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Old 06-29-2020, 09:39 AM #1
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1998 front door on a 2000

I am in the process of temporarily putting a front driver side door from a 1998 onto my 2000. The reason for this is an entirely different story.

However, I figure I should share my learning and frustrations in the event it helps someone later.

Toyota changed the wiring architecture pretty significantly after the 1998 model year when they introduced the "Multiplex Communication System". The biggest change I see is with how the body ECU communicates with various devices and modules including:
  • DOOR LOCK CONTROL
  • HORN
  • MIRROR HEATER
  • POWER WINDOW (REAR)
  • REAR WINDOW DEFOGGER
  • REAR WIPER AND WASHER
  • THEFT DETERRENT
  • WIRELESS DOOR LOCK CONTROL

When trying to connect the door you will first notice the two large junction connectors the come into the front kick panel from the door do not match. You also cannot re-pin them because the pin-type and layout is completely different for one of the two connectors.

You will also find that the connector for the window motor/regulator is a simple 2-pin on the 98 and 5 pins on the 2000. This comes from changes to the auto-up/down function based on the wiring diagrams.

Swapping the wiring harness is possible if you also change over the window motor. The other individual connections to the speakers, locks, etc. are the same. You may be able to splice in a 2000 wiring harness to the 1998 motor and still get up/down function. I haven't tried this yet but I will be attempting to transfer the harness and will provide an update on what I find.

Anyway, I would assume anything in that list above will not be plug & play between 96-98 and 99-02.
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Old 06-29-2020, 10:12 AM #2
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Yes. I would say it's best just to replace the door wiring to your chassis and swap over what you have too. Basically the shells are the same the electronics is very different. Thanks for verifying and your tips. I am sure this will help others down the road.

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Old 06-30-2020, 10:02 AM #3
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I was able to swap a newer harness over onto the 98 door and get everything working without changing components themselves. I repinned the window motor connector and as expected, the only thing lost is the auto up/down. It still rolls up and down just fine. Locks also work with both the switch and FOB. The last thing that will need to be changed is the connector for the mirror. The 98 mirror is not heated so you can repin this connector as well to maintain the ability to adjust it with the switch.

Cheers!
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Old 01-01-2025, 12:09 AM #4
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I am sorry if this is old but I couldn’t find a more recent post. I don’t understand the forum search feature as it keeps taking me outside of the forum.

Can you please elaborate on what you mean by re-pin?

I have a 2000 limited and I took all 4 doors off and junked them before realizing I needed the wiring off them. I replaced the 4 doors with random sr5 doors from other junk 4Runners, not sure the years but the harnesses did not match up.

I bought correct harnesses off eBay. After swapping, door locks work and speakers work but the window function does not. I googled how to re-pin electrical connections and see that it involves re-crimping a terminal on the end of the stripped wire and clicking it back into the plastic pin housing.

I don’t understand how this fixes it because my pins don’t seem to be broken, so re-pinning doesn’t make sense. I am trying to look up wiring harness diagrams but I am not a smart person and I don’t understand what I’m reading or looking at.

Can you please dumb down what you did to make your windows work? And for an added bonus, what would it take to recover the auto up feature? Thanks

I’m in Phoenix, AZ
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Old 01-01-2025, 11:53 AM #5
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Quote:
Originally Posted by JamminHardcore View Post
I am sorry if this is old but I couldn’t find a more recent post. I don’t understand the forum search feature as it keeps taking me outside of the forum.

Can you please elaborate on what you mean by re-pin?

I have a 2000 limited and I took all 4 doors off and junked them before realizing I needed the wiring off them. I replaced the 4 doors with random sr5 doors from other junk 4Runners, not sure the years but the harnesses did not match up.

I bought correct harnesses off eBay. After swapping, door locks work and speakers work but the window function does not. I googled how to re-pin electrical connections and see that it involves re-crimping a terminal on the end of the stripped wire and clicking it back into the plastic pin housing.

I don’t understand how this fixes it because my pins don’t seem to be broken, so re-pinning doesn’t make sense. I am trying to look up wiring harness diagrams but I am not a smart person and I don’t understand what I’m reading or looking at.

Can you please dumb down what you did to make your windows work? And for an added bonus, what would it take to recover the auto up feature? Thanks

I’m in Phoenix, AZ
You're replying to a 4 year old topic...but luckily the OP is still active as of 2 days ago...BUT he still may not see your question without some notification...so I'm going to "mention" him which should notify him and direct him to this topic so maybe he can help you.... @raKnizek .
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Old 01-01-2025, 12:47 PM #6
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Hey there. The mention did in fact work!

I almost forgot I went through this.

In general, what I mean here by “re-pinning” the harness is reconfiguring how the wires, or terminals, match up on each side of the connectors. If the two different connectors in question use the same pin type dimensionally (the pin being the metal bit on the end of each individual wire), you can often remove them and place them into a different spot within the connector to ultimately change the wiring connections. The factory wiring diagrams are critical here to understand the difference between your existing wiring and the new parts you’re trying to get working. This was harder to explain than I expected. Hopefully it helps.

