Backup Camera Wiring Reference

This article covers wiring for RVS backup camera systems. RVS is currently transitioning from a legacy 5-pin CVBS connector system to a newer 4-pin FHD/AHD connector system. The wiring setup differs between the two, so the first step is always confirming which system you have.

How to Identify Your System

Feature	Legacy 5-Pin CVBS	New 4-Pin FHD
Flagship kit model	RVS-770613-NM	KT-770M137D or KT-770M137W
Camera connector	5-pin	4-pin
Camera resolution	Standard definition (CVBS)	Full HD (AHD 1080P)
Monitor input types	CVBS only	CVBS / AHD720P / AHD1080P
Power supply range	DC 12-24V (10-30V real)	DC 9-32V (KT-770M137D) or DC 12-24V (KT-770M137W)

If you are unsure which system you have, please check the model number on the monitor or the kit box.

Power Harness Wiring

The power harness connects the monitor to the vehicle's electrical system and controls which camera channel activates and when.

Legacy 5-Pin System (RVS-770613-NM)

Wire Color	Function
Red	Power 12V+ (connect to ignition/switched power)
Black	Ground (connect to chassis ground)
White	Channel 1 positive trigger
Brown	Channel 2 positive trigger
Blue	Channel 3 positive trigger (designated backup channel)

New 4-Pin FHD System (KT-770M137D / KT-770M137W)

Wire Color	Function
Red	Power 12-24V (connect to ignition/switched power)
Black	Ground (connect to chassis ground)
Yellow	Channel 1 positive trigger (Left)
Brown	Channel 2 positive trigger (Right)
Blue	Channel 3 positive trigger (Back/Backup)

Note: The main difference between the two systems is that the legacy system uses a White wire for Channel 1, while the new system uses a Yellow wire. Brown (CH2) and Blue (CH3) are the same across both.

Camera Cable Wiring

Legacy 5-Pin System

The camera cable uses a 5-pin connector. The individual wire functions are:

Pin	Wire Color	Function
1	Red	Power (+)
2	Yellow	Video
3	Green	Mirror / Normal Imaging
4	White	Audio
5	Black	Ground (-)

New 4-Pin FHD System

The camera cable uses a 4-pin connector. The 4-pin design carries power and video signal in a single cable.

Trigger Wire Behavior (Applies to Both Systems)

Channel 3 (Blue wire) is the designated backup channel. Connect the Blue wire to reverse power to have the backup camera activate automatically when the vehicle is put in reverse.

Other channels can be triggered the same way. For example, Channel 1 or Channel 2 can be connected to turn signal wires to activate side cameras when signaling.

Important notes about the Blue wire:

When the Blue wire is active, it takes priority over other triggers
Audio and distance grid lines are activated through the Blue wire
Menu access is disabled on Channel 3 while the Blue wire is active; switch to Channel 1 or 2 to access the menu
If you want to use multiple triggers, do not connect the Blue wire to constant power

To automatically turn on the monitor with the vehicle: Connect the Blue trigger wire and the Red power wire together, both going to ignition/switched power. This will also disable the Channel 3 menu.

Power connection tip: Always connect the Red power wire to ignition or switched accessory power, not directly to the battery. A direct battery connection will keep the camera on at all times and can drain the battery.

Common Wiring Issues

Symptom	What to Check
Monitor won't power on	Check the fuse, verify 12V+ on the Red wire, check ground connection
Blue screen / No Signal	Confirm Blue trigger wire has 12V+, check camera cable connections, verify cable is in the correct port
Backup camera doesn't activate in reverse	Confirm Blue wire is connected to a reverse power source
Camera activates when it shouldn't	Check for unintended constant power on the trigger wire
No audio	Verify the Blue wire is energized with 12V; confirm the camera has a built-in mic
Distance grid lines not showing	Connect Blue wire to reverse power; grid lines are tied to the Blue trigger

Still Need Help?

Backup Camera System Overview & Setup
Compatible Cameras for RVS Backup Systems
Monitor Shows Blue Screen or No Signal