The number one reason behind 2000 chevy impala headlights not working is burned-out bulbs. Replacing the burned-out bulbs solve this problem.
However, it can also be caused by a blown fuse, malfunctioning relay, wiring issues, and a faulty dimmer switch. There are also corroded headlight sockets, malfunctioning BCM, worn-out headlight assembly, and electrical issues.
Keep on reading to find out about all these problems in detail and learn how you can fix them. Let’s dive in!
Table of Contents
How Do Car Headlights Work
Before we delve deep into the potential issues that can cause your headlights to malfunction, let’s understand how they work first. This knowledge will help you diagnose what went wrong with your headlights much better.
Luckily, headlight technology isn’t complicated at all. Even for modern cars with upgraded models, the underlying mechanism is still quite simple. It’s one of the easiest systems compared to the other ones in your car.
The basic components involved in a headlight system are fuses, relays, bulbs, and a switch. There are different variations of headlights depending on the model of your car. Some of them are adaptive lights, fog lights, and daytime running lights.
No matter which variation your car has, how headlights work stays pretty much the same. Here’s a quick look at it:
- When you turn on the headlights with a switch, it activates the relay.
- The relay connects your car battery with the headlights.
- The headlights are turned on when the relay clicks.
- Fuses are also put in place to protect the rest of the electrical system and wiring when there’s a shortage.
Regardless of what type of headlights you use, that’s essentially how they work. For example, if you want to turn on your high beam, there will be high beam relays installed in your car that’ll get triggered when you press the switch.
When something goes wrong with any of these components, your headlights will fail. You can diagnose what’s causing them to fail by looking at the nature of the problem and using your own common sense. Now, let’s take an in-depth look at why your car’s headlights can fail.
2000 Chevy Impala Headlights Not Working [9+ Easy Fixes]
In this section, we’ll look at the most common issues behind your Chevy impala headlights not working and provide clear step-by-step instructions on how you can solve each of these problems.
Note: You can also read why chevy impala won’t start the security system and how to fix it.
1. Burned Out Bulbs
Nine times out of ten, the reason that your 2000 or 2004 Chevy impala headlights not working is burned-out bulbs. Even if you install both headlights at the same time, it’s not necessary that they’ll have an equal lifespan and one can go out before the other.
So, the most common symptom of having burned-out bulbs is when you notice that one headlight stops working first. It’s rare for both bulbs to go out at the same time but not impossible.
Sometimes, the second bulb will go bad shortly after the first bulb. But it can happen in such a short time span that it’d feel like both of them have gone bad at the same time to you.
Check the “solution” section to know how you can inspect the headlight bulbs and replace them if they’ve gone bad.
Before coming to the conclusion that you have a bad bulb, we recommend taking a look at the electrical connector. Sometimes, a visual inspection of it would reveal signs of damage and corrosion.
Push the connector back in if it has come loose and that should fix the problem. Clean or replace the connector if it’s corroded.
Even if doing that fixes the issue, we recommend you dig deeper into this problem and find out why it had come loose or become corroded. Then, solve the reason behind it for a permanent fix.
If the connector is fine, your next course of action is to inspect the bulbs. You’ll need a voltmeter to check whether there’s power in the headlights and whether the bulbs have gone bad or not. Follow these steps:
- Turn on the headlight switch.
- Connect the positive lead to a headlight connector terminal and the negative lead to a source of good ground.
- Repeat the process for the other headlight terminal if both of them are not working.
If burned lights are causing the issue, one of the terminals will show battery voltage, and the other one won’t show anything. You’ll have to replace the bulbs if they have gone bad.
How To Replace Headlight Bulbs
Taking the help of some basic tools, you can replace the headlights on your own. Collect a screwdriver, ratchet, new headlight bulbs, and a pair of safety glasses and gloves to do the replacement job successfully.
Even if one bulb has gone bad, it’s recommended that you change both of them so that you can look at the road with even lighting and have better vision. Here’s how you can replace them:
Step 01 – Ensure Your Safety
- Make sure you’re wearing safety gloves and goggles to protect yourself as you’ll be dealing with sensitive bulbs and reach into tight spots.
- You’ll have to only replace either the low-beam lights if they’re out or the high-beam ones if they’ve gone bad.
