schematic noob (determining polarity)
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CalEditor is correct. The note in the schematic states that it is open when pressed as well.
On the boxes/ or in relays, you can tell what they are just by tracing back the wires to see where the other end goes. In this case a Fuse, then the other end the pin on the computer. If it was a ground, it would just go to a ground symbol that looks like a tv antenna.
On the boxes/ or in relays, you can tell what they are just by tracing back the wires to see where the other end goes. In this case a Fuse, then the other end the pin on the computer. If it was a ground, it would just go to a ground symbol that looks like a tv antenna.