Sub Harness for 98 LC Locking Rear Diff into 99 LX w/AHC

[Pulgasari]

Toyota sells the housings, but nothing else. Ballenger Motorsports has a few housings, and terminals and seals for the housings. You want black or grey seals; the green ones are for the engine conpartment wires – they're heat resistant silicone.

This is helpful. I don’t think I need any new housings since I’m just adding pins to an existing connector.

For now, I’m going for the Harbor Freight approach and using cheap Amazon hardware for the wires/terminals/housings. First step is to get the diff to lock with the switch. If I run into issues with the harness I’ll redo it with better quality parts and more experience.

 

[Pulgasari]

Ugh… tried to disconnect the frame plug with no luck. Literally spent two hours under the truck using every trick I found online and the M/F connectors would not separate. Hitting the connector from every angle to knock away dirt, spraying the connector in soapy water/windex to clean away dirt, spraying the connector with MAF cleaner to remove dirt, it’s still like these two are glued together.

Even tried breaking the tabs holding the connector together to pry the sides apart but that didn’t change anything. My plan was now to find out what the F 12 pin connector’s part number was, buy a new one from a dealer, and then destroy the F connector a little more and move all the terminals to the new F connector.

I haven’t had much luck getting an actual part number that seems legitimate. The M connector says 11086, so I looked up 90980-11086, which does produce a few results but none from dealers in stock. The corresponding F connector appears to be 90980-11087, but again, it seems like I’m doing something wrong. The few eBay listings I found do say that it’s compatible with the 100 Series, but they list it as an A343F transmission plug? Can you just not buy a 3x4 connector from Toyota dealers?

Ideally I could solve this problem tomorrow. I guess as a last resort I could go to an auto parts store and buy non-Toyota generic 12+ pin connectors and destroy both M/F connectors and salvage the terminals and move them to the generic 12+ pin connectors. Or I could just cut out the connectors and shrink solder the wires together directly. But those really don’t seem like the right solution.

 

[ndg]

From the Toyota 'Wiring Harness Repair Manual' you have the correct part number for the female. Don't worry about the transmission in the naming. Manufacturers will frequently give a part a name based on first use. If they later reuse it they don't then update the part description.

Have you tried calling a dealer to check availability? These types of parts are often not listed online.

 

[Pulgasari]

From the Toyota 'Wiring Harness Repair Manual' you have the correct part number for the female. Don't worry about the transmission in the naming. Manufacturers will frequently give a part a name based on first use. If they later reuse it they don't then update the part description. Have you tried calling a dealer to check availability? These types of parts are often not listed online.

Just called up my local parts department. Apparently it's been discontinued, nobody has it, and there isn't a replacement/successor part. Cars are fun!

I think the easiest/fastest way to solve this would be with an aftermarket connector.

 

[ndg]

Still available from one of the OEMs:

https://www.amayama.com/en/part/toyota/9098011087

You're in the US, so Corsa Technic could be an option:

4F1272-0003 (Black)<br /> 4F1278-0000 (Light gray) - Tokai Rika | 090II-12S - Corsa Technic | 12-Way Kit

Motorsport electrical products: OEM and hard to find terminals and connector kits, wiring, harness supplies, tooling, and sensors for modern and vintage motorcycle, automotive applications. Easy online shopping, low cost shipping options, to expedited around the world. We accept Paypal and...

www.corsa-technic.com

Or even amazon, unlikely to be OEM, but as good as most aftermarket connectors:

Amazon.com: 1x Connector 12-way for Transmission 90980-11087 w/out wire : Automotive

Buy 1x Connector 12-way for Transmission 90980-11087 w/out wire: Wiring Harnesses - Amazon.com ✓ FREE DELIVERY possible on eligible purchases

www.amazon.com

All of the above options would let you move the pins and sockets to your new connectors, and not add the risk of over/under crimping existing wires etc.

Edit to add - this dealer in VA has them on their website........

https://toyotaparts.ourismantoyotaofrichmond.com/oem-parts/toyota-housing-connector-f-9098011087?srsltid=AfmBOoqSKiAlNDcXB5r3mikQ6O1wovxq-1fjDxn3QbDoYWch1HC7-J3n