Nakamichi Update - '99 LX 470

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Just to clarify some things in these instructions....

When you separate the four RCAs, each one will have a bare ground wire and a shielded color wire.

In the diagram I see the the Signal Positives (FR+, FL+, RR+, and RL+) all correspond with a solid color wire. I assume those are the shielded wire from the RCA.

Then I see the signal negatives (FR-, FL-, RR-, RL-) which I assume are the ground wires off each RCA. These are the ones labelled GRAY/BLACK, PURPLE/BLACK etc right? Just want to make sure I put them in the connector right the first time!

I've wired up plenty of stereos and amps in my time, but never made my own harness!

Yes, refer back to this post: Nakamichi Update - '99 LX 470

Since I could not simply de-pin the Metra adapter and slide those terminals into the Toyota connector, I had to get busy cutting and splicing.

I am glad I got that Metra adapter from Crutchfield, because it gave me color coded RCA wiring to go from the Pioneer pre-amp outputs into the factory wriring.

In the next picture you can see how they used a common ground for the Toyota ampifier. The Nakamichi does not. I had to take that common ground apart and give each one a terminal. Not sure if everyone knows, but with RCA wires, it is the outer conductor that is the ground.

The last picture shows how the crimps in the Metra piece were not all that great. I did not have any problems (other than $) with the Toyota repair terminals. If you get your own terminals, make sure you have a good set of crimpers!

View attachment 1734397 View attachment 1734398 View attachment 1734399 View attachment 1734400

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I wouldn't say that the pins don't work, but you'd have to find a crimper that doesn't "flatten" the crimp area making it too wide to fit in the connector. After trying 3 different recommended crimpers, I gave up, as the multiple crimper cost was approaching the repair wire cost.

I can second this. I bought some crimpers on Amazon that looked like they might actually work. The crimps looked really good, but they flattened out too much to fit in the connector. My local dealer wants $10 each plus tax, but they sometimes give me a deal. Online is $5.85 each but they want $14 for shipping.

Ultimately I don't ever want to mess with the connector piece again, and I know the toyota wires aren't going to come loose, so I will just go with those.
 
If anyone wants the leftover crimping ends then let me know and I will ship them to you. I have 36 left, which is enough to do two harnesses. Just send me a PM.

Screenshot 2020-11-07 154938.webp
 
Someone could probably make some money doing this if they got the parts and had a good crimper. From what I can tell it's minimum $45 for a crimper that will work, plus $15 for the crimping ends, $8 for the metra harness and $10 for the connector. That's $80, and that's the absolute cheapest. If you bought bulk wire and a ton of connectors you could probably put these together pretty cheap and pretty fast.
 
Since I committed to buying these repair wires, I called up the parts manager at my dealer. They wanted $9.80 each, but sold them to me for $6.35 or something like that.

Considering online they were $5.85, plus shipping, plus a pretty long wait, I felt it was worth it to go through the dealer. Still can't believe this is going to cost $100+ just for the harness adapter! I guess that's what I get for refusing to cut the factory harness! :confused:
 
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Since I committed to buying these repair wires, I called up the parts manager at my dealer. They wanted $9.80 each, but sold them to me for $6.35 or something like that.

Considering online they were $5.85, plus shipping, plus a pretty long wait, I felt it was worth it to go through the dealer. Still can't believe this is going to cost $100+ just for the harness adapter! I guess that's what I get for refusing to cut the factory harness! :confused:
I don’t think you should include the cost of crumpets, since those can be used in other projects.
 
I don’t think you should include the cost of crumpets, since those can be used in other projects.

That's true, but I can't think of any project I would personally do that would need any of this stuff...
 
Just finished my install. Thanks for all the tips and wiring diagrams. Special thanks to @dbfw for the connector!

Just to add my two cents...
The install was kind of a PITA due to the use of the RCA pre-outs, HDMI, USB and the size of my unit. It was a tight fit, but I made it work. I also picked up some 1/4" spacers and some longer bolts. I used the trim kit from Amazon and when I put it all together with the spacers it fit perfectly. The spacers seem to put it out just enough to where it sits just right. It does slide left or right a few mm or so, but only if you actually move it with your hands, which is basically the same fit as any other trim kit I have ever installed.

I did use the repair wire from Toyota which just pisses me off that they charge so much some stupid wire, but at the end of the day i didn't want a set of crimpers that I would never use again and I didn't want to cut the factory harness.

Oh, and tying in the hand brake wire to the stereo required removal of the front seat. I didn't disconnect it. i just slid it back, careful to not put any weight on the heater core that sits under there.

PXL_20201122_064854543.jpg
 
did anyone examine the male connector closely for a different part number? It might be down inside where the male pins penetrate, or the backside in tiny numbers?

It has to be out there for a lot less money.
same with the terminals. they should be less than .15$ or so.

if someone wants to send me the male I'll find it for less. Or die trying.
if you want to send me terminals I'll crimp them for you with wire for way less than Toyotas money
IF i find the manufacture # of the connector and terminals to match I'd make them for cost plus shipping and a dollar each. Different colors also.

