# What can I possibly be doing wrong

**URL:** <https://forum.ewelink.cc/t/what-can-i-possibly-be-doing-wrong/1020>\
**Category:** Uncategorized\
**Created:** [June 2, 2022, 1:19am UTC](https://forum.ewelink.cc/t/what-can-i-possibly-be-doing-wrong/1020 "2022-06-02T01:19:04Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![lifeschase](https://avatars.discourse-cdn.com/v4/letter/l/bc8723/32.png) [@lifeschase](https://forum.ewelink.cc/u/lifeschase)\
**Post date:** [June 2, 2022, 1:19am UTC](https://forum.ewelink.cc/t/what-can-i-possibly-be-doing-wrong/1020/1 "2022-06-02T01:19:04Z")

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Hello everyone,

I am new here. I just purchased 4 of these sonoff wifi switches.

I tried all the switches.

I installed the app…  
got the switches to link…  
upgraded the firmware

Tried a simple 12v light and nothing.

Black— Common  
Red to NC but I tried normally open.

All the lights light up and I here a click with I click the app button but no light.

I tried a voltmeter and no power at the connection point?

 ![IMG_8627](https://europe1.discourse-cdn.com/flex005/uploads/ewelinkforum/original/1X/79ac4abaf2672a5148c28c6294b8d02e62d6b6f2.jpeg)

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<div class="post-metadata">

**Author:** ![akikiki](https://dub1.discourse-cdn.com/flex005/user_avatar/forum.ewelink.cc/akikiki/32/568_2.png) [@akikiki](https://forum.ewelink.cc/u/akikiki)\
**Post date:** [June 9, 2022, 3:34am UTC](https://forum.ewelink.cc/t/what-can-i-possibly-be-doing-wrong/1020/2 "2022-06-09T03:34:20Z")

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Is that the Sonoff SV switch? I think it is. Isn’t the SV switch simply a Dry Relay? For like using on a garage door opener? Its not suppose to have power coming off it.

Know how to test it? Use your multimeter, but check it as a on/off switch. Check it for continuity, not power.