Real time help alternator plug wiring colors

[Tres Toys]

I was rebuilding my alternator on my sons 2000 LC and the plug on the wiring harness broke like glass when I was taking it off. I bought a new plug, but when removing the remains of the old one I am not certain whether the wires got maintained in the correct order. My factory alternator wiring harness has a Red wire, a Brown wire and a White wire. I need to know in what order/orientation they attach to the plug housing. Below is a picture of a aftermarket plug. If someone could tell me how the red, brown and white factory wiring harness wire colors match up to the one below, it would sure help me out, or if someone has a picture of a factory LC plug with the wires still attached that they could upload, that would be even better! Thanks!

 

[outdoorsman]

I have a 2002 LC (which is not home right now) and a 2004 LC which has a higher amp alternator and different connector.

I have been trying to find a picture for you.

I dug this up from tread on here.

This is based on a 1998 LC

"L" wire is red with a blue trace. (I would guess red wire)

"IG" wire is black with an orange trace. (I would guess black wire)

"S" wire is white with a blue trace. (I would guess the green wire)

No guarantees

I hope that helps.

 

[Tres Toys]

Ok, thanks Outdoorsman. It seems the 98 is pretty close to the 2000 for wire colors. On the 2000, the L is red, the Ig is brown, and the signal is white. The white is easy to confirm as the signal wire with an ohm meter to the + battery terminal, the other two not so easy as they are both 12v when the ignition is to the on position. I ended up buying a plug from the dealer and was able to just snap the original connectors and wires into the back. The plug has a double lock feature for the connectors with a plastic tab in the front that gets pushed in after the wires are in place. I believe the replacement factory plugs is a better option than the aftermarket ones with splices. Below are some pictures of the alternator plug schematic, factory replacement plug and wire colors for a 2000. I replaced the brushes on the alternator as they were pretty wore down, but was lucky enough to take it to have it tested before installing as it must of had some other issue and failed. We ended up getting a rebuilt Denso off of Amazon. The rebuilt Denso didn't have the threaded hole in the casting for the wiring harness bracket, but it had a stamped bracket in that location to which we just added a bolt and two nuts to. I am not sure how people are getting the alternators out the bottom, it must be a little different on other year models. On this 2000 it didn't seem to be possible to pull it out the bottom without some serious bending of lines, which goes against my better judgement. We ended up just taking the radiator out and it made life much easier.

 

[2000LX470]

Ok, thanks Outdoorsman. It seems the 98 is pretty close to the 2000 for wire colors. On the 2000, the L is red, the Ig is brown, and the signal is white. The white is easy to confirm as the signal wire with an ohm meter to the + battery terminal, the other two not so easy as they are both 12v when the ignition is to the on position. I ended up buying a plug from the dealer and was able to just snap the original connectors and wires into the back. The plug has a double lock feature for the connectors with a plastic tab in the front that gets pushed in after the wires are in place. I believe the replacement factory plugs is a better option than the aftermarket ones with splices. Below are some pictures of the alternator plug schematic, factory replacement plug and wire colors for a 2000. I replaced the brushes on the alternator as they were pretty wore down, but was lucky enough to take it to have it tested before installing as it must of had some other issue and failed. We ended up getting a rebuilt Denso off of Amazon. The rebuilt Denso didn't have the threaded hole in the casting for the wiring harness bracket, but it had a stamped bracket in that location to which we just added a bolt and two nuts to. I am not sure how people are getting the alternators out the bottom, it must be a little different on other year models. On this 2000 it didn't seem to be possible to pull it out the bottom without some serious bending of lines, which goes against my better judgement. We ended up just taking the radiator out and it made life much easier.

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Thank you so much for this post! It came in really handy today after my rig lost power due to the alternator power connector being old and fragile. I was able to successfully attach the new connector I purchased from a local Toyota dealership (paid $11 out the door). Thanks, again!

 

[NC-Grayson]

Just replaced the brittle connecter on my 98LX with the oem part from the dealer. The only issue is my wires were in different orders than listed here on this thread. I replaced them according to how they came out of the cracked connector, but I’m now paranoid before I fire it up.

