Motion detector wiring help


Old 03-21-19, 06:09 AM
Thread Starter
Join Date: Mar 2019
Location: USA
Posts: 3
Received 0 Votes on 0 Posts
Motion detector wiring help

I have two 2 bulb fluorescent fixtures that are wired to the same switch. I got three-wire motion detectors to wire into each fixture. The motion detectors are hi bay/low bay sensors that are supposed to be wired directly to each fixture. For the life of me, I can't figure out how to wire these properly. Currently, they are wired in but do not turn off with no motion.
I attached a couple pictures of one of the fixture and a wiring diagram that came from the motion sensor.

What's currently wired:
Black-sensor to black-fixture to black-ceiling
white-sensor to white-fixture to white-celing
red-sensor to red-ballast to end of bulbs. (originally, the red ballast wire ran to end of bulbs with a small wire connecting the two bulbs.

Any ideas? I tried following the diagram the best I could, a video online, and my general knowledge of circuits to wire in a switch. Can't get it to work.

Name:  fl1.jpg
Views: 44
Size:  41.9 KB

Name:  fl2.jpg
Views: 39
Size:  39.2 KB

Name:  fl3.jpg
Views: 67
Size:  47.0 KB

Last edited by PJmax; 03-21-19 at 08:51 PM. Reason: cropped/resized pictures
Sponsored Links
Old 03-21-19, 07:40 AM
Geochurchi's Avatar
Join Date: Nov 2012
Location: United States
Posts: 4,806
Received 73 Votes on 69 Posts
Hi, red sensor wire goes to the Black of the ballast, leave the Red fixture wire connected to the sockets, it does not connect to the sensor.
Black from sensor connects to the supply black only.
White supply gets connected to the white of the ballast and sensor white.
Old 03-21-19, 07:58 AM
Join Date: Sep 2002
Location: welland ontario
Posts: 7,566
Received 249 Votes on 219 Posts
Black sensor goes to black power only, not fixture black.
Red sensor goes to ballast black.
White goes the ballast and power white.

Hopefully your sensor was not burnt out by connecting to the ballast red.
Old 03-21-19, 08:04 AM
Thread Starter
Join Date: Mar 2019
Location: USA
Posts: 3
Received 0 Votes on 0 Posts
Thanks guys. I'll have to try this later this evening. I don't think the sensors are burned out. They've still been trying to switch.
Old 03-21-19, 08:53 PM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Northern NJ - USA
Posts: 59,170
Received 1,116 Votes on 1,036 Posts
Your sensors use a relay. They'll be fine. It's your ballast that may be fried.
They don't like to see 120v on the red tube wire.
Old 03-22-19, 07:19 AM
Thread Starter
Join Date: Mar 2019
Location: USA
Posts: 3
Received 0 Votes on 0 Posts
I tried rewiring it as yall described. As i was rewiring it, I realized this was what i tried first. It still wouldn't work. I took out the sensors and plan on doing something else. Probably just additional lights with built in sensors.

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Thread Tools
Search this Thread
Ask a Question
Question Title:
Your question will be posted in: