The low beam suddenly went out. The high beams work fine?

ANONYMOUS

MEMBER
2004 TOYOTA HIGHLANDER
130,000 MILES

The low beam suddenly went out. The high beams work fine. I checked the bulbs and fuses. They are ok. Could the problem be the relay? I have not checked the switch. I do not know how to get into it.

Tuesday, January 1st, 2013 AT 2:29 AM

5 Replies

SATURNTECH9

MECHANIC
30,869 POSTS

If both low beam bulbs and fuses have been checked and found to be in working order, the next possible culprit could indeed be the relay.

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Tuesday, January 1st, 2013 AT 2:35 AM

JAVIERMARTINEZ

MEMBER
1 POST

Hello, never got the end result of this issue. I'm having the same issues on the same vehical. I do have a multi meter and I have tested passenger receiving 12v. Driver side nothing. High beam, yellow light and fog light all work. Driver side is dead. Fuses are all good. I even purchased a new relay headlight switch and had no change. Please help

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Tuesday, January 15th, 2013 AT 7:34 PM

SATURNTECH9

MECHANIC
30,869 POSTS

So just the low beam driver side is inop?

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Wednesday, January 16th, 2013 AT 1:42 AM

CRAZYFROGZ

MEMBER
4 POSTS

I have the same issue, but mine it the passenger side, up on replacing the bulb after receiving the car, I noticed someone packed a bunch of grease in it, So not I am assuming that the connector can possible be bad, itself, so if u could send me some of the diagrams or videos to help change the connector. I would appreciate it.

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Tuesday, May 30th, 2023 AT 11:02 AM

KEN L

MASTER CERTIFIED MECHANIC
47,536 POSTS

It could be a bad fuse, relay or the bad body ECU. here is a guide to help you test for power so you can see where it loses it at, and the headlight wiring diagrams in the images below.

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

Check out the images (below). Let us know what happens and please upload pictures or videos of the problem so we can see what's going on.

Images (Click to make bigger)