3 Channel Monitors: Installation

Updated October 06, 2026 20:27

The 5” Monitor [PM-1960S] and 7” Monitor [PM-1970S] are 3-channel HD LCDs with button controls and a built-in speaker. This article details the recommended process to install these devices.

Mounting

To select a monitor mounting location, consider in which vehicle cabin areas the device could be fully in the driver’s view (and within reach, if possible) without obstructing the vehicle’s operation or systems.

Select a Monitor Mount

Once a mounting location is selected, consider which type of mount best fits the location, vehicle, and driver needs. There are four (4) to consider:

Included Mounts

U Mount: works best on a surface parallel to the road (like a dashboard or ceiling). It's a sturdy mount that only allows up/down screen adjustments, leaving the monitor's back unobstructed.
Fan Mount: can rotate from front to back, tilt left to right, and mount to the vehicle using hardware or adhesive.

Optional Mounts

Pedestal Mount: a flexible 6" pedestal with a smaller mounting surface and longer reach.
Rearview Mirror Mount: replaces a vehicle's rearview mirror with a monitor by slotting into the vehicle's original rearview mirror mount.

Mount the Monitor

With a U, Fan, or Pedestal Mount

Verify and mark the selected mounting location.
1. Temporarily attach the monitor to the selected mount.
  - U Mount:
    1. Attach the monitor to the bracket with the four (4) thumb screws to the monitor’s sides.
    2. Tighten the screws when the monitor is in the desired position.
    3. The bracket is reversible if more adjustment is needed.
  - Fan & Pedestal Mount:
    1. Slide the mounts t-nut into the slot at the monitor’s rear.
    2. Tighten the large plastic screw to hold the bracket to the monitor.
2. Hold the monitor and its mount to the selected location.
3. Verify that the device will not obstruct driver operation.
4. Determine how the monitor’s harness will be secured and routed.
5. Verify there is sufficient clearance on and/or behind the selected location for the monitor’s harness.
6. Mark the mount’s notches on the vehicle body.
Remove the monitor from its bracket.
Determine which mounting style would work best for the vehicle’s surface.
1. Adhesive can be used on a windshield or other smooth surface and is the recommended method when drilling is not an option.
2. Self-drilling hardware is best for thick plastic and metal surfaces.
3. Nuts, bolts, and washers should be used on less solid mounting surfaces.
Install the mount with the selected hardware.
- If using an adhesive:
  1. Clean and dry the mounting surface.
  2. Spray 70% Isopropyl Alcohol or swab the area with an alcohol prep pad.
  3. Dry the surface to remove any residue.
  4. Remove the adhesive backing from the mount and align it with the marked location.
  5. Firmly press in place for 30 seconds.
  6. Allow the adhesive to cure for at least one (1) hour before attaching the monitor for best results.
- If routing the harness into the vehicle body:
  1. Approximately 1.5” from where the mount will be installed, mark, verify clearance, and drill the harness routing hole.
  2. Install a grommet through the routing hole to prevent damaging the cable.
  3. Ensure there is sufficient slack on the cable to connect the harness to the monitor and adjust the monitor’s angle.
Mount the monitor.
1. Loosely attach the monitor to its mount as described in step 1a.
2. Check the view of the monitor from the driver’s seat and make any necessary monitor angle adjustments.
3. Tighten the thumb screws to secure the monitor.

With a rearview mirror mount

Locate the vehicle’s rearview mirror mount and remove the mirror if necessary.
Select a nearby location where the monitor’s harness can be secured, considering the required cable routing from the harness to the monitor, and cameras and trigger wires to the harness.
Disassemble the rearview mirror mount.
1. Remove the screw on the mount’s base and the metal piece that the screw held in place.
2. Set both pieces aside.
Mount the monitor.
1. Slide the mount’s t-nut into the slot at the monitor’s rear.
2. Tighten the large plastic nut at the mount’s top.
3. Slide the mount into the vehicle’s rearview mirror mounting base.
Check for any necessary adjustments.
1. View the monitor from the driver’s seat.
2. Determine whether the view is clear or if the monitor should be slid upwards, downwards, or tilted.
Unmount and adjust the monitor’s mount as needed.
1. The rearview mirror mount has a ball joint that allows it to adjust to a different angle. Given that the mount must be stable, it takes considerable force to adjust the joint.
Remount the monitor and secure it in place.
1. Repeat the adjustment process as many times as necessary until the desired view is achieved.
2. Secure the mount to the vehicle with the screw removed in step 3.

Camera Connections

Standard Camera Connections

The 3-Channel monitor is typically connected to two (2) side cameras and one (1) rear camera, providing drivers with increased visibility into the vehicle’s rear and side blind spots. Each camera connector on the monitor’s harness is color-coded, and each connector has a corresponding trigger wire.

Connect each camera, or its A/V extension cable, to the corresponding camera input on the monitor harness. Ensure the camera’s cables are all properly routed and secured before connecting them.

