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Skutt PK kilns and the KM-1 wall mount controllers both use a small signal relay to drive their main relays/contactors.
The small red wires lead from the computer control board to the pilot relay and then a second set of wires lead to the main relay/contactor.
If you are testing your kiln and do not have voltage at the element pigtials with the kiln running, either the main relay/contactor could be bad or the small pilot relay could be bad.
KM1227PK Single Phase and Three Phase
KM1231PK Single Phase and Three Phase
KM1627PK LF Single Phase and Three Phase
KM1627PK Single Phase and Three Phase
KM1 Wall Mounted Controller - Three Phase - Wiring Diagram
KM1 Wall Mounted Controller - Single Phase - Wiring Diagram