Headlights do not work

Headlamps Inoperative - Low Beams

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?
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Go to Step 2
Go to Headlight System Check

2

1. Turn the headlamp and panel dimmer switch to the ON position.
2. Move the headlamp dimmer switch to the LOW position.
3. Backprobe the headlamp dimmer switch connector with a J 35616-200 from cavity A to ground.

Does the test lamp light?
--
Go to Step 3
Go to Step 5

3

1. Remove the daytime running lamp relay.
2. Connect a J 35616-200 at cavity G5 to ground.

Does the test lamp light?
--
Go to Step 4
Go to Step 6

4

1. Re-install the daytime running lamp relay.
2. Backprobe cavity B at the high/low beam headlamp with the headlamp dimmer switch in the LOW position.

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

1. Inspect for an open in CKT 12 (TAN) between the daytime running lamp relay and S120, repair as necessary.
2. Replace the daytime running lamp relay if no open was found in CKT 12 (TAN) between the daytime running lamp relay and S120.

Is the repair complete?
--
Go to Headlight System Check
--

Do you have power in and out of the dimmer switch on the low beam circuit ?

Are you sure there not running in daytime running light, when you think high beams are on

Also, there is sensor on the dash, usally on the speaker grate, that senses night and day. In the daytime your headlights will automatically come on when your car is in drive, and be on the high beam bulb, but dimmer than regular. At night, or in low light conditions, your lights will automatically switch from daytime lights to regular low beams. And yes, even when your switch on the dashis turned off, your lights work automatically.

To turn of the auto setting, just push the override button for your dome light, in and out 3 times, you should hear a chime, and your lights should shut off. This setting resets everytime you shut your vehicle off. Or to turn the auto setting back on, push the over ride button 3 more times.

I was told it is a relay switch under the dash called a daytime running light changeover relay. Its the only large rectangular relay 1 1/2 x 3 inches. My daytime running lights dont come on either when starting the car along with low beam, I'm getting this at a dealer tommorrow I can let you know if that does it.

Robin [email protected]

The blinking light is telling you that you have a headlight out, if you look the service light should be coming on when the light stops blinking.
Replace the head light and all should be fine.

Sounds like you need a bulb,the daytime running lights send power to the high beam wire so they look like low beam lights are on but really they are high beam lights running on low voltage.

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.

Check fuses

did you try removing the DRL fuse to disable the daytime running lights, and double check your bulbs and fuses for the regular headlights? I'm not much of a mechanic but I'll take that fuse box before messing with anything else.

take a look to you DRL unit, it might be the cause, but usually, when the Daytime running light unit (DRL) is faulty, either the bulbs and the clusters lights are not working anymore.... might worth taking a look on that