2002 Acura TL low beam headlight

Question edited to add maker.
Question moved to model category.

Here is one idea and some videos.

https://www.justanswer.com/acura/6uky3-acura-mdx-low-beam-headlights-will-not-on.html

Dennis, Make sure the low beam bulbs are OK, first. if fuses and grounds OK, it will be your multi switch, which you nay be able to disassemble and clean contacts.
Low Beams Not Working Resolved

How to Fix Low Beam Headlight

Low beams out high beams work

Acura TL Headlight Replacement WITHOUT removing the bumper

most newer vehicles have individual fuses and or relays that controls each headlight separately, check the fuse panel under the hood, inside the lid there is usually a listing of what the fuses and relays do. look for drivers side low beam and take a look at the fuse, if it blown, try to replace the fuse, but there is usually a reason why it blew in the first place.
How did you test to see if the bulb was still good? ive seen dead bulbs that still look ok, try and plug the bulb from the non working side into the working side and double check.

The headlights run thru the multifunction switch, turnsignal switch. this is your most likely culprit.

The same thing happended to my Acura RSX and now they are saying that it is an electrical problem. I put new bulbs and both of them are fused

Test the leads to the bulbs while the low beams are on and then when the brights are on. If you have good bulbs & fuses with no power on low, the problem is most likely the bright/dim switch.
Not exactly sure of the Acura layout, but the covers over the steering shaft should remove with several screws to allow access to the switch (usually the turn signals are also the bright/dim switch) Test the leads out to the headlights from the bright/dim switch, that will tell you if the switch is bad.
Airbags are closely involved with this removal/replacement, it is NOT recommended for a amatuer to undertake.

in this case make sure you have voltage going to the low beam lights. 12 volts. you need a volt meter. if you do not have volatge you have to check and make sure power is going through the fuse. a bad fuse will be broke, but you can have a good fuse with no power going through it. if you have power going through the fuse you have a wiring open somewhere between fuse and whatever is between the headlight connecter.

plz check and get back i will keep checking on here on and off.

Michael
ASE certified
PLZ rate

If your car is running daytime running light system .. there is a DTR relay that goes defective and needs replacing ... I had the identical problem that was fixed with this replacement. The DTR relay is behind the glovebox.

Please watch the video Acura TL Headlight Replacement WITHOUT removing the bumper

MAKE SHURE YOUR GROUNDED AND THE BULB IS IN RIGHT SOME BULBS YOU CAN NOT TOUCH WITH YOUR FINGERS BECAUSE OF MISTURE ON SKIN