Power source
Wakespeed WS500 Alternator Regulator field-control connections
Identify the regulator's field-control interface and review its manufacturer harness requirements. The charging power circuit needs the selected alternator, battery and protection before it can be drawn.
- Nominal voltage
- 12 V
- Compatible systems
- 12 V / 24 V / 48 V
- Continuous draw
- 0.5 A
Connection overview
Field-control view for the WS500 Regulator.
Field control is separate from alternator charging output. The view below leaves the power, ground, sensing and charge-stop harness for the complete model-specific installation.
Installation notes
Before you install.
Open a question for model-specific guidance and sources.
Verified against the manufacturer's documentation, checked 2026-09-30. Manufacturer documentation →
Which WS500 and harness are required?
This entry represents the standard WS500, which uses USB configuration. Bluetooth belongs to WS500 Pro, although both share the product manual. Both regulate alternator field current; the main charging cable runs directly from the alternator to the protected battery circuit.
The alternator must support external regulation. Match the separately supplied harness to its field polarity: PH for positive field/B-type, or NH for negative field/A-type. Disable the alternator's internal regulator as required by its manufacturer. A lithium battery also needs a compatible BMS control arrangement and charging configuration; selecting a lithium preset alone does not establish that integration.
What do the three drawn terminals leave out?
BAT V+, BAT GND and Field are a simplified representation. The real harness separates power, battery voltage sensing, current sensing, ignition enable, temperature sensors and optional control signals. In particular, BAT V+ is not a substitute for the separate fused positive sense lead.
The standard harness instructions, pages 4–6, specify:
- Red power: alternator B+ or the system positive bus, with a 10 A fuse; the text specifies 15 A for an extra-large-case alternator. Black power returns to alternator ground or the system ground bus.
- Red/yellow voltage sense: the charging side of the main battery fuse, protected by a separate 3 A fuse. Black/yellow senses battery negative at the bank's system-ground connection.
- Blue field and brown enable: field polarity follows the harness; the brown ignition lead enables regulation from a switched engine-running supply.
- Current feedback: the default shunt is 500 A/50 mV. Follow the diagram for the purple and grey sense connections and the chosen positive- or negative-side shunt position.
The VAN harness combines connections differently; its example on page 8 shows a 15 A supply fuse. Page 7 requires its combined red/black leads to connect directly at the main battery busbars without extension; use a standard harness if those leads need extending. Use the diagram for the actual harness and battery/BMS arrangement. Crimp's 0.5 A draw is a planning allowance, not the field-current supply requirement; its automatic cable example does not represent this complete harness.
What needs checking during commissioning?
Fit the alternator temperature sensor and any battery temperature sensor required by the configuration. Select charging limits for the actual battery, alternator and belt drive. CAN uses the enclosure's RJ45 connectors with suitable cabling and termination; the connector shape does not imply Ethernet compatibility. See pages 15–16 and Wakespeed's battery-specific configuration guidance before enabling charging.
Fit check
Connect it to the rest of your system.
Describe your setup to draft a system with WS500 connected. Review the selected parts and cable lengths, then edit the diagram in Crimp.
The model only picks parts and draws the connections. Every wire size and fuse rating still comes from Crimp's own sizing, never from the model.
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Technical reference
Specifications and terminal map.
Check the model, ratings and connection points against your own unit before choosing installation hardware.
Catalog specification
External alternator regulator for 12V, 24V and 48V lead-acid or lithium systems. Uses voltage, current and temperature feedback with J1939 CAN integration. Match the separately supplied harness to positive or negative field control. The standard WS500 uses USB configuration; Bluetooth requires WS500 Pro. Main charging current bypasses the regulator.
- Nominal voltage
- 12 V
- Compatible systems
- 12 V / 24 V / 48 V
- Continuous draw
- 0.5 A
Terminal map
Catalog connection points, current direction and planning limits. Check the manufacturer's pinout and connector ratings before installation.
BAT V+
positive · input
BAT GND
ground · input
Field
signal · output
Sources and sizing method
Equipment specifications. Model details, ratings and terminal roles come from the catalog. Check your unit’s label and current manufacturer documentation for its exact revision.
Connection overview. This diagram explains the connection arrangement; it does not calculate cable sizes or protection for the installation. Follow the manufacturer’s complete wiring and protection instructions.
Read how the sizing worksNext step
Plan your installation with WS500 Regulator.
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