Balancing Act

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Update: 2012+ 3rd gen Prius power folding mirror connector

In the quest for organization and to make mods appear as OEM as possible, I revisited the illuminated mirror switch project and ordered a male 16-pin mirror switch coupler and 15 corresponding male terminal pins from I’ve recently discovered that they opened up a Global Rakuten shop and ships to the U.S. Toyota consider most male connectors as “standard parts”, i.e. part of expensive vehicle wire harnesses, and do not make them available for purchase.

Male 16-pin coupler

Male 16-pin coupler

For US$20 including EMS shipping, I received a package containing one 20P050-090K-M type male hybrid coupler, fifteen TS-050 series type male terminal pins for use with the aforementioned male coupler and an additional free set of 16 TS-050 series type male terminal pins with a sampler pack of 4 larger male terminal pins for use with the 2010-2011 10-pin connector. Pretty cool.


Using a handy Molex terminal pin hand crimping tool, I was able to make 15 male pigtails. A much cheaper alternative than buying pre-made Toyota pigtails. For instructions on how to use a hand crimping tool, follow this instruction by Molex.

The reason I bought these parts is to wire up yet another new illuminated power folding mirror switch I picked up. It’s from a Lexus (because the part can be ordered from your Lexus dealer, I am just not sure from which vehicle). The part number for the switch is associated with the JDM Toyota luxury MPV Vellfire/Alphard, but the part number also shows up in a Lexus part database.

The entire interface on the switch illuminates just like the other “Lexus” switch I bought used off of eBay for $75, but that switch has 27 pins on the back. This new switch I picked up has a 16 pin connector, just like the OEM 2012+ 3rd gen Prius mirror switch, making it plug-n-play. Matter of fact, you simply add two wires to the two pins on the switch that corresponds to the folding feature and connect those wires to the BLU and GRN wire from the folding mirror and you’ll have a fully plug-n-play fully illuminated 2012+ switch.

What’s NOT plug-n-play is the mirror switch housing. This new mirror switch, almost identical to the regular JDM power folding switch, is door armrest mounted, meaning there is no removable face plate cover. This also means that you will need to fabricate your own face plate and housing to secure it onto the driver side switch panel. Because this new all-illuminated switch is slightly larger than the Prius mirror switch, the faceplate from the JDM non-illuminated or illuminated mirror control switch will NOT fit. Fabricating a new housing is a weekend project in itself, which I will revisit later with a DIY guide when I have more time.

Because this new mirror switch is 16 pins and the auto-retract controller module from Top Sage International was designed for the 2010-2011 Toyota Prius, which has 10 pins, I ordered the connector parts to make a simple plug-n-play coupler. Of course I could have just used my OEM 2012+ mirror plug from the vehicle harness and plug it right into the mirror, adding two new wires to control the folding feature, but I feel the bundle of T-Taps and patch wires are not necessary when I now have a viable solution.

Upon further research, it turned out that the first switch I bought used from eBay was from a JDM Toyota Corolla Axio 1.5 Luxel 4WD CVT, part number 84870-12210-C0. How it got mixed up as a Lexus switch and ended up in the states is beyond me. The part number for the female corresponding 27-pin connector that plugs into this switch is 90980-12330.

In the long run, I may just ditch the Top Sage auto-retracting controller module and opt for a genuine 2012 JDM Toyota unit instead (folds on lock and unfolds on unlock). We’ll see, stay tuned for more info on the new fully illuminated switch.

BTW, also sell the male coupler for the 10-pin connector that’s found on non-illuminated switches. That means if you own a 2010-2011 Prius and want an illuminated switch, all you need are:

  • An illuminated switch of your choice, with 16-pin connector
  • A female 16-pin connector part #: 90980-12423 and,
    • 11 pigtails (non-folding) or 13 pigtails (folding), part #: 82998-24290 (sold individually)
  • A male 10-pin coupler, available at or re-use the one on the Top Sage auto-retract controller module

The next step involves mapping the corresponding wires from the 16-pin female connector to the 10-pin male coupler to create an adapter, and the rest is plug-n-play. Since the 2010-2011 Prius mirror switch is not illuminated from factory, you’ll need to tap the +LED wire to an available parking light wire and ground the -LED wire. These two wires will be mapped, but will be hanging as lead wires – since there are no such wires on the 2010-2011 Prius vehicle wire harness.

5 comments for “Update: 2012+ 3rd gen Prius power folding mirror connector

  1. James
    November 19, 2015 at 4:31 PM

    I’ve been looking everywhere for the A male 10-pin coupler but have had no luck at all. The only couple of places I found had a 500 or 1000 part minimum order.

    Can you please post a link to where they are available on hi-1000? I’ve dealt with them before but couldn’t find it on their site or rakuten either.


  2. Fred
    November 17, 2015 at 7:04 PM

    Do you have a link for the male 10 pin coupler. I’ve been searching but can’t find it.

  3. Fred
    November 16, 2015 at 10:42 AM

    I’ve been searching hi-1000 for a couple of hours for the male 10-pin coupler with no luck. Do you guys have a link… they have so many items it’s like finding a needle in a haystack lol.

  4. August 11, 2015 at 9:11 AM

    This article was written about the mirror switch that comes in the 2012 Prius (lighted) vs 2010-2011 (non-lighted) and wiring it up with the folding mirror control box that uses a 2010-2011 type connector for a seamless connection. What I eventually end up doing was create a bridge between the two different couplers as pictured. One goes into the mirror and the other goes into the control box. Since writing that article, there are alternate method to tackle the problem. Thanks for sharing the Rakuten link.

  5. Alan Somers
    July 23, 2015 at 12:55 PM

    I’m in the process of installing a new multimedia head unit in my 2012 Highlander and will be moving the back-up camera video from the Multifunction Display to the head unit. I plan to do that with an adapter harness. The harness into the Multifunction Display has the 90980-12423 connector on it.

    The male connector you found doesn’t fully resemble the geometry of 90980-12423. For one thing, 20P050-090K-M is a hybrid (multiple pin size) connector whereas 90980-12423 is not. The pin specs are different as well (050/090 vs. 025). How did you get them to work together?

    Rakuten Global sells an exact mate for the 90980-12423 connector: 16P025K-SMTS-M. It’s designed for circuit board mounting, but there’s no reason it shouldn’t suffice in a short adapter harness.

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