Connecting the ignition signal to the SharpZ3 trunk 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 and ignition signal. When properly connected, the base unit is supplied with the vehicle's 12 VDC power when the ignition is on.

What you should know

You can obtain the ignition signal from the fuse box using a fuse tap adapter. Using this adapter, you can tap into the fused circuit and give a fused connection to the base unit.
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.
IMPORTANT: 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.


  1. Use a multimeter to identify the ignition signal from the fuse box:
    It should be a circuit that supplies 12V when the key is switched to the RUN position, and is off when the key is in the OFF position.
    1. With the key in the OFF position, use either a circuit tester or a volt meter to identify the fuses that are 10A or less and that do not have power.
      WARNING: Do not tap fuses that are related to the automatic braking system (ABS) or the airbags.
    2. Turn the key to the RUN position and identify which of those fuses now have power.
    3. When you have identified a suitable fuse, cycle the power to ensure that the power is on when the key is in the RUN position and off when the key is in the OFF position.
  2. Install the tap fuse adapter:
    1. Remove the ignition signal fuse from the fuse box.
    2. Insert the fuse into the fuse tap adapter.
    3. Install a 0.5A fuse in the added circuit holder.
    4. Install the fuse tap adapter into the fuse box.
  3. Connect the wire from the base unit’s IGN pole to the fuse tap adapter.
    IMPORTANT: For a more secure connection, crimp a ferrule to the tip of each stripped wire. Use the appropriate ferrule for the wire gauge.
    NOTE: The IGN pole draws negligible current. It is simply used to sense the ignition signal.
  4. Label the connections for future service.