My wires went back together like this : S L Ig, but this post says it should be S Ig L.

Should I fire it up like it is and see? Or am I opening a can of worms? It won’t be hard to change the orientation of the wires but I have fat hands and dread digging it back open.

Thanks mud!

 

[aFortyanda100]

Just replaced the brittle connecter on my 98LX with the oem part from the dealer. The only issue is my wires were in different orders than listed here on this thread. I replaced them according to how they came out of the cracked connector, but I’m now paranoid before I fire it up.

My wires went back together like this : S L Ig, but this post says it should be S Ig L.

Should I fire it up like it is and see? Or am I opening a can of worms? It won’t be hard to change the orientation of the wires but I have fat hands and dread digging it back open.

Thanks mud!

Did you ever get this figured out? I feel like mine came out S L Ig but my connector was in a million pieces and I can't be sure. Everything I have found online is saying Ig should be in the middle. Battery is dead now so I am pretty positive I have it wrong but I'm not sure if I just switched S and Ig or if I have the whole thing wrong...

 

[dnp]

2000 Land Cruiser: Just ran into the same thing myself. The entire outside of the alternator harness connector completely fell to pieces as I was trying to remove it. Then, rather than staying in place on the pins to which they were connected (like on most every other connector I've ever seen), the individual wires let loose and came off of the alternator, leaving me no idea of where they were installed. Before I found this thread, I removed the alternator off of a 1998 parts 100 I have at my shop, and rather than trying to remove its connector, I cut the wiring harness so I could be sure of the wire orientation.

After I removed the '98 alternator, I could tell it was slightly different than the one for my 2000, and it's also a different part number. I verified online that it doesn't cross reference to my 2000 either. However, the connector looks to be identical, so I noted the wire orientation.

Unlike the W - Br - R orientation suggested above, the 1998 alternator (with what appears to be the same connector as the 2000 alternator) has a W - R - Br orientation (see photo below) Does anyone have access to a wiring diagram to advise this thread (for sure) how the wires should be oriented in a new connector? I don't know if this makes sense or not, but if both the red and the brown show 12v with the key on, would that indicated that they could be in either location? Probably not, but I'm sure someone with electrical knowledge can advise on that.

Anyway, thanks in advance for any help. (NOTE: if anyone is in need of replacing their alternator, there is a part number for a 100A OEM Toyota reman that's significantly less expensive than other Toyota alternators (I think it's an 80A) Maybe one is new and the other a reman, but the one I just picked up from Toyota this week was $144 + core. All the Denso remans I found were more expensive than that (IF they were available. Strange.) The Toyota part number is 27060-50260-84 See photo below)

 

[2000LX470]

2000 Land Cruiser: Just ran into the same thing myself. The entire outside of the alternator harness connector completely fell to pieces as I was trying to remove it. Then, rather than staying in place on the pins to which they were connected (like on most every other connector I've ever seen), the individual wires let loose and came off of the alternator, leaving me no idea of where they were installed. Before I found this thread, I removed the alternator off of a 1998 parts 100 I have at my shop, and rather than trying to remove its connector, I cut the wiring harness so I could be sure of the wire orientation.

After I removed the '98 alternator, I could tell it was slightly different than the one for my 2000, and it's also a different part number. I verified online that it doesn't cross reference to my 2000 either. However, the connector looks to be identical, so I noted the wire orientation.

Unlike the W - Br - R orientation suggested above, the 1998 alternator (with what appears to be the same connector as the 2000 alternator) has a W - R - Br orientation (see photo below) Does anyone have access to a wiring diagram to advise this thread (for sure) how the wires should be oriented in a new connector? I don't know if this makes sense or not, but if both the red and the brown show 12v with the key on, would that indicated that they could be in either location? Probably not, but I'm sure someone with electrical knowledge can advise on that.

Anyway, thanks in advance for any help. (NOTE: if anyone is in need of replacing their alternator, there is a part number for a 100A OEM Toyota reman that's significantly less expensive than other Toyota alternators (I think it's an 80A) Maybe one is new and the other a reman, but the one I just picked up from Toyota this week was $144 + core. All the Denso remans I found were more expensive than that (IF they were available. Strange.) The Toyota part number is 27060-50260-84 See photo below)


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Hey guys, sorry for my late response. I actually followed the exact wiring diagram that was shown in the initial post from Tres Toys. Just a few observations: 1) The LXs/LCs manufactured between 1998-2002 have much in common, however there are subtle differences. 2) There's a difference in AMPs generated from the alternator also (i.e. 100 vs 80). 3) Differences in the dashboard/odometer (i.e. 1998-1999 rigs didn't come with VSC but 2000-2002 did). 4) I am sure there are other minuscule differences as well which I can't recall at the moment.

Here's what I did for my 2000 LX last year. I purchased an reman alternator on eBay for less than $100 from a reliable seller. I figured it would fit without any issues, however, there was a difference: the 1999 alternator didn't come with the same casing (so to speak). I still made it work by making minor mods (not to the alternator but to my connectors). All that to say, I still followed the same diagram that's shown above because the wires coming down through the engine still utilize the same color coordination. When you purchase an alternator connector, make sure you match the wires according to your specific model year (i.e. 2000). I don't see why that wouldn't work since I too installed a 1999 alternator on my 2000 LX. These are my thoughts and like I said, I followed the directions above and it worked on mine.
Good luck to all of you! Let us know on here how it goes.

 

[mderrick]

did you ever determine this?

2000 Land Cruiser: Just ran into the same thing myself. The entire outside of the alternator harness connector completely fell to pieces as I was trying to remove it. Then, rather than staying in place on the pins to which they were connected (like on most every other connector I've ever seen), the individual wires let loose and came off of the alternator, leaving me no idea of where they were installed. Before I found this thread, I removed the alternator off of a 1998 parts 100 I have at my shop, and rather than trying to remove its connector, I cut the wiring harness so I could be sure of the wire orientation.

After I removed the '98 alternator, I could tell it was slightly different than the one for my 2000, and it's also a different part number. I verified online that it doesn't cross reference to my 2000 either. However, the connector looks to be identical, so I noted the wire orientation.

Unlike the W - Br - R orientation suggested above, the 1998 alternator (with what appears to be the same connector as the 2000 alternator) has a W - R - Br orientation (see photo below) Does anyone have access to a wiring diagram to advise this thread (for sure) how the wires should be oriented in a new connector? I don't know if this makes sense or not, but if both the red and the brown show 12v with the key on, would that indicated that they could be in either location? Probably not, but I'm sure someone with electrical knowledge can advise on that.

Anyway, thanks in advance for any help. (NOTE: if anyone is in need of replacing their alternator, there is a part number for a 100A OEM Toyota reman that's significantly less expensive than other Toyota alternators (I think it's an 80A) Maybe one is new and the other a reman, but the one I just picked up from Toyota this week was $144 + core. All the Denso remans I found were more expensive than that (IF they were available. Strange.) The Toyota part number is 27060-50260-84 See photo below)


View attachment 2284543

View attachment 2284544

 

[dnp]

did you ever determine this?

Man, I'm really sorry! I always (intend) to follow up when I come up with the solution to a problem, but I completely forgot to do it on this one!

Below is the wiring diagram. Next to each hole on the plug is a number, and those numbers correspond to the numbers on the W/D. Not the best image in the world (screen shot of a monitor), but it'll give you the correct orientation.

 

[mderrick]

Man, I'm really sorry! I always (intend) to follow up when I come up with the solution to a problem, but I completely forgot to do it on this one!

Below is the wiring diagram. Next to each hole on the plug is a number, and those numbers correspond to the numbers on the W/D. Not the best image in the world (screen shot of a monitor), but it'll give you the correct orientation.

View attachment 2470516

this matches the above picture i believe. I can confirm that this is the same as my broken connector in my 2000 LC 4.7L gassser.