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-   -   s4 wiring harness alternator wire? (https://www.rx7club.com/2nd-generation-specific-1986-1992-17/s4-wiring-harness-alternator-wire-1034438/)

Detriuch 05-05-13 11:13 AM

s4 wiring harness alternator wire?
 
Ok so guys im in the middle of doing my s5t2 conversion into my s4 car. im running my s4 ecu. And for some retarded reason i cannot find the wire with the ring that goes on the side of the alternator.i found the 2 prong plug that goes in the back of it but not the wire that fits over the small 10mm pole. i only see one ground around that and i thought that goes to the block. Anyone got a picture of that single wire color? Thanks

misterstyx69 05-05-13 11:34 AM

hmm.I know on an s4 it is on the Driver's side harness.
black wire.

Detriuch 05-05-13 11:44 AM

ahh thats my problem then thanks i thought it was on the engine harness. the guy before me did a "wire tuck" so im trying to pull all of these freaking wires out.

misterstyx69 05-05-13 11:57 AM

If you are running an S5 Alternator you will have to look at the Alt Conversion chart.
Your Old s4 harness had a plug that went to the Alt and it won't be used with the S5/FD type alternator now.
Only one wire will be used to connect up.(besides that thick black one).
So one of the Wires off that Big Connector pigtail will now go to the Screw terminal too.You have to make a wire that has a ring terminal on it going from the connector to the Screw on the Alt.
So the Big wire and a wire from the Clip( on the alt) are connected.That is used to excite the alt.Without it your alt won't charge or put out correctly.

RotaryEvolution 05-05-13 12:55 PM

the S4 alternator connector was a rectangular plug with a white/black and a black/white wire on it. the pigtail came off right at the charge wire ring terminal near where the CAS connector terminated.

Detriuch 05-05-13 02:32 PM

im running the s4 alternator. and i found the 2 wire connector in the engine harness just fine. the problem is i cant find the ring connector that goes to the other corner of the alternator. is it on the car harness or engine harness? anyone have a picture of what wires are around it?

Detriuch 05-05-13 02:35 PM

1 Attachment(s)
what does these connectors go to? this is off of the car harness

misterstyx69 05-05-13 02:51 PM

follow your battery harness.(subharness) it is on that.
that wire connects to the battery eventually anyways.

RotaryEvolution 05-05-13 03:09 PM


Originally Posted by Detriuch (Post 11459352)
what does these connectors go to? this is off of the car harness

oil level switch and oil temp switch.

Detriuch 05-05-13 04:01 PM

Well on my s5 engine the oil pan is differ so it looks like i dont use either one of those plugs.
ok well the last owner did a battery relocation so i cant find the wire. i guess i can just run a line from the battery to that pole. thanks

RotaryEvolution 05-05-13 04:07 PM

every rotary engine has an oil level switch, the wire may have broken off at the sender itself, which is fairly common.

Detriuch 05-05-13 04:31 PM

ok thanks i will looks for it


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