2004 malibu low beam headllights dont work but high beam do

Bright lights wont shut off ? Assume you mean high beams ? Reading how they work might thing high beam relay has stuck contacts inside .

Headlamps
The headlamps may be turned ON 2 different ways. First, when the driver places the headlamp switch in the HEADLAMP position, for normal operation. Second, with the headlamp switch placed in the AUTO position, for automatic lamp control (ALC). During ALC, the headlamps will be OFF in daylight conditions, or low beam operation in low light conditions. Battery positive voltage is supplied to the low beam relay and the high beam relay in the underhood fuse block. When low beam headlamps are requested, the body control module (BCM) supplies ground to the coil side of the low beam relay. This activates the relay and the relay supplies voltage to the left hand low beam headlamp through the LH LOW BEAM fuse and to the right hand low beam headlamp through the RH LOW BEAM fuse. Ground for the left hand low beam headlamp is provided at G101. Ground for the right hand low beam headlamp is provided at G102. When high beam headlamps are requested, the body control module (BCM) supplies ground to the coil side of the high beam relay. This activates the relay and the relay supplies voltage to the left hand high beam headlamp through the LH HIGH BEAM fuse and to the right hand high beam headlamp through the RH HIGH BEAM fuse. Ground for the left hand high beam headlamp is provided at G101. Ground for the right hand high beam headlamp is provided at G102.

must have a loose connection or broken wire.making intermitten contact. Hope this helps good luck

Other possibilities are; the bulbs themselves, burnt or corroded bulb sockets, or a bad headlight selector switch.

This is not hard to fix. Wait until it is dark enough outside to clearly see your headlight beams, then park your car on level ground 20 feet from a wall, fence, garage door, etc. Turn on your headlights (be sure your high beams are off) and open the hood. on the top of each headlight assembly you will find an adjustment screw... just turn the screw with a Phillips screwdriver until the hot spot in the center of your headlight beam hits the wall where it meets the ground.

if you know for sure that the headllights do work(not burnt out),i`ve this happen before,then it could be the headlight switch not working on the headlight side of the switch,or the dimmer switch is not working not allowing power to the headlights on either low or high beams.

if you have power to both headlight plugs for each low and high beam filaments and the ground is good as you say the high beams function normally then you either have bad low beam bulb filaments,poor or dirty connection or you have a daytime running headlight relay on the car and that is the problem with the low beam lights.yes the high beams will work but not low beams if it is the relay.

make sure its the correc bulb--chec over the connection and look inside lite-maybe new but broken

if low beams and high beams dont work check the fuse.if only the low beam lights dont work.and bulbs good.i am looking at dimmer switch.

The adjustment screws/nuts should be located either on the top of the headlamp assembly, behind the headlamp assembly, or near the frame rail by the radiator support.

You will have vertical adjustment screws for each independent beam (separate highs and separate lows, but will be same screw if highs and lows are the same bulb). You may also have additional horizontal adjustment screws as well

Park your car on a level ground 30 feet from a wall and measure the height from the ground to the bulb and mark on a wall (do this for highs beams and low beams if the bulbs are separate, if highs and lows are the same bulb, only do it for the lows)

For Low Beams: If the headlights read VOR, then aim the brightest part or cutoff part just below the mark on the wall. If it says VOL or nothing, aim them 2 inches below the mark on the wall.

For High Beams (if separate from low beams): Aim the headlight directly at the line you marked on the wall.

Autobuygide.com list the recall for this problem.