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Since this question seems to come up quite a bit, I thought I'd make a single thread to identify common signal lines required for aftermarket NAV or camera installation for the three different factory-supplied stereo types.

Speed Sensor:

For the navigation unit it is pin 3 of connecter K6 (white wire).

K6 looks like this:



For the head unit with a separate amplifier, it is pin 4 of connecter K9 (white wire).

K9 looks like this:





For the head units with a built-in amplifier, it is pin 3 of connecter K3 (white wire).

K3 looks like this:






Reverse Indicator

For the navigation unit, it is pin 5 of connecter K6 (green wire)

Again, K6 looks like this:




For all other models, you have to use the connecter for the backup monitor in the headliner. I can’t find reference in the schematics (AP1?) but it is the green wire on this connecter:





Factory Backup Camera

For the navigation system, it is pins 21 to 24 on connecter K7

K7 looks like this:





Pin 21 is the camera’s ground.
Pin 24 is supply voltage for camera
Pin 22 is the positive lead for the video signal
Pin 23 is the negative lead for the video signal

For all other models, again you need to use the connecter for the backup monitor.

White brings ground to the camera
Black brings supply voltage to the camera
Red is video positive
Grey is video negative

I hadn’t thought of it at the time when I did my installation, but power and ground must be on this connecter. The wires left over are blue and violet. Anyone want to take their roof console down to measure out the lines?
 

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Excelent info.

I have a question though. I'm about to put in the AVN5510 for my truck (non amp, non jbl system) to replace the stock HU. It has standard 4 pairs speakers output (left/right fronts, left/right rears). However, my stock truck has 6 speakers..what will happen to the other two speakers? Will it be splice somewhere upstream in stock configuration already?
How may pair of speaker wires comes off stock HU?
 

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4 pairs come off the HU. The dash speakers are wired in parallel with the fr door speakers.
 

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Thank's buddy that was very helpful and worked perfectly, a lot easier than running it all the way to the rear light.
 

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For those with navigation units, K6 also has a red wire that is the emergency parking brake wire.
 

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Nice information.Thank's.:tu:
 

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On the standard radio, the reverse wire can be found in a gray plug with a cap in it, behind the stock radio on the loom that runs along the main dash support.

When you remove the stock radio, about 10 inches back is the harness. Taped up in a bundle is the gray plug. Just cut back the tape, and tap in to the small purple wire.

Just put in a Pioneer D3 w/Pioneer back up camera.

It is a very small purple wire. 12volt+.
 

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For all other models, again you need to use the connecter for the backup monitor.

White brings ground to the camera
Black brings switched 12v to the camera
Red is video positive
Grey is video negative

I hadn’t thought of it at the time when I did my installation, but power and ground must be on this connecter. The wires left over are blue and violet. Anyone want to take their roof console down to measure out the lines?
Blue is always on power (need to verify if it shuts off after 20 minutes)
Grey (not the grey in the video bundle of 4 wires) switched power
Violet unkown? anyone?
White w/black stripe unkown? anyone?

Can someone tell me how to verify ground? I am guessing it is on Violet or more likely White w/black stripe. I will also measure the voltage out of these wires and update this thread.

EDIT: Verified voltage on both Blue and Grey wires is 12V, regulated power for the OEM camera (5.5 - 7.05V) must come from the OEM backup monitor. I also believe the white w/black stripe is the ground since it is positioned opposite the other wires AND there is a wire (same color) in the exact same position in the harness that connects to the overhead console lights.
 

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Blue is always on power (need to verify if it shuts off after 20 minutes)
Grey (not the grey in the video bundle of 4 wires) switched power
Violet unkown? anyone?
White w/black stripe unkown? anyone?

Can someone tell me how to verify ground? I am guessing it is on Violet or more likely White w/black stripe. I will also measure the voltage out of these wires and update this thread.

EDIT: Verified voltage on both Blue and Grey wires is 12V, regulated power for the OEM camera (5.5 - 7.05V) must come from the OEM backup monitor. I also believe the white w/black stripe is the ground since it is positioned opposite the other wires AND there is a wire (same color) in the exact same position in the harness that connects to the overhead console lights.
I don't know if it's ever been figured out, but I think Violet wire would be a reverse signal, so it would turn on the little back up monitor and send regulated power to the camera in the back.
 

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Anybody have any info on the rest of the factory connector plugs? For nav units that is?

I am ditching the entire jbl system and can only find harnesses that RETAIN the jbl amp etc.

I just need info so I can cut/splice my eclipse nav unit into my truck.

Thanks.
 

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Factory Backup Camera

For the navigation system, it is pins 21 to 24 on connecter K7

K7 looks like this:





Pin 21 is the camera’s ground.
Pin 24 is supply voltage for camera
Pin 22 is the positive lead for the video signal
Pin 23 is the negative lead for the video signal

For all other models, again you need to use the connecter for the backup monitor.

White brings ground to the camera
Black brings supply voltage to the camera
Red is video positive
Grey is video negative

I hadn’t thought of it at the time when I did my installation, but power and ground must be on this connecter. The wires left over are blue and violet. Anyone want to take their roof console down to measure out the lines?
This is great and very valuable thread. Thanks for starting it, PS-RagE

I followed the above wiring scheme for dropping the video signals down from the overhead console to the K7 Mic connector on my retrofit OEM Nav unit. I was unable to get the camera to initialize or show video. I rewired new pins into the K7 connector thinking there was an issue there but no dice. The camera had been working fine previously with the smaller overhead monitor.