I never recovered the auto up/down function. I actually have my original door back on now as this was something I had to do temporarily.
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Old 01-01-2025, 02:33 PM #7
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I too have a 2000 with an earlier door and switched the harness from the 2000 to the 98/99
and like raKnizek has said, the only thing I dont have working is my auto up and down, which I really dont mind not having

I did have to put on a 2000 mirror so I could have the heated function, but that was plug and play as well
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Old 01-04-2025, 10:53 PM #8
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Thumbs up

Quote:
Originally Posted by raKnizek View Post
Hey there. The mention did in fact work!

I almost forgot I went through this.

In general, what I mean here by “re-pinning” the harness is reconfiguring how the wires, or terminals, match up on each side of the connectors. If the two different connectors in question use the same pin type dimensionally (the pin being the metal bit on the end of each individual wire), you can often remove them and place them into a different spot within the connector to ultimately change the wiring connections. The factory wiring diagrams are critical here to understand the difference between your existing wiring and the new parts you’re trying to get working. This was harder to explain than I expected. Hopefully it helps.

I never recovered the auto up/down function. I actually have my original door back on now as this was something I had to do temporarily.
Hey thanks for being kind and responding even after all this time. I truly hate people in the forum community. Any forum, not just car ones, which is why I avoid them at all costs. Unfortunately, this post was my only saving grace to this issue. Again I apologize for reviving an old thread, I know the forum people are really bothered by it.

Your explanation is very helpful. My 4Runner is a Frankenstein’s monster of a mess. The rear hatch and all 4 doors are from different 4Runners. I am looking for wiring diagrams but how do I know when I found the right one? I google it and I see many different styles of diagrams but none with a picture of the connector and arrows pointing to it for a dummy like me.

So my homework is to find the factory service manuals for my 2000 and the other years that relate to the harnesses, ok got it.

I am homeless, living out of a 1970’s van that doesn’t run while I use my 4Runner to drive around looking for work. I can’t afford a mechanic so I appreciate what you've shared.

Thank you from a fellow human that drives a 4Runner.
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Old 01-04-2025, 10:54 PM #9
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Quote:
Originally Posted by 3bears View Post
I too have a 2000 with an earlier door and switched the harness from the 2000 to the 98/99
and like raKnizek has said, the only thing I dont have working is my auto up and down, which I really dont mind not having

I did have to put on a 2000 mirror so I could have the heated function, but that was plug and play as well


I think i saw your post about the heated mirror, with the green wire running parallel? I read as many of the posts related to this subject that I could find. How do I know if my mirrors are heated? Originally my 4Runner is a limited trim but the doors are probably not limited
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Old 01-04-2025, 11:15 PM #10
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Thank you for the mention trick @AuSeeker
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Old 01-05-2025, 11:31 AM #11
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Thank you for the mention trick @AuSeeker
Just an FYI, quoting someone will also notify them.
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Old 01-05-2025, 11:16 PM #12
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Quote:
Originally Posted by JamminHardcore View Post
Hey thanks for being kind and responding even after all this time. I truly hate people in the forum community. Any forum, not just car ones, which is why I avoid them at all costs. Unfortunately, this post was my only saving grace to this issue. Again I apologize for reviving an old thread, I know the forum people are really bothered by it.

Your explanation is very helpful. My 4Runner is a Frankenstein’s monster of a mess. The rear hatch and all 4 doors are from different 4Runners. I am looking for wiring diagrams but how do I know when I found the right one? I google it and I see many different styles of diagrams but none with a picture of the connector and arrows pointing to it for a dummy like me.

So my homework is to find the factory service manuals for my 2000 and the other years that relate to the harnesses, ok got it.

I am homeless, living out of a 1970’s van that doesn’t run while I use my 4Runner to drive around looking for work. I can’t afford a mechanic so I appreciate what you've shared.

Thank you from a fellow human that drives a 4Runner.
Sorry you have had that experience. It can be hit or miss but people here tend to be more helpful than not over the years.

Yes, we need both the diagrams for your vehicle and the doors from the donor vehicles. Or most likely for the harnesses you bought off eBay. Which year/trim did they say they are from?

The diagrams are confusing. But in general they will show a specific subsystem and because they all connect, and there isn’t enough space on one page to show everything, you have to follow the inputs and outputs across the different diagrams. For the doors, I believe there will be a junction for where the door connects to the rest of the vehicle harness.

I may have some diagrams. I’ll look and get back to you.
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Old 01-06-2025, 02:17 PM #13
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Quote:
Originally Posted by JamminHardcore View Post
I think i saw your post about the heated mirror, with the green wire running parallel? I read as many of the posts related to this subject that I could find. How do I know if my mirrors are heated? Originally my 4Runner is a limited trim but the doors are probably not limited

I have had 3 different 3rd gens, two 2000 and one 2001. Non of them Limited's and all had heated mirrors. Its been a few years so dont remember how many wires come out of a heated mirror, but it was plug and play.
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