I have replaced fuses bulbs are good as daytime running lights work i have replaced switch on dash that also controls trunk lid release and traction control
The headlamps are controlled by the BCM - body control module , do you know what that is ? The headlamp switch is a input to the BCM ,the BCM energizes relays to turn on the headlmps , low beam relay , high beam relay , DRL relay . These relay's are PCB - printed circuit board relay's ( non - serviceable ) If found to be bad the whole under hood fuse box would need to be replaced .
Low Beam Headlamp Operation
The low beam headlamps may be turned ON in 3 different ways:
• When the headlamp switch in the HEAD position for normal operations
• When the headlamp switch is in the AUTO position, for automatic lamp control (ALC)
• When the headlamp switch is placed in the AUTO position, with the windshield wipers ON in daylight conditions, after a 6 second delay
Battery voltage is applied at all times to the coil and switch sides of the LOW BEAM PCB Relay located in the underhood fuse block. When the headlamp switch is placed in the HEAD position, ground from G202 is applied through headlamps ON switch signal circuit to the body control module (BCM), signaling the headlamps ON request. In response to this signal, the BCM applies ground through the headlamp low beam relay control circuit energizing the low beam relay. With the relay energized, battery voltage is applied through the switch side of the relay, the left and right low beam fuses, and the low beam supply voltage circuits illuminating the low beam headlamps. Ground for the left headlamp is provided at G101 and the right headlamp at G100.
Do you know what B codes are ? BCM - DTC'S - diagnostic trouble codes , need a factory scanner or professional one to view these codes , not autozone or advance etc....Having a qualified repair shop check your vehicle would be your best bet.
DTC B2575 00: Headlamp Control Circuit
Circuit/System Description
The vehicle headlamps are controlled by the body control module (BCM) based on inputs from the headlamp switch and the turn signal/multifunction switch. The headlamp switch has four positions: Off, Auto, Park, and Headlamps. The default headlamp switch position is Auto, in which the BCM uses the ambient light sensor to determine when headlamps are needed. The Off portion of the headlamp switch is a momentary switch which overrides the automatic headlamps and will turn off the vehicle headlamps. When in the Off position, the headlamp switch grounds the headlamp switch headlamps off signal circuit, prompting the BCM to turn off the headlamps. The Park position of the headlamp switch will only illuminate the vehicle parking lamps. The Headlamp position of the headlamp switch will illuminate both the parking lamps, as well has the headlamps. With the headlamp switch in the Headlamp position, the headlamp switch headlamps on signal circuit is grounded, prompting the BCM to turn on the headlamps, regardless of other factors such as ambient light.
The headlamp high beams are controlled through the flash to pass switch and the headlamp dimmer switch, both located in the turn signal/multifunction switch. The flash to pass switch is a momentary type switch, designed to illuminate the high beams as long as the switch is held. With the switch closed, the flash to pass switch signal circuit is grounded, prompting the BCM to turn on the high beam lamps. The headlamp dimmer switch allows the operator to select between full time high or low beam operation. Unlike the flash to pass switch, it is not a momentary switch. When the headlamp dimmer switch is in the high beam position, the headlamp dimmer switch high beam signal circuit is grounded. This prompts the BCM to turn on the high beam lamps.
The BCM controls the headlamps based on the inputs explained above. When a low beam request is received, the BCM grounds the headlamp low beam relay control circuit. This energizes the coil in the LOW BEAM PCB relay, causing the relay switch to close. This then applies B+ to both low beam headlamps through the LT LO BEAM and RT LO BEAM fuses, illuminating the low beam headlamps. When a high beam request is received, the BCM grounds the headlamp high beam relay control circuit. This energizes the coil in the HIGH BEAM PCB relay, causing the relay switch to close. This then applies B+ to both high beam headlamps through the LT HI BEAM and RT HI BEAM fuses, illuminating the high beam headlamps
Check here: http://www.impalaforums.com/chevy-impala-8th-gen-discussion/302736-low-beams-not-working.html
This part of service bulletin I found for your vehicle, lo beam. Hope you can read it.
SOURCE: Low beam headlights don't work
I know this is not your problem, but my low beam stopped working, both bulbs failed, no burn marks or broken element. Just had to tell someone
SOURCE: low beam headlight /daytime light are not working
It's on the driver's side. Remove all the plastic & it's in there.Big rectangle, black box,about 1.5" thick,lotta wires.
SOURCE: i replaced the headlight bulb because the high
There should be separate relays for the low and high beams. located in the fuse box, probably under the hood. they look like plug-in small rectangular black boxes.
SOURCE: no low or high beams
Check Relay under hood in box mounted behind front left fender. Should be a cover on 8"x6" box, location should be printed under lid on sticker as to which relay.
SOURCE: Daytime Running Lights Inoperative 2002 Toyota Camry
[Information] For a 2002 Toyota Camry, the Daytime
Running Lights (DRL) operate utilizing the High Beams (inner Lamps closer to
the center of the vehicle front) at a reduced power. [The troubleshooting process:] Review the Owner's Manual and ensure the test
configuration matches the following criteria: 2. Set the Test Conditions according to Step 1 above. 3. Check the headlight bulbs to ensure they are not
burned out. If one burns out, there is a fair chance that the other would have burned
out at the same time. Replace as necessary.
In this case, if the high beams operate, the DRLs should also operate. My problem was that the test configuration did not have
the engine running and parking brake off - Step 1. Problem solved with much
thought, repetitive tests on the vehicle and going back to the basics -- what
does the Owner's Manual say and where are the applicable fuses and relays
located?
1. According to the 2002 Toyota Camry Owner's Manual (Check your Owners Manual):
"The DRL system will make your headlights come on at a reduced brightness
when:
The light switch s in the "DRL" position.
The ignition is on with the engine running.
The headlight switch is off.
The parking brake is released."
4. Test the system, ensuring the step 1 conditions are set. (Engine running, Multi-function
Switch on Turn Signals in "DRL" position, headlight switch off
(repeating what the manual says -- it should be obvious that in the
"DRL" position, the headlight switch should be off / do not have the
switch positioned to "High Beam"), and the Parking Brake
"off").
5. If DRL lights do not work, check the engine compartment Fuse and Relay Box.
there is a 5 Amp DRL fuse -- replace it with the spare. Test (step 4).
6. If it does not work, swap around or replace relays -- there are three (3).
Any one of them could be bad (stuck or burned out). Test (step 4).
7. Other less likely possible issues
could be that the Multi-function Switch is broken or a connection / wire is
broken. [Beyond the scope of this
process.]
Step
Action
Value(s)
Yes
No
DEFINITION: This diagnostic procedure should only be used if the high beam headlamps are operating properly and the low beams are inoperative.
1
Did you perform the Headlights System Check?
--
Go to Step 2
Go to Headlight System Check
2
Does the test lamp light?
--
Go to Step 3
Go to Step 5
3
Does the test lamp light?
--
Go to Step 4
Go to Step 6
4
Does the test lamp light?
--
Go to Step 7
Go to Step 8
5
Replace the headlamp dimmer switch.
Is the repair complete?
--
Go to Headlight System Check
--
6
Repair the open in CKT 359 (PPL) between the headlamp dimmer switch and the daytime running lamp relay.
Is the repair complete?
--
Go to Headlight System Check
--
7
Replace the high/low beam headlamps.
Is the repair complete?
--
Go to Headlight System Check
--
8
Is the repair complete?
--
Go to Headlight System Check
--
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