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Rear view wiring method introduction

Leo

Rear View Wiring Instructions

Basic Wiring Diagram

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Wiring Method Using Harness Without CANBUS Box is Shown Below:

📌 Wiring Instructions (Using Harness Without CANBUS Box)

1. Main Unit Harness (Left Side):

Pin 5 on the G-connector is the reverse trigger input pin.
When it receives a 12V signal, the head unit will automatically switch to the rearview display.

2. Reverse Camera Cable – Front End:

A green wire (sometimes red or pink depending on your actual harness), labeled Reverse trigger wire, should be connected to Pin 5.
This wire receives power from the reverse light when the car is in reverse gear, triggering the head unit to switch the display.

3. Head Unit Plug:

The plug labeled Connect to the 10-Pin port is used for connecting to the 10-pin interface of the head unit, transmitting the video signal from the camera.

4. Camera Power Cable:

The red power wire of the camera should be connected to the positive terminal of the reverse light. The black wire (ground) is typically left unconnected.
When reversing, the reverse light powers on, sending 12V through the red wire all the way to the front trigger wire (green/red/pink), and into Pin 5 of the head unit — completing the automatic switch to rearview.

5. Camera Video Cable:

The camera’s video signal is transmitted via a yellow RCA connector, which connects to the video input of the head unit, ensuring live image display on screen.

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Wiring Instructions for Each Component

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🔹 Head Unit Harness (Left Side) – Pin 5:

Pin 5 is the reverse trigger input of the head unit. When it receives a 12V signal, the head unit automatically switches to the rearview camera interface.

✅ Note:
Although the system uses CANBUS to control reverse switching, the CANBUS box actually sends a 12V signal to Pin 5 when the car is shifted into reverse, triggering the head unit to switch to rearview mode.

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🔹 Camera Power Cable:

The red power wire of the camera does not need to be connected elsewhere, but it must be taped securely with electrical tape to prevent it from touching the black wire and causing a short circuit.

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🔹 Reverse Trigger Wire (Connect to Pin 5):

The green wire from the front part of the camera cable (sometimes red or pink) should be connected to the Pin 5 wire of the head unit harness. This wire receives the 12V reverse signal from the CANBUS box.

✅ Note:
This connection not only triggers the head unit to switch views but also allows the camera to receive power only when reversing, improving safety and extending lifespan.

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🔹 Video Cable:

The video signal from the camera is transmitted through the yellow RCA connector to the head unit’s video input for display.

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🔁 Summary

✅ The CANBUS box outputs 12V to Pin 5 to trigger rearview switching.
✅ Camera power is synchronized with the reverse signal through Pin 5.
✅ Unused red/black wires should be insulated to avoid short circuits.
✅ Video is transmitted via yellow RCA cable.

Leo

Rearview Wiring Video Tutorial
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MasterBlaster

Hello,

I purchased this head unit [Login to see the link] off of Amazon and have the unit working as expected other than the factory rear camera. I have connected the rear camera RCA cable (as a part of the delivered cable harness C) to the head unit female RCA cable (plugged into the back of the head unit) but the camera does not trigger when the car is in reverse. My car is a 2008 toyota highlander hybrid with JBL. Any help in getting this resolved is greatly appreciated.

Thank you

Leo

MasterBlaster
Hi MasterBlaster,

Thank you for your detailed message!

Based on your description, it seems the issue might be related to the wiring harness. To better assist you, could you please help confirm the following two points:

Did your factory rear camera originally display on the upper small screen or on the lower center console screen?
Is the wiring harness you received labeled with the code XC-1380?

Once we have this information, we’ll be able to provide you with more accurate troubleshooting steps.

Best regards,
Leo

MasterBlaster

Leo ,

I apologize for the extremely slow response, I never got the notification of your reply.

To answer your questions:

The rear view camera image was provided on the original head unit that this unit replaces, i.e. the large screen
I utilized the XC-1380 cable assy to install the unit and everything is connected from what I can tell. The factory camera was working before the replacement, at this time I don’t have reason to believe it does not still operate

Thank you so much for the support, I really appreciate it.

Leo

MasterBlaster
Hello, thank you for your reply and the detailed explanation!

Since your current XC-1380 harness doesn’t trigger the rear-view image when shifting into reverse, it’s likely that the issue lies with the harness itself.

Our initial assessment is as follows:
Your original factory camera appears to operate on a 6V signal, whereas our head unit requires a 12V trigger to activate the rear camera display. It’s possible that the voltage step-down module in the harness is malfunctioning, preventing proper signal recognition.

To resolve this, please contact us at [Login to see the link] — we’d be happy to send you a replacement harness free of charge.

Thank you again for your valuable feedback and patience. We’re committed to helping you get this resolved!

MasterBlaster

Thank you for the very quick response. I’ll contact via the email address shortly.

Thank you again