Rear luggage light connector?

In this post you will see an example (for a different connector, of course) of the information you get in the online Electrical Wiring Diagram for connectors and terminals. (It has a link near the bottom to another post with the earlier steps of how you navigate down to the connector you're looking for.)

While the EWD will always show you a part number for the connector that goes on the wire harness, it is not always the case that its mating connector is available to buy. Sometimes the mating connector is just molded into the part being plugged into, like the luggage light. So sometimes you will strike out there. (There are even a few cases where you can get a part number for the connector on the harness, but it isn't available in the distribution channel.)

What I sometimes do as an alternative to a full male/female connector housing pair is just: back one terminal out of the connector housing you've got. In its place, insert one repair terminal purchased at the dealer, using the 82998- number found in the EWD. Get one of these little Euro-terminal blocks in a size that the whole original metal terminal will fit in:



You can insert the terminal far enough into the terminal block that the clamping screw clamps down on the crimped part, you don't smash or distort the shape of the mating part. Join there also the free end of the repair wire you bought, and click the terminal on the other end into the original connector housing. Also clamp in a wire to your extra switch.

Any time you want to go back to stock, just undo that and click the original terminal back into its original place. Good as new.

Another approach I used just recently was to kind of roll my own "connector housing".

 

Sometimes 'available' to a commercial kit manufacturer is not the same as 'available' to a retail purchaser.

A bunch of these connectors seem to be made by Yazaki, judging from their little wedge-shaped logo. There was a time years ago when I lived in Michigan, and I stopped in to a big Yazaki facility that I recognized from regularly driving past it anyway, and by having a nice conversation with somebody I found there, I was able to walk out with a few connectors I was looking for as samples, and without having to order 10,000 of them.

 

Again, another option you have is to back the terminals out of the housing (they come out quite easily once you grasp the double-lock arrangement) and park them in a Euro block with your added wiring. Completely revertible to stock then (if you don't lose the housing).

 

The Electrical Wiring Diagram says the housing for connector R16, for the No. 2 Room Light Assembly, has Toyota part number 90980-10860, and its female terminals are available pre-crimped to repair wires (pigtails), part number 82998-12340.

The Wire Harness Repair Manual identifies the mating connector housing, part number 90980-10859, and its repair wires, with male terminals, part number 82998-12330. These parts should all be available at U.S. dealers.

These connectors are part of the series that Toyota calls “2.3 II,” which is actually the Sumitomo TS 090 series.

I don’t think Sumitomo Wiring Systems sells directly in small quantities, but I can recommend hi-1000ec.com, a small business in Osaka, Japan, which does. You can search for the Toyota part numbers on their site to see the equivalents. They take export orders, but the cost of international shipping might make a local Toyota dealer a better option if you need only one housing and two pigtails.

 

That publication sounds like one I should spend more time with. Is that on TIS? Where does one find it?

 

I believe the Wire Harness Repair Manual is on TIS, but it may be tricky to find. A PDF version is linked from the PriusChat Wiki page. Its main value today is as a catalog of connectors, repair wires, and accessories; newer editions of the Electrical Wiring Diagram include similar information for the models they cover.

Another useful reference for wire harness design, installation, and repair, available to the public at no charge, is the GM Upfitter Integration Best Practices Guideline Manual, which shares many hard-won lessons from GM’s engineers; it has a 146-page Electrical Best Practices section.