# Hazard lights won't work unless the turn signal (left or right) is switched on at the same time **URL:** \ **Category:** Maintenance/Repairs\ **Created:** [February 28, 2016, 7:39am UTC](https://community.cartalk.com/t/hazard-lights-wont-work-unless-the-turn-signal-left-or-right-is-switched-on-at-the-same-time/92649 "2016-02-28T07:39:54Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![kidd](https://avatars.discourse-cdn.com/v4/letter/k/74df32/32.png) [@kidd](https://community.cartalk.com/u/kidd)\ **Post date:** [February 28, 2016, 7:39am UTC](https://community.cartalk.com/t/hazard-lights-wont-work-unless-the-turn-signal-left-or-right-is-switched-on-at-the-same-time/92649/1 "2016-02-28T07:39:54Z")
I have a chevrolet optra 2007 and the hazard lights won’t work unless the turn signal (left or right) is switched on at the same time. Turn signals work perfectly fine. ---
**Author:** ![missileman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/missileman/32/1366_2.png) [@missileman](https://community.cartalk.com/u/missileman)\ **Post date:** [February 28, 2016, 5:03pm UTC](https://community.cartalk.com/t/hazard-lights-wont-work-unless-the-turn-signal-left-or-right-is-switched-on-at-the-same-time/92649/2 "2016-02-28T17:03:51Z")
When things start to go wonky with the vehicle lights on GM products…it usually means that the multifunction switch is failing. ---
**Author:** ![kidd](https://avatars.discourse-cdn.com/v4/letter/k/74df32/32.png) [@kidd](https://community.cartalk.com/u/kidd)\ **Post date:** [February 28, 2016, 10:19pm UTC](https://community.cartalk.com/t/hazard-lights-wont-work-unless-the-turn-signal-left-or-right-is-switched-on-at-the-same-time/92649/3 "2016-02-28T22:19:53Z")
thank you for your response missileman. Is it possible that the relay switch is defective? ---
**Author:** ![John\_Andrew\_McCormick](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/john_andrew_mccormick/32/7141_2.png) [@John\_Andrew\_McCormick](https://community.cartalk.com/u/John_Andrew_McCormick)\ **Post date:** [February 28, 2016, 11:09pm UTC](https://community.cartalk.com/t/hazard-lights-wont-work-unless-the-turn-signal-left-or-right-is-switched-on-at-the-same-time/92649/4 "2016-02-28T23:09:08Z")
You could check the fuses It’s possible one is going bad… But @missileman post sounds about right. ---
**Author:** ![Cougar](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/cougar/32/21348_2.png) [@Cougar](https://community.cartalk.com/u/Cougar)\ **Post date:** [February 29, 2016, 12:48am UTC](https://community.cartalk.com/t/hazard-lights-wont-work-unless-the-turn-signal-left-or-right-is-switched-on-at-the-same-time/92649/5 "2016-02-29T00:48:18Z")
Make sure the connector going to the flasher switch is making good connection. It sounds like the connection between the switch and flasher module that turns on the module has a problem. So when the turn signals are used then the module activates and the flashers work. The switch connection could be making a power or possibly a ground connection to turn the module on. ---
**Author:** ![VDCdriver](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/vdcdriver/32/30_2.png) [@VDCdriver](https://community.cartalk.com/u/VDCdriver)\ **Post date:** [February 29, 2016, 3:31am UTC](https://community.cartalk.com/t/hazard-lights-wont-work-unless-the-turn-signal-left-or-right-is-switched-on-at-the-same-time/92649/6 "2016-02-29T03:31:29Z")
**“You could check the fuses It’s possible one is going bad.”** Huh? A fuse is either “good” or it has blown. There is no in-between. ---
**Author:** ![John\_Andrew\_McCormick](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/john_andrew_mccormick/32/7141_2.png) [@John\_Andrew\_McCormick](https://community.cartalk.com/u/John_Andrew_McCormick)\ **Post date:** [February 29, 2016, 4:11am UTC](https://community.cartalk.com/t/hazard-lights-wont-work-unless-the-turn-signal-left-or-right-is-switched-on-at-the-same-time/92649/7 "2016-02-29T04:11:39Z")
@VDCdriver I would have said I agree but I pulled a fuse in my car that was for the window switches and it was still good… Or appeared that way, either way I switched it and the window switch is working now… At first I thought that the plug had disconnected but that wasn’t the case… Strange things can happen. Or maybe there’s just a short somewhere ? ---
**Author:** ![Cougar](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/cougar/32/21348_2.png) [@Cougar](https://community.cartalk.com/u/Cougar)\ **Post date:** [March 1, 2016, 12:02am UTC](https://community.cartalk.com/t/hazard-lights-wont-work-unless-the-turn-signal-left-or-right-is-switched-on-at-the-same-time/92649/8 "2016-03-01T00:02:40Z")
It isn’t a short, as I stated earlier, it is a bad connection causing the trouble.