Quote:
Originally Posted by TheQ
Cavie, OK I understand the 12V, 3 terminals but not the last part. Can you clarify? Thx.
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An unlighted switch is just 2 wires in this application (SPST). Positive wire coming in, and wire going to heating pad.
A lighted switch needs 3 wires - adding a negative/ground to complete the circuit for LED...
If a negative wire isn’t present, would need to run one... but assuming your switches are part of the control panel, I’m sure there is a negative/ground wire you can use.