Model S Spare 12V Power Circuit | Wire Harness Identification

[matt1981m]

I have a 2017 75D that I am going to wire in a 12v USB-C PD & QC3.0 USB-A outlet hidden under the dash for a couple wireless chargers so I free up my 12V socket, and can hide some of the wires. While I am at it, I was looking at adding second 12V Socket in the rear trunk. I was thinking about making a simple T-harness so I can revert to stock easily. I need some help identifying what the part numbers would be for the M/F ends of the 2 harnesses though.

The first one is located on the right side of the center console, and is a spare 12V circuit that would operate only when the ACC circuit is energized, limiting the battery drain. Here is info from a PDF Tesla produced regarding it's location and pinout.

Looking at it, it is similar in size to the ODB2 port, but has smaller terminals throughout the connector instead of just in the middle like the ODB2 port.

The second connector is on the right side of the trunk area, and is the larger connector that supplies power to the Power Trunk Liftgate Control Module. On this connector, pin 7 is ground, and pin 8 is a +12v constant. I am not concerned with battery drain, as I would only be using this occasionally, and the devices connected to it would never exceed 5A. I plan on having a 10A inline fuse connected to it to protect the circuit.

 

[matt1981m]

Realized I missed one of the pictures of the second connector...

 

[matt1981m]

I believe I have located the rear connectors needed... Still stuck on the ones up front though.

Female Connector: 31372-1000

Male Header: 34695-0100 (Vertical orientation)

 

[matt1981m]

Jackpot...

Male Connector: 6098-5604

Female Connector: 90980-12739

....Now to find where I can source them quicker than alibaba

 

[gavinli2007123]

Try the usual electronics suppliers, digikey, elemet 14, mouser, lcsc. just google electronics parts suppliers, but the ones i mentioned are the main suppliers.

 

[matt1981m]

Yep, all the usuals were a bust for the sumitomo plug. Ended up buying the M/F plugs on AliExpress. Should be here mid August.

 

[KalJoMoS]

Can’t find the post now (posted some time ago) but I ended up using just two similar cables with quite long pins in the rear trunk to attach separate 12V plug. Here are the photos, to my surprise they did fit.

 

[matt1981m]

Can’t find the post now (posted some time ago) but I ended up using just two similar cables with quite long pins in the rear trunk to attach separate 12V plug. Here are the photos, to my surprise they did fit.

View attachment 961050View attachment 961051View attachment 961053View attachment 961052View attachment 961054

Yep that's the Female Connector 31372-1000 I was talking about. Those pins provide a constant 12v 10A circuit to the Liftgate Control Module for those vehicles with a power liftgate. I made a T harness (34695-0100-->31372-1000) with the necessary connectors and terminals from Mouser.com & some some extra 18AWG wire I had laying around. I would have taken some pics of it, but it was late when I did it, and tbh I did a pretty crappy solder job connecting the wire to the header pins. It may look like crap, but it is solid and it works!!!

I ordered 6098-5594 & 6098-5604 connectors with 22AWG leads attached from AliExpress but realized after it took 20d to arrive that I needed 18AWG & 20AWG based on the existing spec.

Also... When I started this idea, like an idiot I had been pouring through the service docs (just the repair/replacement stuff) on service.tesla.com and scouring random sites to find the connector types because I didn't see the link for the Circuit Diagram and Connector Reference guides listed to the right of the Service Manual link. I literally found all of the necessary part numbers for these connectors (and others I have stumbled upon since) via those with ease.

 

[matt1981m]

I was looking on AliExpress and found a seller who was making a similar T-harness to what I wanted for the spare 12v circuit in front, only they had jumpers on the wrong pins and using different gauge wires. I sent them a message asking if they would make one with the correct gauges & with leads on pins 2 & 10, since those are the ones needed. I figured I could save some time rather than reorder the pins & connectors and build it myself... They just shipped it today for $20.00 USD, well worth it IMHO. I told them they should list that config on AliExpress so we will see... I will post a link to it if they do.