(Note: Always disconnect the vehicle’s main battery pack before starting any electrical installation.) Typical Terminal Designations
The Digital Instrumentation Model 3501 Datasheet details the hardware's robust design for harsh environments: curtis 3501 manual
A unique failure detailed in the Curtis 3501 manual is the "flat spot" – a range of pedal travel where output voltage does not change. This occurs when the wiper rests on a worn section of the resistive element, typically at the most common cruising throttle position. The only permanent fix is replacement; the manual explicitly advises against attempting to repair the resistive track. (Note: Always disconnect the vehicle’s main battery pack
: Tied internally for localized network bus termination. : Tied internally for localized network bus termination
| Symptom | Likely Cause | Manual Solution | | :--- | :--- | :--- | | Vehicle moves at idle | Idle voltage too high (>1.0V) | Adjust linkage to create more slack; recalibrate | | Jerky acceleration | Worn wiper or dirty resistive track | Clean with contact cleaner (non-lubricating) or replace | | No throttle response | Open circuit in potentiometer | Measure total resistance; if infinite, replace unit | | Intermittent operation | Loose crimp pins in connector | Re-pin connector per manual wiring diagram | | Mechanical binding | Foreign debris or bent shaft | Remove, clean, and lubricate shaft bushing sparingly |