Switch #2 (part 19 in exploded diagram) is faulty: it lights up the surface unit indicator-light 24/7, despite being in the off position.
The red nodes in the following diagram are wiring disconnects. The test: all nodes were disconnected and then each node was individual tested. Switch #2 is delivers power to the indicator 24/7. All other switches would would only turn the indicator on when they were NOT in the off position.
An identical good stove's surface-unit indicator only turns on when any of the four switches are not in the off position. After cooking is completed and the switches are all off, the indicator goes dark.
Based on testing, a switch that is NOT off is designed to power the SURFACE-UNIT indicators light.
What causes this failure mode (i.e. short)? I ask because I would like to know if there is a simple fix that does not involve replacing the switch.
Switch Description: https://www.amazon.com/Replacing-Range-Infinite-Switch-WB24T10029/dp/B01N5EOYJI/