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Old 03-18-2016, 01:08 PM   #1
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Default Questions about alternator control in my Exocet

Question about alternator control - installing MSPNPPro for 99-00 miata using the 99 miata harness, engine is a JDM VVT engine, going into my Exomotive Exocet. I am also planning on using a Race Technology Dash2 w/ CAN interface and not using the stock gauge cluster.

I have read that the alternator circuit on the NB goes through the battery indicator light in the stock cluster. What I am less sure about is whether this is still the case w/ the MSPNPPro, and if so, what wiring will I need to do to keep the alternator functioning without the stock gauge cluster?
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Old 03-18-2016, 05:51 PM   #2
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Not sure if this helps but I would suggest just reverting to an NA alternator and get rid of that computer controlled alternator, when I went full stand alone that was the first and best thing I did, I had alot of issues with lights and getting a steady charging voltage, its not hard and I think took like an hour or so to do it.
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Old 03-18-2016, 05:58 PM   #3
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Quote:
Originally Posted by boileralum View Post
I have read that the alternator circuit on the NB goes through the battery indicator light in the stock cluster. What I am less sure about is whether this is still the case w/ the MSPNPPro, and if so, what wiring will I need to do to keep the alternator functioning without the stock gauge cluster?
use a spare PWM output. it needs a 1K pullup to 5v on the output wire.

use the miata selection in software for the alternator. put the batter indicator light on another spare output.


the end.

Last edited by Braineack; 03-19-2016 at 12:06 PM.
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Old 03-18-2016, 06:41 PM   #4
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Thanks Scott.
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Old 03-18-2016, 06:42 PM   #5
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Originally Posted by RAHNDEE View Post
Not sure if this helps but I would suggest just reverting to an NA alternator and get rid of that computer controlled alternator, when I went full stand alone that was the first and best thing I did, I had alot of issues with lights and getting a steady charging voltage, its not hard and I think took like an hour or so to do it.
Thanks, I was considering this as an option B, but I will try what Brain suggested first.
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Old 03-19-2016, 12:09 PM   #6
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like this:



you'll just use a PWM output, and then for the battery light a spare inj out or high current out.
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Old 03-19-2016, 08:07 PM   #7
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Thanks!
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