2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

Battery Voltage Woes!!

Old Feb 4, 2009 | 03:59 PM
  #26  
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Originally Posted by REDFC3S86
I looked at the other post u chimed in on concerning the fd alt in a s4. I remember looking at the diagram...u said something about the s4 to s5 being plug and play. what difference is there between wiring up a s5 alt and a s6 alt to a s4 car? I already have a dual pulley installed on my alt b/c the ac, airpump and ps were removed
hi mate

to put a series 6 alt into an FC

series 4 car = not plug and play, wiring mod needed + pulley mod

series 5 car = plug and play + plus pulley mod


the series 5 alternator into a series 4 car needs the wiring mod as well


so put your series 5 alternator into your series 4 do the wiring in my diagram..


as its also important that there is very little voltage difference between the B+ and S terminal as well for the alt to be happy
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Old Feb 4, 2009 | 04:02 PM
  #27  
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Originally Posted by HOZZMANRX7
On review of soooo many threads found via the beloved search button on FD alternators into S4's, this thread paints the clearest how-too picture on this subject.

Good job guys.
only to glad to help
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