FRS Alternator Plug - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

gtpvette · 05-27-2018, 01:39 PM

Any of you guys wiring up the FRS Alternator plug?? If so,,, how?? It's A43, purple, orange and blue with red stripe??

Thanks!!!!

AmorAutosport · 06-13-2018, 03:36 AM

Look up wiring for a 3-wire alternator. There’s usually.

Field (FR) that goes to a switched +12v source
Signal (S) which is going to a +12v source with high load, I usually wire it to a fuse block, basically this wire is what tells the alternator what the current power is so it can regulate voltage.
Lamp(L) here you would put a charging diode with the negative end to lamp and the positive end tied into +12v switched power I typically use the FR wire. Without this the alternator will never charge

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AmorAutosport · 06-13-2018, 03:38 AM

The frs alternator is probably the same as the sti/wrx which I have the wiring for, the colors might not be exactly the same.

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05-27-2018, 01:39 PM	#1
gtpvette Senior Member Join Date: Mar 2015 Drives: 2015 FRS - FFR GTM Location: Key Largo, FL Posts: 785 Thanks: 240 Thanked 817 Times in 378 Posts Mentioned: 9 Post(s) Tagged: 0 Thread(s)	FRS Alternator Plug Any of you guys wiring up the FRS Alternator plug?? If so,,, how?? It's A43, purple, orange and blue with red stripe?? Thanks!!!! Attached Images __________________ 2015 FR-S - One Day I'll Finish The Swap

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06-13-2018, 03:36 AM	#2
AmorAutosport Member Join Date: Mar 2017 Drives: 2015 FRS Location: San Diego Posts: 43 Thanks: 1 Thanked 33 Times in 18 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Look up wiring for a 3-wire alternator. There’s usually. Field (FR) that goes to a switched +12v source Signal (S) which is going to a +12v source with high load, I usually wire it to a fuse block, basically this wire is what tells the alternator what the current power is so it can regulate voltage. Lamp(L) here you would put a charging diode with the negative end to lamp and the positive end tied into +12v switched power I typically use the FR wire. Without this the alternator will never charge Sent from my iPhone using Tapatalk

06-13-2018, 03:38 AM	#3
AmorAutosport Member Join Date: Mar 2017 Drives: 2015 FRS Location: San Diego Posts: 43 Thanks: 1 Thanked 33 Times in 18 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	The frs alternator is probably the same as the sti/wrx which I have the wiring for, the colors might not be exactly the same. Sent from my iPhone using Tapatalk

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