ISO A/T Wiring Diagram

[bakwoods]

Like the title says, ISO wiring diagram for the A/T R32 4 speed. I can't seem to find one anywhere. Since I can't find the harness, I'm going to see if I can just snip some connectors off of my old chassis harness and re-pin them for the various wires. 

If anyone's got a lead on the diagram that'd be amazing. Also, can someone throw up a picture of their fuse box? There's 4 plugs on the side for the autos, I want to see what plugs go where. I'm assuming 3 plugs are for the transmission inputs since there's 3 sets of wires, the other plug I'm assuming is either alternator or something else?

 

Thanks!

 

[bakwoods]

I've included some pictures of the cut wiring. The moron prior snipped the connectors off and hard wired a lot of things. I wish I had taken a look before undoing this. Unfortunately it was so jacked up that nothing matched. To add insult to injury, the new chassis harness and the old chassis harness TCM plug wiring colors are different. They were both A/T so I'm assuming different year or different trim? The new chassis harness supports more things my old one didn't (EGT probe) and some power options. 

I've identified the brown + black wire as going to a connector and I fortunately had a spare pigtail I can make work that fits the bottom plug on the fuse box. Though I still have the 3 sets of wires. I'm assuming they're 7 pin, 7 pin, 3 pin. There's terminals on the fuse box for just that.

If someone would be kind enough to check under the hood, trim back some of the wire and just take a picture of all three plugs from the transmission side going in so I can see what wires go to what pins. I still need a pigtail for a 7 pin plug which is missing. I wonder if it's possible to convert a male pin plug to female?

[bakwoods]

Minor progress has been made. Old chassis harness was part # 24010-03U10 (CA18i motor) and the new GTS-T harness is part #24014-01U11 (RB20DET motor). If it's any consolation, if anyone needs to look up part numbers for their harnesses use the following link:

http://jp-carparts.com/nissan/carlist.php?maker=nissan

[bakwoods]

Update: The brown and black wire go to the inhibitor switch. If you look at the picture uploaded, it's the plug on the bottom of the fuse box. 

For those doing the M/T swap you'll know that you can merely bridge this connector with a single wire and two space connectors. It'll allow you to start the car. For us slush box guys, the same principle applies. Though frankly, every wire should have a home in my opinion. 

The other plug I discovered is the gear selector. I'm still yet to find any sort of TCM pin out nor is there anyone who's even cut the plug off and dissected it, however what I do know is that you can use the male end (chassis side) to tap into the reverse lights. From what I've read it's a red wire and a green with white stripe wire which are for reverse. 

All that's left is to deduce what the other wires are. Similarly, I looked closer under the car, there's a shielded cable with a red and white wire coming off of it. Previous owner cut it back and tied in another wire to the shielding wire. Not sure what the purpose was, if anyone has any clue it'd be helpful.

Also....what the hell is the 3 wire plug on the fuse box go to and what does the brown plug go to?! It's driving me nuts!

[bakwoods]

I had significant difficulty finding any kind of pinout for the TCM, however this will prove helpful to anyone with an A/T transmission.

 

Nissan RE4R01A Transmission Pinouts

---

This Socket is on the Transmission Loom and on the Tester's Computer side.	This Plug is on the Vehicle's Computer Loom and on the Tester's Transmission side.
1     2     3     4     5     6     7     8	4     3     2     1     8     7     6     5

Pin

Use

Socket  Wire Colour

Plug  Wire Colour

1	Solenoid "B"	Yellow	Green
2	Solenoid "A"	Green	Green/Black trace
3	Overrun Solenoid *	Grey	Green/Yellow trace
4	Pressure Solenoid +	Red	Green
5	Lockup Solenoid	Blue	Green/Red trace
6	Temp Sensor	White	Green/White trace
7	Temp Sensor	Black	Yellow/Red trace
8	4WD Temp Switch

* Activates Upon Various Throttle Openings 
* Note: Apply power to Overrun Solenoid (To be Off)
+ Pulse Modulation Controlled By Computer     In addition to this I'm working on the gear selector wires which I will do a separate diagram for.  

[niZmO_Man]

Nice work.

[bakwoods]

@niZmO_Man the wire colors on the plug don't match the above, however based on the pin locations alone I assume they serve the same purpose. 

I will transpose another diagram with the grey plug and again the brown plug.