Connecting power to the SharpZ3 base unit - SharpZ3 | SharpOS 13.0

AutoVu SharpZ3 Deployment Guide 13.0

Applies to
SharpZ3 | SharpOS 13.0
Last updated
Content type
Guides > Deployment guides

To power the base unit, you must connect it to the vehicle’s power. The base unit requires a constant power source of 12 VDC protected with a 20A fuse.

Before you begin

To complete these steps, you need the following:
Stranded copper wire
14 AWG (red) and 14 AWG (black) for 12V power on the base unit.
Heat-shrink tubing
Required for the protection of soldered wire connections.
Ring terminal
A ring terminal with incorporated internal locking teeth is required at the chassis grounding screw location.
20A ATO/ATC in-line fuse
Required at the source of the vehicle’s 12-24V system tapping point.
Convolute wire loom
Required to protect cables from potential damage from heat or abrasion.
  • These instructions do not replace your vehicle’s owner manual. If you are unsure about your vehicle’s electrical wiring, see your owner's manual before continuing.
  • Solder your connections and protect them with heat shrink tubing.

What you should know

You can use the base unit to switch power for auxiliary devices, such as power for the tablet computer or a modem.
WARNING: Simply shutting off the main power to the base unit can corrupt the base unit and make the system inoperable. To turn on and turn off the base unit safely, the system requires an ignition signal.


  1. Connect a wire from the base unit’s positive (+) terminal, through the 20A in-line fuse, to the vehicle’s 12V power source (permanent +12V).
    • Install the fuse at the source of your vehicle’s 12V system tapping point. The base unit is already protected internally by an electronic circuit breaker.
    • If you connect the primary power lead from the battery, it must be fused within 2 inches of the battery.
  2. Label the primary wire at the fuse to help identify the circuit for future service.
  3. Run the wire to the base unit location.
    IMPORTANT: Protect the wire with a convolute wire loom and secure the loom from potential heat damage or abrasion.
  4. Connect the wire from your base unit’s GND pole to your vehicle’s chassis for grounding.
    • Ensure that the ground connection is clean and secure and that there is no paint impeding the connection.
    • Do not make the chassis ground connections at a weld point.
    • A ring terminal with incorporated internal locking teeth is required at the chassis grounding screw location. For a reliable connection, select ring terminals that are compatible with the size of the stud, screw, or bolt that will be used to attach them to the vehicle.
  5. Ensure that the power connector is securely installed in the base unit with the connector clamps engaged.
    A Negative/return/GND. Use 14 AWG (black)
    B Permanent 12V (+). Use 14 AWG (red)
    C Connector clamp
    D Wire tension clamps
  6. Strip 10 mm (⅜ in.) of insulation from the stranded copper wires.
    IMPORTANT: For a more secure connection, crimp a ferrule to the tip of each stripped wire. Use the appropriate ferrule for the wire gauge.
    WARNING: Do not lengthen any power or signal wires. If the wire you are installing is too short, replace with a new longer wire. Splices are a point of possible failure which can cause the system to malfunction.
  7. Insert the red wire into the positive (+) connector pole.
  8. Insert the black wire into the ground (GND) connector pole.