# Cannot switch Light Channels in vehicle setup **URL:** \ **Category:** Blue Robotics Software\ **Tags:** ardusub\ **Created:** [November 8, 2024, 9:33am UTC](https://discuss.bluerobotics.com/t/cannot-switch-light-channels-in-vehicle-setup/18520 "2024-11-08T09:33:49Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![EricLiu](https://avatars.discourse-cdn.com/v4/letter/e/7c8e57/32.png) [@EricLiu](https://discuss.bluerobotics.com/u/EricLiu)\ **Post date:** [November 8, 2024, 9:33am UTC](https://discuss.bluerobotics.com/t/cannot-switch-light-channels-in-vehicle-setup/18520/1 "2024-11-08T09:33:49Z")
Hello, I got a problem after disabled the Lights 1 Channel, then I lost the options to switch back to channel 7. The lights will be turned on every time I power on the ROV, but I cannot tun on the light by joystick anymore. I have tried to reinstalled the QGroundControl software but it did not work. Do you have any suggestions for resetting the light output channels? Thanks. ![螢幕擷取畫面 2024-11-08 172751](https://us1.discourse-cdn.com/flex019/uploads/bluerobotics/original/2X/c/c007ef9a8b08ff8cc41d0b82e9a8dbe4a173f794.png) ---
**Author:** ![diveexplorer](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.bluerobotics.com/diveexplorer/32/18418_2.png) [@diveexplorer](https://discuss.bluerobotics.com/u/diveexplorer)\ **Post date:** [November 10, 2024, 12:02am UTC](https://discuss.bluerobotics.com/t/cannot-switch-light-channels-in-vehicle-setup/18520/2 "2024-11-10T00:02:28Z")
I had similar problem when I updated to the Ardusub v4.5.0. The option for lumen lights was not there any more. So I did revert the software back to Ardusub 4.1.2. All is working as it should be now. My software version. ArduSub: 4.1.2 (Stable) BlueOS: 1.3.1 QGC: v4.4.2 Ping Viewer: v2.5.1 ---
**Author:** ![EricLiu](https://avatars.discourse-cdn.com/v4/letter/e/7c8e57/32.png) [@EricLiu](https://discuss.bluerobotics.com/u/EricLiu)\ **Post date:** [November 20, 2024, 9:23am UTC](https://discuss.bluerobotics.com/t/cannot-switch-light-channels-in-vehicle-setup/18520/3 "2024-11-20T09:23:36Z")
Hi, Thanks for your suggestion. The problem was solved after I reverted the Ardusub back to 4.1.2. Yet, we are confronted with a new problem. The button assignment of the joystick went wrong. The light\_brighter/light\_dimmer become the command for mount tilt up/down for the camera and have several stop, while the sevo\_\_1\_inc/servo\_1\_dec become the command for lumen brighter/dimmer and are continuously controlled. I did not modify the wiring at all, so I wondered if it is software problem. I appreciate any assistance. ![螢幕擷取畫面 2024-11-20 172123](https://us1.discourse-cdn.com/flex019/uploads/bluerobotics/original/2X/e/e3f26638a883d67966b4bb88f2e2ce0ce127942f.png) ---
**Author:** ![tony-white](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.bluerobotics.com/tony-white/32/18385_2.png) [@tony-white](https://discuss.bluerobotics.com/u/tony-white)\ **Post date:** [November 20, 2024, 6:39pm UTC](https://discuss.bluerobotics.com/t/cannot-switch-light-channels-in-vehicle-setup/18520/4 "2024-11-20T18:39:02Z")
Hi @EricLiu - This can happen when switching versions. The easy fix is to load the default parameters from the [vehicle setup page](https://blueos.cloud/docs/latest/usage/advanced/#vehicle-setup) in BlueOS! If you backup your [Autopilot Parameters](https://blueos.cloud/docs/latest/usage/advanced/#autopilot-parameters) first, you’ll be able to restore only the compass and thruster direction related ones to not have to recalibrate your system. ---
**Author:** ![EricLiu](https://avatars.discourse-cdn.com/v4/letter/e/7c8e57/32.png) [@EricLiu](https://discuss.bluerobotics.com/u/EricLiu)\ **Post date:** [November 21, 2024, 9:07am UTC](https://discuss.bluerobotics.com/t/cannot-switch-light-channels-in-vehicle-setup/18520/5 "2024-11-21T09:07:03Z")
Hi Tony, The problem was solved following your instruction, thank you so much!!