I've combed through the yaziki and sumitomo catalogs and can't find it. That beaver place isn't helpful since they don't' give you the brand or the part number. I was assuming it was sumi but I don't know that I'd bet on it. IF it was a TE connector, amp, or tyco you wouldn't be putting in TS terminals, so I'm not really sure.
It's sometimes hard to find the discontinued connector catalogs also. It is not in the TS catalog for sumi. Even the ts050 is odd.

anyway. The option is there if someone wants.
 
did anyone examine the male connector closely for a different part number? It might be down inside where the male pins penetrate, or the backside in tiny numbers?

It has to be out there for a lot less money.
same with the terminals. they should be less than .15$ or so.

if someone wants to send me the male I'll find it for less. Or die trying.
if you want to send me terminals I'll crimp them for you with wire for way less than Toyotas money
IF i find the manufacture # of the connector and terminals to match I'd make them for cost plus shipping and a dollar each. Different colors also.

I've combed through the yaziki and sumitomo catalogs and can't find it. That beaver place isn't helpful since they don't' give you the brand or the part number. I was assuming it was sumi but I don't know that I'd bet on it. IF it was a TE connector, amp, or tyco you wouldn't be putting in TS terminals, so I'm not really sure.
It's sometimes hard to find the discontinued connector catalogs also. It is not in the TS catalog for sumi. Even the ts050 is odd.

anyway. The option is there if someone wants.
I've got a couple extra male connectors. PM me your address and I'll mail them to you.
 
did anyone examine the male connector closely for a different part number? It might be down inside where the male pins penetrate, or the backside in tiny numbers?

It has to be out there for a lot less money.
same with the terminals. they should be less than .15$ or so.

if someone wants to send me the male I'll find it for less. Or die trying.
if you want to send me terminals I'll crimp them for you with wire for way less than Toyotas money
IF i find the manufacture # of the connector and terminals to match I'd make them for cost plus shipping and a dollar each. Different colors also.

I've combed through the yaziki and sumitomo catalogs and can't find it. That beaver place isn't helpful since they don't' give you the brand or the part number. I was assuming it was sumi but I don't know that I'd bet on it. IF it was a TE connector, amp, or tyco you wouldn't be putting in TS terminals, so I'm not really sure.
It's sometimes hard to find the discontinued connector catalogs also. It is not in the TS catalog for sumi. Even the ts050 is odd.

anyway. The option is there if someone wants.

Even with magnification and bright lights, I can't seem to find any marking in/on/around the 90980-11503 connector housing.
 
figures. That's been a long shot for me. It works sometimes.


These terminal #s are correct, I think they were already listed but you can find them cheaper this way instead of going back to corsa.

male repair wire 82998-12410
female repair wire 82998-12420

TERMINALS
male
yaz # 7114-1257
sumi# 1500-0181

female
yaz # 7116-1257
Sumi# 8100-0544


3305 is the sargent crimper listed. I'm sure the other cheaper one is fine also. To be honest any crimper that's not to narrow and not too wide and has ranges of 1-2.3mm would be fine.

im still looking for the male free hanging manufacturer.
 
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Did my install today. Halfway through I tested the harness and all powered up and sounded okay. Wired up my USB plug to replace the cigarette lighter, put everything back together, and now there’s no power. The 20A fuse under the hood is fine and I replaced it to be sure. Tried plugging the factory head unit in and no power there either. Any thoughts on what could be causing the issue? Is there a separate fuse for the amp? It’s baffling me to no end.
 
Did my install today. Halfway through I tested the harness and all powered up and sounded okay. Wired up my USB plug to replace the cigarette lighter, put everything back together, and now there’s no power. The 20A fuse under the hood is fine and I replaced it to be sure. Tried plugging the factory head unit in and no power there either. Any thoughts on what could be causing the issue? Is there a separate fuse for the amp? It’s baffling me to no end.
No power to the head unit, or no sound from the speakers? If the head unit powers up, but no output, I'd check the connection of the amp turn on wire, pin 14 on the connector.

Do you have a multimeter? If so, you should be able to check for constant +12v at pin 1 and switched +12v at pin 10 as well. The hardest part of the install for me was cramming the connector and all the wiring behind the new head unit, so I'd be suspecting something got pulled out of a connector, or a live wire shorted to ground somewhere.
 
No power to the head unit, or no sound from the speakers? If the head unit powers up, but no output, I'd check the connection of the amp turn on wire, pin 14 on the connector.

Do you have a multimeter? If so, you should be able to check for constant +12v at pin 1 and switched +12v at pin 10 as well. The hardest part of the install for me was cramming the connector and all the wiring behind the new head unit, so I'd be suspecting something got pulled out of a connector, or a live wire shorted to ground somewhere.
No power at all. Both the aftermarket and factory units
 
No power at all. Both the aftermarket and factory units
Hmm, I'll try to take a look at my '99 FSM tonight and see if there are any other fuses. If that last thing you touched was the USB, maybe re-trace those steps to see if anything else got disturbed? Did you replace the lighter socket with one of the pre-wired USB sockets that plugs into the back of the head unit? Did you just unplug the original power connector from the back of the cigarette lighter when you removed it, or cut it?
 

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