wiring

what would be proper wiring for your alternator if you are running stand alone and no stock harness? this car will be driven on the street so it needs a alt..

ive searched and all i found was that you have to run 12v to the alternator and person who said it worked for them told me in pm that he fried 2 alt before giving up and continued to run battery only..

any help would be great..
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Old Oct 21, 2009 | 09:22 AM
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Default Re: alternator wiring

some one has to know this..
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Old Oct 21, 2009 | 09:29 AM
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Default Re: alternator wiring

I wish I could help you man, did you try posting on the tech/misc section? Someone could help you there and good luck.
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Old Oct 21, 2009 | 09:40 AM
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Default Re: alternator wiring

I wired mine up just like the factory had it and have not had any problems. What ems are you using?
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Old Oct 21, 2009 | 01:34 PM
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Default Re: alternator wiring

https://honda-tech.com/forums/tech-misc-15/how-wire-b16a-alternator-up-custom-2241770/

Big whit wire to battery.
blk/yellow to 12v power ingition
hook white blue off blk/yellow with light

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Old Oct 21, 2009 | 06:10 PM
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Default Re: alternator wiring

Originally Posted by havok hybrid
https://honda-tech.com/forums/showthread.php?t=2241770

Big whit wire to battery.
blk/yellow to 12v power ingition
hook white blue off blk/yellow with light

thanks man that is how i wired it up today and while running i was getting 13.4-13.7v on my laptop from the alt power wire i was seeing around 14v so i guess its functioning.. im going to keep any eye on it and see how it goes.. im going to buy an actual guage for volts so i can see it when i dont have my software running..


i am running a dtafast E48 for now.. i also have a dtafast S60 which is newer and has a lot more features but for my all motor build the e48 is simple and works fine.. i like the dtafast sytems because i do not have a distributor..
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Old Oct 21, 2009 | 06:29 PM
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88ED8's Avatar
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Default Re: alternator wiring

Originally Posted by pr0honda
13.4-13.7v
What gauge wire do you have from the alt to the batt, I was also at 13.7~volts, when I upped the wire size from the alt to batt it went to 14.6~14.7v...
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Old Oct 21, 2009 | 08:08 PM
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pr0honda's Avatar
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Default Re: alternator wiring

I'm not sure the exact size but it's prob a couple sizes larger than oem..

I was getting about 14v at the alternator at idle..
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Old Oct 22, 2009 | 03:16 AM
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From: Pittsburgh, PA
Default Re: alternator wiring

Anything 14V and higher is perfect at idle.
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