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Allison GregorySep 10, 2025
What does Wiring Fault mean on Curtis 1204M Controller?
- DdavidmyersSep 12, 2025
A Wiring Fault on a Curtis Controller means that HPD Lockout has existed for more than 10 seconds. To resolve this, cycle KSI.

What does Wiring Fault mean on Curtis 1204M Controller?
A Wiring Fault on a Curtis Controller means that HPD Lockout has existed for more than 10 seconds. To resolve this, cycle KSI.
What causes Under Voltage Cutoff on Curtis Controller?
Under Voltage Cutoff on a Curtis Controller occurs when the battery voltage is at or below the programmed Under Voltage Cutoff threshold. To resolve this, ensure the battery voltage rises above the Under Voltage Cutback threshold.
What does Main Contactor DNC mean on Curtis Controller?
Main Contactor DNC (Did Not Close) on a Curtis Controller means that the voltage difference between KSI and the B+ busbar is less than the main contactor DNC threshold.
What to do if Curtis Controller has a Main Driver Fault?
If the Curtis Controller has a Main Driver Fault, it means the main contactor driver is broken. Replace the defective controller.
| Brand | Curtis |
|---|---|
| Model | 1204M |
| Category | Controller |
| Language | English |
Covers high and low current busbar connections and J4 connector pinout for system integration.
Explains standard wiring diagrams for active main contactor and active reverse input configurations.
Explains wiring for various throttle types, including potentiometers and voltage inputs.
Step-by-step procedure to verify correct installation before vehicle operation.
Configuration parameters for battery voltage settings, undervoltage cutback, and cutoff.
Interpreting Status LED flashes for fault code identification and troubleshooting.
Covers programmer diagnostics, fault effects, clear conditions, and the comprehensive troubleshooting chart.
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