Wiring harness installation

This section will walk you through installing the wiring harness for your Altion voltage regulator. We've included a comprehensive wiring diagram, a detailed wire descriptions table, and helpful tips for a smooth and successful installation.

Understanding your wiring harness

Altion voltage regulators come with wiring harnesses designed for compatibility with your specific model. There are two main harness configurations:

Single alternator harness (standard): Suitable for systems with a single alternator. It features three sections, each with color-coded wires for easy identification.
Dual alternator harness (Altion max only): Exclusive to the Altion Max model, this extended harness is designed for systems with dual alternators. It includes two additional sections sleeved in blue and white to accommodate the second alternator and an additional battery. The wire colors within these sections match the standard harness designations, but they connect to the additional alternator and battery bank respectively.

Wiring diagram and table

Refer to the wiring diagram below for a visual representation of the single alternator harness (standard). The Altion Max uses the same wire colors and connection instructions. See the following table for a detailed breakdown of wire names, colors, and functions, which applies to both the standard and Altion Max configurations.

[diagram]

Altion Wire Name	Wiring Harness Leg	Wire Color	Requirement	Voltage	Altion Description
Ignition	Panel (Black)	Brown	Required	8-60V	Provides switched power to the Altion regulator. Connect to ignition switch, oil pressure switch, or a similar circuit active only when the engine runs. For always-on battery monitoring, connect to a positive bus bar.
Dash lamp	Panel (Black)	Orange	Optional	8-60V	Provides a ground path to activate a warning light or audible alarm in the event of a fault condition.
Charge cutoff	Panel (Black)	White	Optional	0-60V	Configurable function to stop charging when the signal line crosses 6V (trigger level adjustable).
Alternator Temp	Alternator (Green)	Gray	Required	N/A	Connects to alternator temperature sensor. Improves efficiency and protects alternator by regulating field output based on temperature. Mount on rear case or ground terminal.
Alt -	Alternator (Green)	Black	Required	N/A	Provides ground to the regulator. Connect to negative bus bar or alternator's negative ground terminal. Ensure clean connection to bare metal.
Alt +	Alternator (Green)	Red	Required	8-60V	Supplies power for the alternator field. Connect to the positive bus bar or alternator's positive output post. Fuse at 15 amps.
Field	Alternator (Green)	Blue	Required	N/A	Carries field current between the regulator and alternator. Polarity varies based on alternator type. Fuse if recommended by alternator manufacturer (common for N-type).
Stator	Alternator (Green)	Yellow	Optional	N/A	Provides signal for alternator and engine RPM. Connect to alternator's stator (AC) output or splice into the tachometer output.
Bat temp	Battery (Yellow)	Gray	Optional	N/A	Connects to battery temperature sensor. Adjusts charging voltage based on battery temperature, critical for lithium batteries in cold climates.
Bat -	Battery (Yellow)	Black w/ Yellow Stripe	Highly recommended	N/A	Improves charging accuracy by monitoring voltage at the battery's negative bus bar or terminal. Connect to the same negative terminal post as the ground cable in multi-battery setups.
Bat +	Battery (Yellow)	Red w/ Yellow Stripe	Highly recommended	8-60V	Improves charging accuracy by monitoring voltage at the battery's positive bus bar or terminal. Fuse at 3 amps. Connect to the same negative terminal post as the ground cable in multi-battery setups.
Shunt high	Battery (Yellow)	Purple	Highly recommended	N/A	Connects to the high side of a battery shunt, toward the battery. Measures current flow for charging optimization and battery health. Refer to the diagram. Minimize extension length, use twisted wire if needed.
Shunt low	Battery (Yellow)	Pink	Highly recommended	N/A	Connects to the low side of a battery shunt, toward the negative bus bar. Refer to the diagram. Minimize extension length, use twisted wire if needed.