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Wiring and Installation

basic

Overview

Connecting the HPVM or HPVM Pro to your vehicle is straightforward. This article covers all wiring connections, mounting options, and best practices for a clean, reliable installation.

Pin Connections

The HPVM uses a removable connector block on the back of the unit, making it easy to pre-wire before plugging in.

Important: The unit measures the voltage between the 12V pin and the ground pin by default. The optional fourth pin enables a second (or additional, on the Pro) independent voltage measurement point.

Wiring the Connector

The connector block slides off the unit so you can attach wires before installation:

  1. Strip approximately 6–8mm of insulation from each wire.
  2. Insert each wire into the appropriate terminal slot and tighten the retaining screw firmly.
  3. Use heat-shrink ring terminals on any bare wire ends connecting to battery posts or bus bars for a clean, corrosion-resistant finish.
  4. Once all wires are secured in the connector, plug the connector back into the unit.

Mounting Options

The HPVM and HPVM Pro include mounting tabs on both the side and bottom of the unit, giving you flexibility in placement:

  • Dash or A-pillar mount — Use the side tabs and self-tapping screws or a custom bracket.
  • Surface mount — Apply double-sided tape to the base of the unit for a temporary or semi-permanent installation.
  • Panel integration — The unit's compact footprint (71mm × 61mm × 25mm) fits into many custom panel cutouts. Choose a location where the display is clearly visible while driving. Avoid placing the unit where direct sunlight will wash out the screen.

Monitoring Multiple Voltage Sources (HPVM Pro)

The HPVM Pro supports up to four independent voltage inputs, allowing you to monitor multiple points in your electrical system simultaneously — for example, front battery, rear battery, alternator output, and amplifier supply.

  1. Connect the 12V pin to your primary voltage source (e.g., front battery or main bus bar).
  2. Connect the ground pin to chassis ground or your negative bus bar.
  3. Connect additional measurement pins to secondary, tertiary, and quaternary voltage sources as needed.
  4. The HPVM Pro displays all active channels independently, allowing real-time voltage comparison across your system.

Each channel's calibration drift can be adjusted individually in the AuralSync app.