After replacing all my K7 pins and running test leads from front to rear of the Tundra I finally determined that my Toyota dealer pulled the black wire from the vehicle-side rear view camera harness under the bumper (!!!). I took it in to the dealer for the new tailgate right before starting this project and some fender-bender body work and hadn't noticed the backup monitor problem. I extracted the broken wire's pin from the connector and replaced it with a spare I pulled from a tailight harness I had left over from the body work. Woola. It now works exactly as Ps-RagE described (along with gbbuilders who posted the OEM Nav DIY thread).

I edited this post because in the original I had come up with a workaround that was technically incorrect where the camera negative video was tied into the camera ground. It kinda worked but not well and that's what led me to find the real culprit under the rear bumper.

Once again I've seen where I'd rather not have my Toyota dealer touch my truck as it causes more grief than good.
 

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EDIT: See two posts below for information on a more convenient location for camera connections not requiring work in the overhead of the truck.

Here is how the OHD monitor connector should be wired to drop signal down to Nav unit. For a shorter run there is a connector under the driver's side A-pillar cover that has the same circuits with the same color coding. It is one of two connectors down low right below the curtain airbag mount. The one that can be used is closer to the driver with tape wrapped up it. You won't have to mess wit the headliner that way.

Here's the diagram of how I finally got things to work after finding the broken wire in my tailgate harness:



I'm still not convinced there may be similar circuits in the unused K9 plug or in the K3 plug behind the Nav but forewent the continuity check because I already had everything set up and buttoned up.
 

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Here is how the OHD monitor connector should be wired to drop signal down to Nav unit. For a shorter run there is a connector under the driver's side A-pillar cover that has the same circuits with the same color coding. It is one of two connectors down low right below the curtain airbag mount. The one that can be used is closer to the driver with tape wrapped up it. You won't have to mess wit the headliner that way.

Here's the diagram of how I finally got things to work after finding the broken wire in my tailgate harness:



I'm still not convinced there may be similar circuits in the unused K9 plug or in the K3 plug behind the Nav but forewent the continuity check because I already had everything set up and buttoned up.
As an update to the above post, there is a connector for the rear camera harness behind the glove box. Forget the overhead or A-pillar. This new behind the glove box location would probably be the way to go. More information found here:


http://www.tundrasolutions.com/forums/tundra/131817-diy-oem-backup-camera-install-auto/#post1152435

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EDIT:

As an update, here is a summary of the 9 wires in the overhead console backup camera 10-pin connector (2007-2009):

(Originally Posted by PS-Rage):

Remember, all these are on the same connector .....

To Tailgate Camera:
Black = 6v (CA+) <-- (OR +12VDC if aftermarket Camera)
White = Ground (CGND) <-- out to Camera
Red = Center of coax (V+)
Grey = Shield of coax (V-)

From Vehicle:
Green = reverse signal
Blue is always on power (need to verify if it shuts off after 20 minutes)
Grey (not the grey in the video bundle of 4 wires ... this one under the Blue wire) switched power
Violet unkown? anyone?
White w/black stripe unkown? anyone?
 

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For those with navigation units, K6 also has a red wire that is the emergency parking brake wire.
Do you know where it should be connected and what function it is used for? I am about to start my nav install and want to know if i need to connect this line for the parking brake. Thanks.
 

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Do you know where it should be connected and what function it is used for? I am about to start my nav install and want to know if i need to connect this line for the parking brake. Thanks.
You only need worry about the K6 connector's parking brake pin (Pin 1) if you have an RSE (rear seat entertainment). That means there is a factory drop-down video monitor in the back seat area for the passengers to watch. I would assume any upgrade to Nav would not need this connection for any reason as there should be no RSE already in a non-nav vehicle. So basically you can forget about it. I just taped mine off when I did my install.

For clarification the parking brake connection is the purple wire in the following photo. Your color may vary so don't go by wire color, go by pin position in the connector. In this photo pin 1 is the one on the left. Now that you know which one it is, tie it off and forget about it.

 

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You only need worry about the K6 connector's parking brake pin (Pin 1) if you have an RSE (rear seat entertainment). That means there is a factory drop-down video monitor in the back seat area for the passengers to watch. I would assume any upgrade to Nav would not need this connection for any reason as there should be no RSE already in a non-nav vehicle. So basically you can forget about it. I just taped mine off when I did my install.

For clarification the parking brake connection is the purple wire in the following photo. Your color may vary so don't go by wire color, go by pin position in the connector. In this photo pin 1 is the one on the left. Now that you know which one it is, tie it off and forget about it.

I am looking to tap into this over head feed "K6" to wire a flip down monitor for the back seat. " basically a custom RSE." I am going to put the camera feed on SPDT switch with a dvd player in the glovebox. I am a novice but a brave one at that. :) Do I need to worry about the parking brake "green" wire or is what I am doing goin to do basically gonna bypass all that? Thanks for any help.
 
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