 Door switch, How do they work |
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| trojanhorsepower |
 Aug 5 2025, 08:59 PM
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#1
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Senior Member  Group: Members Posts: 899 Joined: 21-September 03 From: Marion, NC Member No.: 1,179 Region Association: None  |
My assumption is that when the door is closed it opens the switch, turning off the buzzer or whatever. So when the door is open (switch closed), there should be continuity between the two pins. Is this correct? I have cleaned it pretty aggressively but either can't get in there, or miss understand it.
I have pictures on my build themed, but can't add them here. I will add pics tomorrow. Thanks Peter |
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| JeffBowlsby |
Aug 5 2025, 09:37 PM
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#2
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914 Wiring Harnesses & Beekeeper Group: Members Posts: 8,997 Joined: 7-January 03 From: San Ramon CA Member No.: 104 Region Association: None 
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Some door switches are 2-pole, others are 4-pole. You might get the info you need by studying the schematics.
https://bowlsby.net/914/WiringHarnesses/#ReferenceLibrary |
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| trojanhorsepower |
Aug 6 2025, 04:22 PM
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#3
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Senior Member Group: Members Posts: 899 Joined: 21-September 03 From: Marion, NC Member No.: 1,179 Region Association: None |
Thanks Jeff,
So it appears that the terminals should have continuity between them. Do you have any pictures of the 4 pin switch? My harness has 4 terminal at the doors, but I only have this switch.  Thank you, Peter |
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| Superhawk996 |
Aug 6 2025, 06:22 PM
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#4
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914 Guru Group: Members Posts: 7,266 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch
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The switch is normally open when the door is closed (ie as you show it).
The continuity would be between the terminal and the housing that you’re holding when the door is open (ie when you release the plunger). If you measure it as you are holding it there will be no continuity between the terminal and the metal housing that you are holding. That metal housing is grounded to chassis when it’s screwed to the body. Release the plunger and you will have continuity between the terminal and the metal housing that you are holding. |
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