2JZGTE wiring thread

[Black R]

Hi,

There's 2jz thread, but very little is discussed about wiring.
It seems most people either order a swap harness from one of several vendors for ~$800 or DIY.

I'm making this thread to keep track of the wiring challenges that go along with this swap.

Here's a pretty good online resource for wiring this swap:

http://my.prostreetonline.com/2014/08/13/how-to-wire-a-s13-2jz-swap/

[Black R]

One of the issues is with the alternator and upgrading it.

The s13 only has two wires, whereas the 2j has 3.
Also, a popular alternator upgrade is the Tundra 130 amp or Sequoia 150 amp alternator, and those have 4 wires.


Thhe tundra alternator has four markings on the sticker:

IG
S
M
L

http://i27.photobucket.com/albums/c164/Black_R/S13/C5042333-E15E-42D1-B89C-3E521289C026_zpschpi2fz7.jpg (http://s27.photobucket.com/user/Black_R/media/S13/C5042333-E15E-42D1-B89C-3E521289C026_zpschpi2fz7.jpg.html)

(In that order, clockwise from top left.)

The big stud on one side is I assume charging output to battery?


http://i27.photobucket.com/albums/c164/Black_R/S13/E681F36C-9F0D-40B9-9C6B-82E83A1524AA_zpsbcso3fdg.jpg (http://s27.photobucket.com/user/Black_R/media/S13/E681F36C-9F0D-40B9-9C6B-82E83A1524AA_zpsbcso3fdg.jpg.html)


The wire colors are white, blue, black, red.

I believe that makes the pinouts like this:

IG = white
S = blue
M = black
L = red


Here's a diagram I posted previously:


http://i27.photobucket.com/albums/c164/Black_R/S13/33178901-02C2-47A5-8F4D-3DFF7CE9A31A_zps5zq2maxt.png (http://s27.photobucket.com/user/Black_R/media/S13/33178901-02C2-47A5-8F4D-3DFF7CE9A31A_zps5zq2maxt.png.html)

From this, I deduced:


IG = goes to ignition switch
S = goes closest to positive battery terminal (fused)
M = B = goes to positive battery harness (fused). It is on the other side of the ignition switch connected to the positive side of the battery, but furthest from it.
L = lamp / battery dash light


So far, so good?


I found the 89-92 240sx wiring diagram in the repair manual that shows three wires on the oem s13 alternator:

W = goes to fusible link B
2nd W = merges with the other W and then goes to fusible link B
W/R = charge indicator bulb
B = ground to chassis


Here's the supraforums post again:


The supra 3 pin connector the pins are as follows:
1-L-terminal for charging light
2-IG-terminal for ignition power
3-S-terminal for Alternator sense

The Tundra 4 pin connector the pins are as follows:
1-S-terminal
2-IG-terminal
4-L-terminal

So pin 1 goes to 4, pin 2 goes to 2 and pin 3 goes to 1. The pin 3 is left vacant so use silicone sealant to fill it (toyota black fipg will work well also)



So on my pigtail...

IG = white wire = goes to ignition switch (fused) = turns the voltage regulator on - 12v switched
S = blue wire = goes closest to battery positive terminal (fused) OR run to ALT fusible link on s13 (it SENSES the battery) - 12v constant
M/B = black wire = MAIN alternator output terminal (connected to BATTERY)
L = red wire = charge indicator lamp in gauge cluster - Is this needed to complete the charging circuit on s13?
Ground = goes to chassis ground

[Black R]

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