One filament in the headlamp bulb. - Toyota Yaris Forums

ellenbetty · 09-05-2009, 01:04 AM

Am I missing some detail about the Yaris headlamp bulb? On-line I was looking at different Yaris headlamp bulbs. The headlamp bulb is listed as 65/55W. But all I could see in the clear headlamp bulbs is just one filiment.

It looks like the Yaris uses resistors and/or relays to create high beam, low beam and daytime running lights. If I am right, when the DRL burns out the filiament in the headlight bulb, you need to replace the headlamp bulb before dark (or have fog lamps as a backup plan) to avoid driving a one eyed monster.

RedRide · 09-05-2009, 04:44 AM

The yaris uses a 9003/H4 bulb with two filiments.

The DRL uses the low beam (at lower voltage) so, yeah if you loose a DR, replace the bulb ASAP.

goku87 · 09-05-2009, 06:52 AM

one of my headlights looks sad. is this why? one of the filaments died?

IllusionX · 09-05-2009, 12:13 PM

yeppers, you will not see the 2nd filament by looking through the headlight assembly.

Also, if one of your headlight look very DIM compared to the other, you could have a bad ground somewhere... check all your wiring.

Yaris Hilton · 09-05-2009, 12:29 PM

When a headlight does need replacing, it's best done in matching pairs. Replace one, and the two will probably not appear the same color and brightness.

RedRide · 09-05-2009, 07:19 PM

Also, once one goes, the other is living on borrowed time.

ellenbetty · 09-06-2009, 11:18 AM

Found this at Candle Power Inc. Diagram shows 2 filaments. Front filament for high beam. Rear filament for low beam. Not the best diagram.

RedRide · 09-06-2009, 02:30 PM

Interesting read. The PDF explains the "difference" between a 9003 and H4 and clears that up.

09-05-2009, 01:04 AM	#1
ellenbetty ellenbetty View User's Garage Drives: 2 2007 Yaris 3 door liftback Join Date: Nov 2008 Location: Stow Ohio Posts: 182	One filament in the headlamp bulb. Am I missing some detail about the Yaris headlamp bulb? On-line I was looking at different Yaris headlamp bulbs. The headlamp bulb is listed as 65/55W. But all I could see in the clear headlamp bulbs is just one filiment. It looks like the Yaris uses resistors and/or relays to create high beam, low beam and daytime running lights. If I am right, when the DRL burns out the filiament in the headlight bulb, you need to replace the headlamp bulb before dark (or have fog lamps as a backup plan) to avoid driving a one eyed monster.

09-05-2009, 04:44 AM	#2
RedRide Drives: '09 Yaris carmine red 2d HB Join Date: Jun 2009 Location: Middletown, NY Posts: 1,502	The yaris uses a 9003/H4 bulb with two filiments. The DRL uses the low beam (at lower voltage) so, yeah if you loose a DR, replace the bulb ASAP. Last edited by RedRide; 09-05-2009 at 05:39 AM.

09-05-2009, 06:52 AM	#3
goku87 Drives: Black HB Join Date: Oct 2008 Location: AK Posts: 542	one of my headlights looks sad. is this why? one of the filaments died? __________________ Selling: [NST Short Shift Kits] [Clazzio Seat Covers] [Carbon Fiber Shift Knob] [180mm Double Din Dash] [Replacement Stock Headlight Bulb] [Various Interior Trim Pieces]

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09-05-2009, 12:13 PM	#4
IllusionX It's the illusion you see View User's Garage Drives: 07 Yaris Sedan Aero Join Date: Oct 2006 Location: Brossard, QC Posts: 3,888	yeppers, you will not see the 2nd filament by looking through the headlight assembly. Also, if one of your headlight look very DIM compared to the other, you could have a bad ground somewhere... check all your wiring.

09-05-2009, 12:29 PM	#5
Yaris Hilton Half a Bubble Off Plumb Drives: 2009 Yaris Sedan Join Date: Mar 2009 Location: Bristol, Tennessee, USA Posts: 1,593	When a headlight does need replacing, it's best done in matching pairs. Replace one, and the two will probably not appear the same color and brightness.

09-05-2009, 07:19 PM	#6
RedRide Drives: '09 Yaris carmine red 2d HB Join Date: Jun 2009 Location: Middletown, NY Posts: 1,502	Also, once one goes, the other is living on borrowed time.

09-06-2009, 02:30 PM	#8
RedRide Drives: '09 Yaris carmine red 2d HB Join Date: Jun 2009 Location: Middletown, NY Posts: 1,502	Interesting read. The PDF explains the "difference" between a 9003 and H4 and clears that up.