Headlight not working
jerry1967
08-24-2010, 11:19 AM
I have a 2000 Regal and the drivers side headlight is not working. I changed the light itself but still nothing. The passengers side works.
Anybody have a idea how to see what the problem is?
Anybody have a idea how to see what the problem is?
Airjer_
08-24-2010, 11:36 AM
Did you check the fuse in the underhood fuse block? I do believe they have left and right headlamps fused separately.
jerry1967
08-24-2010, 04:08 PM
Did you check the fuse in the underhood fuse block? I do believe they have left and right headlamps fused separately.
Ok I will try that, I didn't know they have separate fuses.
Thank you.
Ok I will try that, I didn't know they have separate fuses.
Thank you.
jerry1967
08-25-2010, 07:37 AM
I put new fuses in but still no light. Anybody have any suggestions how I can find the problem?
Airjer_
08-25-2010, 08:44 AM
Make sure the connector at the headlamp isn't burnt up. If its o.k. than....
You'll need a test light or a multi meter and a basic understanding of automotive electricity. At the headlamp connector there should be power at the orange/black wire all the time. If there is no power than check for power at the fuse. If there is power at the fuse than the problem is in between the connector and the fuse and you'll need to start ripping that harness apart.
The headlamp is turned on when the switch grounds the dark blue wire. So with your test light/multi meter hooked to power you should see 12 volts with the head lights on on that wire at the headlamp connector. If you don't see th switch grounding than you have an issue between the connector and the underhood junction block. Since the other one works we know that the headlamp switch is working and since the two headlight grounds meet in the junction block we know the wiring from the switch is good to the junction block. You can check continuity between pins A11 and D10 on the junction block side of connector 3. If there is no continuity than the junction block is bad. If there is continuity that the wiring between the junction block and the headlamp connector is bad.
You'll need a test light or a multi meter and a basic understanding of automotive electricity. At the headlamp connector there should be power at the orange/black wire all the time. If there is no power than check for power at the fuse. If there is power at the fuse than the problem is in between the connector and the fuse and you'll need to start ripping that harness apart.
The headlamp is turned on when the switch grounds the dark blue wire. So with your test light/multi meter hooked to power you should see 12 volts with the head lights on on that wire at the headlamp connector. If you don't see th switch grounding than you have an issue between the connector and the underhood junction block. Since the other one works we know that the headlamp switch is working and since the two headlight grounds meet in the junction block we know the wiring from the switch is good to the junction block. You can check continuity between pins A11 and D10 on the junction block side of connector 3. If there is no continuity than the junction block is bad. If there is continuity that the wiring between the junction block and the headlamp connector is bad.
jerry1967
08-26-2010, 05:07 PM
Make sure the connector at the headlamp isn't burnt up. If its o.k. than....
You'll need a test light or a multi meter and a basic understanding of automotive electricity. At the headlamp connector there should be power at the orange/black wire all the time. If there is no power than check for power at the fuse. If there is power at the fuse than the problem is in between the connector and the fuse and you'll need to start ripping that harness apart.
The headlamp is turned on when the switch grounds the dark blue wire. So with your test light/multi meter hooked to power you should see 12 volts with the head lights on on that wire at the headlamp connector. If you don't see th switch grounding than you have an issue between the connector and the underhood junction block. Since the other one works we know that the headlamp switch is working and since the two headlight grounds meet in the junction block we know the wiring from the switch is good to the junction block. You can check continuity between pins A11 and D10 on the junction block side of connector 3. If there is no continuity than the junction block is bad. If there is continuity that the wiring between the junction block and the headlamp connector is bad.
(I am getting power at the orange/black wire. So I quess it must be the ground wire. Does anybody have a picture of the connector and the underhood junction block? What are pins A11 and D10 on the junction block?)
You'll need a test light or a multi meter and a basic understanding of automotive electricity. At the headlamp connector there should be power at the orange/black wire all the time. If there is no power than check for power at the fuse. If there is power at the fuse than the problem is in between the connector and the fuse and you'll need to start ripping that harness apart.
The headlamp is turned on when the switch grounds the dark blue wire. So with your test light/multi meter hooked to power you should see 12 volts with the head lights on on that wire at the headlamp connector. If you don't see th switch grounding than you have an issue between the connector and the underhood junction block. Since the other one works we know that the headlamp switch is working and since the two headlight grounds meet in the junction block we know the wiring from the switch is good to the junction block. You can check continuity between pins A11 and D10 on the junction block side of connector 3. If there is no continuity than the junction block is bad. If there is continuity that the wiring between the junction block and the headlamp connector is bad.
(I am getting power at the orange/black wire. So I quess it must be the ground wire. Does anybody have a picture of the connector and the underhood junction block? What are pins A11 and D10 on the junction block?)
Automotive Network, Inc., Copyright ©2026