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s5 altenator on s4 car

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Old 11-03-09, 10:40 PM
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STEP ASIDE !!!!!!!
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OR s5 altenator on s4 car

plez help , some 1 said i need to run a seperate wire to fuse.is that true?
Old 11-03-09, 11:42 PM
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Originally Posted by barney1omm
plez help , some 1 said i need to run a seperate wire to fuse.is that true?
true,, "S" terminal ( pin closest to the B+ post ) needs to be wired directly to the EGI fuse,, or the battery
( or starter post in cars with remote mount battery )

do not use the redundant "R" terminal wiring from the old alt plug
it will amount to be a trickle down drain if hooked up


also,, cars with s5 alts have OEM harness with twinned B+ wires
while s4 alt cars have only one B+ wire
this is due to s5 alts having higher rated amp output
so,, it will also pay to add another B+ of suitable gauge for the current intended directly to the battery or EGI fuse
Old 11-04-09, 09:12 AM
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thx alot
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