Toyota Yaris Forums - Ultimate Yaris Enthusiast Site


Go Back   Toyota Yaris Forums - Ultimate Yaris Enthusiast Site > Technical Forums > DIY / Maintenance / Service
  The Tire Rack

Thread Tools Display Modes
Old 09-20-2018, 05:21 PM   #1
Drives: 08 Yaris HB
Join Date: Aug 2018
Location: 405
Posts: 2
Headlight woes.

Hey there, having some headlight issues.

Tuesday my passenger side headlight went out, so of course I grab a new bulb and toss it in, and it doesn't light up all the way. Dim, and not coming all the way on. So, I figure maybe I got a bum bulb and get another, same issue. Started googling around, checked my underhood 10A fuses, all were fine. Wiggled the connector around, no change. Used a multi on the connector, and was getting about 5 volts and then it started dropping down on the green wire, the black and blue wires were like .004 volts I think. Checked it with car off, and car in accessory.

Thought maybe I had a bad ground, only one I can find that looks like it may go to it is a small wire (same size as the HL connector wires) that is white, and connects to the frame for the radiator on the drivers side. It looked fine, and the drivers side bulb has no issues so I didn't mess with it.

Any help would be appreciated. It worked fine before, now kaput.

Car Info:

2008 Toyota Yaris Hatch
All stock.

Last edited by EGGBEATER; 09-20-2018 at 05:22 PM. Reason: Car info.
EGGBEATER is offline   Reply With Quote
Old 09-20-2018, 05:33 PM   #2
ern-diz's Avatar
Drives: 2007 Liftback
Join Date: Sep 2007
Location: CA all day
Posts: 3,432
Sorry you're having trouble. I'm by no means an expert, but I do remember having a similar issue to yours years ago. It started happening after having a front end collision early in my car's life. The body shop that did the repairs used regular size fuses rather than the extra tiny fuses the car comes with from the factory. My headlights still worked, but because the fuses were larger than they were supposed to be, they would occasionally touch each other from vibration (the fuses install opposite of each other in the fuse box) and when they did, one of my headlights would dim. Swapping out the standard size fuses for the smaller ones solved the issue and it's never given me another problem.

I know you said you checked all fuses and they were good, but did you pull them out to confirm that they are the super small kind and haven't been replaced at some point with the larger, standard size fuses?
ern-diz is offline   Reply With Quote
Old 09-20-2018, 08:46 PM   #3
Drives: 08 Yaris HB
Join Date: Aug 2018
Location: 405
Posts: 2
Yep they are the tiny bus fuses. Car has never been in a wreck.
EGGBEATER is offline   Reply With Quote
Old 09-20-2018, 10:17 PM   #4
Drives: 07 5dr
Join Date: Nov 2015
Location: YYC
Posts: 174
The Yaris has the headlights on a ground side switched set, what that means is the black wire at the passenger side headlight should have +12V at all times. Test the black wire with one lead on the black wire and the other lead on the a good ground or the negative battery terminal. If you don't have at least 12V then swap the two headlight fuses around (the fuses can be partially blown which is hard to spot just by looking). If you're still getting less then 12V then you know it's a wiring problem between the fuse box and the headlight, if the dimness issue moved to the other headlight you know it's the fuses. The blue wire is the low beam ground, green wire is the high beam ground. If you have a solid 12V at the black wire and the pass. side headlight is still dim you know it's a ground issue.
B.B._07 is offline   Reply With Quote

Thread Tools
Display Modes

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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
diy HID projector w/ halo headlight install tmontague DIY / Maintenance / Service 17 02-04-2016 12:34 PM
Replacing headlight bulbs in under 5 minutes without removing the bumper 07liftback DIY / Maintenance / Service 0 01-23-2015 12:11 PM
DIY Projector/HID (sedan) Brian DIY / Maintenance / Service 145 02-05-2012 05:13 AM
How To Smoked Sedan Headlight -DIY zulhizainL902S DIY / Maintenance / Service 26 01-14-2011 03:12 AM
Glassylite Headlight Restoration Kit TEHxFALLEN V1.2 Photo-Video-Media Gallery 1 07-03-2010 12:51 AM

All times are GMT -4. The time now is 11:53 PM.

Powered by vBulletin® Version 3.8.0
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.