Refer to the schematic on this forum post: https://www.norduserforum.com/general-no... https://www.norduserforum.com/download/f...

Note that the sustain pedal has four positions and the corresponding four resistors are connected in parallel to encode the pedal position. Similarly, the sostenuto and soft pedal share the ring connection.

Use your multimeter in the ohms setting to measure the resistance at the plug between the sleeve and the tip, and the sleeve and the ring. Depress the pedals in turn and in combination to verify the resistances.

The damper pedal uses the TIP connection:

Damper 1: 10K Ω (lightest pressure)

Damper 2: 3.2K Ω

Damper 3: 1.3K Ω

Damper 4: 500K Ω (strongest pressure)