Connect the driver side camera to the harness white CAM 1.
Connect the passenger side camera to the harness blue CAM 2.
Connect the rear camera to the harness brown CAM 3.

"Hazards" Camera Connections

While 3-Channel monitors are typically single-screen displays, they can be installed and configured to display both side cameras simultaneously in a split-screen view, output from a Ranger DVR or Multiplexer. This split-screen view should be configured to trigger when the vehicle’s hazards are activated once installation is complete.

However, because this split-screen output connects to the monitor’s CAM 3, this configuration would prevent a rear camera from being connected to and displayed on the 3-Channel monitor.

With a Ranger DVR

As its primary function is recording, the Ranger DVR needs an additional output cable and must be configured to display the desired cameras on the monitor. For the cable, two options are available: an HDMI to AHD adapter (high-definition, pictured in the diagram below) and the DVR to Monitor Interface Cable (standard-definition).

Ensure the camera’s cables are all properly routed and secured before connecting them.

Connect the driver side camera to the white CAM 1.
Connect the passenger side camera to the harness blue CAM 2.
Connect the Ranger’s output adapter.
- With a HDMI to AHD Adapter:
  1. Connect an HDMI cable to the “HDMI Out” port on the Ranger DVR.
  2. Connect the other end of the HDMI to the “HDMI In” port on the adapter.
- With a DVR to Monitor Interface Cable:
  1. Connect the four-pin end of the cable to the “SD Out” port on the Ranger DVR.
Connect the “AHD Out” camera connector to the harness brown CAM 3.

To view the desired split-screen output from the Ranger, it must be configured on the device’s” display configurations” through its web interface. For detailed instructions, see Ranger DVR: Configure the Displayed Output.

With a Multiplexer

The multiplexer is a simple device which takes the input of its connected cameras and outputs them in a single view.

Ensure the camera’s cables are all properly routed and secured before connecting them.

Connect the driver side camera to the white CAM 1.
Connect the passenger side camera to the harness blue CAM 2.
Connect the multiplexer’s “Video Out” cable to the harness brown CAM 3.

For a 4-Channel Multiplexer

If the installed multiplexer is a 4-Channel device, some minor configuration is required to view the desired split-screen output. This should be done once installation is complete:

Power the vehicle’s ignition and wait for the lights on the device’s front to be lit, matching the number of cameras connected to the device.
Press and hold the “SET VIEW” button for five (5) seconds and release.

Power & Trigger Wiring

The monitor’s harness features all of the monitor’s connections: three (3) camera connectors, three (3) trigger signal wires, and two (2) power wires. Complete the monitor’s power, camera, and signal connections before securing the harness.

Power Wiring

The harness’s power wires connect to the vehicle's ignition and ground circuits to provide power to the monitor. When selecting these circuits, consider:

Warnings & Recommendations

Poor connections or improper voltage will result in a non-functional or improperly operational device.
Connecting to an occupied circuit may generate interference and affect image quality.
If other Pro-Vision equipment is installed, all ground leads should be on the same circuit to eliminate system ground loops.
Use 16 AWG wire of the appropriate color to extend the connection as needed.

Locate the vehicle’s ignition (or accessory) power and chassis ground circuits.
- Use a digital multimeter to verify that the circuits have the desired voltage.
  1. The ignition circuit should read +12 to +24 Vdc.
  2. The ground circuit should read 0 Vdc.
Connect the red 3 A fuse holder to the ignition circuit.
1. If the monitor’s fuse holder is in-line on the power harness, and the connection must be extended to reach the mounting location, cut the fuse holder off the h arness, leaving enough space at both ends to reconnect it.
Connect the monitor’s red power wire to the red 3 A fuse holder.
Connect the monitor’s black ground wire to the vehicle’s ground.

Trigger Wiring

The monitor’s trigger wires can be connected to vehicle signal circuits, allowing the device to automatically display the camera corresponding to the driver’s actions. For example, setting the vehicle in reverse can trigger the rear camera to display. To locate the desired vehicle circuits:

Warnings & Recommendations

Test their signal with a digital multimeter. Testing should be done while the motor is running, as circuits behave differently between full and accessory power.
Verify there is only voltage in the located circuit while running the desired signal.
Use 16 AWG extension wire of the appropriate color to extend the connection as needed.

Turn Signal Triggers

Locate the vehicle’s turn signal wires.
1. Each wire should provide voltage only when the vehicle’s respective turn signal is active.
2. This may be an alternating or constant signal.
Connect the white CAM 1 trigger to the vehicle’s driver (left) turn signal circuit.
Connect the blue CAM 2 trigger to the vehicle’s passenger (right) turn signal circuit.

Reverse Signal Triggers (Standard Installation)

No brown trigger wire connection is required for the hazard configuration installation.

Locate the vehicle’s reverse signal wire.
1. This must be a constant signal.
2. Verify that the located circuit is not the brake light signal, which is often confused with the reverse signal.
Connect the brown CAM 3 trigger to the vehicle's reverse signal circuit.