The reason for the above post is, once I receive a new switch and install it, I cannot return it if it does not fix the problem. I’d like to do a continuity check on the old switch before I order the new switch.
With the dishwasher unplugged, disconnect at least one wire from the AP3782822 (Bosch 00424410) On/Off switch to isolate it before testing.
Set your multimeter to continuity or the lowest Ohms (Ω) setting, then test these terminal pairs:
Pins 1 & 2: Main switch contacts. They should change from OL (open) to 0–1 Ω (closed) when the button is pressed.
Pins 3 & 4: Second set of switch contacts. These should also change state when the button is pressed.
Pins 5 & 6: Reset/control contacts. On some versions, these only close momentarily as the button is operated, so they may not behave like a standard latching switch.
If any pair that should change state always reads OL or always shows continuity, the switch has failed and should be replaced.
If the terminal numbers aren’t visible, upload a clear photo of the back of the switch. Bosch usually molds the pin numbers into the plastic next to each terminal, and I can point out exactly which terminals to test.