I have a 2001 SR5, so that's my focus, but I got to wondering about Toyota's system for naming parts, and how consistent it is over time.

I'm currently trying to learn/understand the electrical system in my car (stemming from a faulty security / alarm system) and in the process, have dismantled much of my vehicle's interior, examining wires and connectors etc. It occurs to me that it sure would be handy if the connectors were labeled somehow, and since I've got access now, why not label them myself? I'm thinking a neon color paint pen. It would make things much easier for the next round. Anyone done this?

And how "portable" will those labels be, anyway? Not that it matters too much (exceot maybe for the future salvager who dismantles my old car in a junk yard).

For example, in my 2001, the "Engine Hood Courtesy SW" (90980-11273) is called "E13". Is this same part called "E13" in all other year models?

Also, does anyone have a pic of this part, in place, on a 3rd gen? I cannot seem to find mine. Do I need to remove the radiator to get access to it? Thanks in advance if anyone knows.

But my main question is about Toyota's consistency over time in their naming of things.

(Also btw, does anyone have the wiring manual for 2001? I have the 2002 version.) Appreciate it if so!

This may help you.

3rd Gen - Electrical Connector List | Toyota 4Runner Forum [4Runners.com]

Edit: Not sure if this will be of any help, seems to be for EU vehicles.

https://www.toyota-tech.eu/wire_harness_rm/RM06H0E.pdf

Oh man, thank you!! That pdf is gold! How have I never seen that??

For those that don't know, that link above is for the "Wire Harness Repair Manual (RM1022E)" (file name "RM06HOE.pdf"), a 451 page manual describing in detail everything you need to know about connectors, including how each one disconnects. I only just glanced at it before jumping back here to thank you, so don't know if it being EU will matter much. I have hobbled along for years struggling to figure out so many things that that manual will help with, I cannot thank you enough.

You are more than welcomed, just paying it forward for all the info I have gained from this forum, this is what forums this like is for, asking for help and helping if you can, it only took me around 5 to 10 minutes to find those documents and looking at them to see if they would be of help, I also figured it would help others in the future and even myself, I figured many of those connectors apply to all T4Rs to some degree, so its win, win for all that needs the info!!