# 2018 Toyota RAV4 - One bad headlight

**URL:** <https://community.cartalk.com/t/2018-toyota-rav4-one-bad-headlight/186464>\
**Category:** Maintenance/Repairs\
**Tags:** toyota, headlights\
**Created:** [September 20, 2022, 9:19pm UTC](https://community.cartalk.com/t/2018-toyota-rav4-one-bad-headlight/186464 "2022-09-20T21:19:30Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![dutchfox](https://avatars.discourse-cdn.com/v4/letter/d/65b543/32.png) [@dutchfox](https://community.cartalk.com/u/dutchfox)\
**Post date:** [September 20, 2022, 9:19pm UTC](https://community.cartalk.com/t/2018-toyota-rav4-one-bad-headlight/186464/1 "2022-09-20T21:19:30Z")

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Left headlight doesn’t light even when using good bulbs. Bulbs work in right side.

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**Author:** ![weekend-warrior](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/weekend-warrior/32/26122_2.png) [@weekend-warrior](https://community.cartalk.com/u/weekend-warrior)\
**Post date:** [September 20, 2022, 9:25pm UTC](https://community.cartalk.com/t/2018-toyota-rav4-one-bad-headlight/186464/2 "2022-09-20T21:25:43Z")

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you need to check the connector for corrosion or burn marks. check the wiring for burnt area or breaks. and check to see if you have a separate fuse or relay for that side that could be bad…

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**Author:** ![George\_San\_Jose1](https://avatars.discourse-cdn.com/v4/letter/g/e5b9ba/32.png) [@George\_San\_Jose1](https://community.cartalk.com/u/George_San_Jose1)\
**Post date:** [September 22, 2022, 11:04pm UTC](https://community.cartalk.com/t/2018-toyota-rav4-one-bad-headlight/186464/3 "2022-09-22T23:04:33Z")

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If continuing to have this problem, ask shop to measure voltage at the non-functioning headlight connector. It won’t ever light up if the correct voltage at the connector isn’t present. Caution: Some headlight systems in newer vehicle use a high voltage. If so, let shop do the test, not diy’er friendly.

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**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\
**Post date:** [September 22, 2022, 11:14pm UTC](https://community.cartalk.com/t/2018-toyota-rav4-one-bad-headlight/186464/4 "2022-09-22T23:14:56Z")

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The ballast for the LED may have failed.

> **[2016 2017 2018 TOYOTA RAV4 LED WITH BALLAST FRONT RIGHT OEM HEADLIGHT | eBay](https://www.ebay.com/itm/325274608927)**
>
> OEM GENUINE. RIGHT PASSENGER SIDE. YOU WILL RECEIVE ITEM YOU SEE ON PICTURES.

Tester