boulder_dweeb Reader
12/23/20 9:48 a.m.

The car has replacement headlamp assemblies. High beams are BRIGHT. Low beams are barely useful.

I kinda remember a hack to put brighter bulbs in the low beam sockets.  Several forums talk about HID bulbs.

Has anyone else had this problem? How did you fix it?



mr2s2000elise UltraDork
12/23/20 10:01 a.m.

My wife's 03 RX (older than your Corolla) has very similar issue. Instead of doing the hack where you can run a higher wattage bulb, I installed a DDM hid kit for the low beams. Problems solved for us . 

californiamilleghia SuperDork
12/23/20 10:30 a.m.

simple thought , did you check the grounds ?

or run a thicker ground wire ?

Dusterbd13-michael (Forum Supporter)
Dusterbd13-michael (Forum Supporter) MegaDork
12/23/20 10:48 a.m.

Also, a lot of times aftermarket headlights come with stupendously cheap and E36 M3ty bulbs. Step one should be highwr wattage hella bulbs. And a good headlight alignment. 

adam525i (Forum Supporter)
adam525i (Forum Supporter) HalfDork
12/23/20 11:30 a.m.

I posted this in the other recent headlight thread, it looks like your Corolla uses 9006 bulbs for the low beams. You can replace them with a 9012 bulb with a modification to one of the tabs on the bulbs to make it fit. These are the same wattage as original so no worries with wiring or heat but a much more efficient design, that means a lot more light output. I did this with my high beams on my car and the difference was worthwhile and easy to do.

Pete. (l33t FS)
Pete. (l33t FS) MegaDork
12/23/20 11:48 a.m.

Try OEM headlights.  Aftermarket headlights usually have atrociously bad patterns.  Adding brightness won't make it better.

andy_b New Reader
12/23/20 12:41 p.m.

I have the same issue with my 03 Corolla (same generation). I'm definitely going to try the 9012 bulb retrofit. 

iceracer MegaDork
12/23/20 1:51 p.m.

First, check the grounds.

boulder_dweeb Reader
1/22/21 11:39 a.m.

Thanks to Adam525i!

Did the 9012 hack on both low beams. Works great!

Thanks again.


WonkoTheSane (FS)
WonkoTheSane (FS) SuperDork
1/23/21 2:33 p.m.

In reply to boulder_dweeb :

Thanks for following up for those playing along at home :)

Our Preferred Partners