Step 02 – Take Out The Headlight
- Pop the first clip and wiggle it out.
- Pull the two white clips about an inch and they’ll come right off.
- Now, you’ll be able to pull the headlight assembly out.
Step 03 – Replace The Bulbs
- Take off the old bulbs by rotating them counterclockwise and pulling them from their connectors.
- Put the new bulbs in place of the old ones and make sure the glass doesn’t get dirty as that can cause the bulbs to go out early.
- Follow the instruction manuals to make sure that you’re putting them in the correct position.
- Repeat the same process for the other headlight.
- Put the clips back together.
That’s it, you’re done. You’ve replaced bulbs and now it’s time to check if that solves the problem. Turn on your headlight switch and if they come on, you’ve done a perfect job in diagnosing and fixing the issue. Now, you can go back to driving your car.
Remember that the failure of bulbs is normal after 500 to 1,000 hours as they’re supposed to last this long on regular use.
But if they’ve gone bad way before this period, it means there are more things that you’ll have to inspect and look out for.
2. Blown Fuse
The next thing to check if your 2000 Chevy impala headlights aren’t working properly is the fuse. If you have both the headlights in your car fail at the same time, it’s likely that there’s a blown fuse in your car.
In Chevy Impala vehicles, there are two fuses for headlights – a 15 amp fuse and a 10 amp fuse. The first one sends power to the high-beam and low-beam lights on the driver’s side.
The 10 amp fuse does the same for the passenger’s side. Both of them are located in your engine bay.
First, locate the fuse box and remove the cover to inspect them. Take off both these fuses and inspect them one by one. If the wire between them is broken or burnt, you’ve found the culprit.
When you’ve identified a blown fuse in your vehicle, the solution is simple. You need to replace them. Make sure you replace the faulty fuse with another one that has the same amperage.
Don’t use a higher amperage fuse as they’re meant to protect your vehicle’s electrical system from severe damage. Replacing the existing fuse with higher amperage fuses will beat their very purpose.
If replacing the fuse solves the headlights not working issue in the long run, then you’re good to go. But if the new fuse also gets blown in a short while, there’s a bigger problem somewhere else in the circuit. You need to keep on diagnosing the root problem if that’s the case.
3. Malfunctioning Relay
If both the bulbs and the fuses are fine, the next most likely culprit to keep your 2000 or 2001 chevy impala headlights not working is a bad relay. Thankfully, faulty relays are easy to diagnose.
Unfortunately, it’s a little difficult to access the headlight relay in Chevy Impala vehicles. It’s located inside the car on the passenger’s side.
But once you get your hands on it, you can tell in no time if it has gone bad. Pull out the relay and start shaking it.
If there’s a rattling noise coming from it, that’s the first indicator that you have a bad relay. Then, put an identical relay in its place and turn on your headlights.
If they work, that’s the second indicator. It’s all the confirmation you need to diagnose that you have a malfunctioning relay.
Just like blown fuses, the solution to a malfunctioning relay is also simple. You have to replace it with a new one.
Relays are inexpensive and easy to replace. You’re lucky if this was the reason why the headlights weren’t working. You can fix this issue in no time and get back on the road soon.
4. Wiring Issues
Whenever something goes wrong with any electrical system, there’s always a chance that there are wiring issues behind it. The same applies to the headlights of your car.
If rodents have somehow got under the hood of your car and chewed on the wires, it can cause a connection to come loose and keep the headlights from working properly.
The first step to know for sure if you have any wiring issues is to check for power at the headlights with the voltmeter. If you don’t get any power, then something is preventing the electricity from coming to the headlights.
Chances are that it has something to do with the wiring. Your next step is to do a visual inspection of the wiring system and see if any of the wires have come loose. Wiring issues can also explain why your fuse keeps on blowing after replacing them.
The faulty wiring will lie between the fuse box and the battery in most cases. But since the wiring system of your car can be quite complicated, don’t beat yourself up if you can’t find where the issue is coming from.
We recommend that you take your car to an expert who can do this diagnosis.
Finding out the source of the wiring issues is the hard part. Once you’ve done that, fixing it is easy peasy. Replace the faulty wiring in your car and tighten the loose connections. That’ll get the headlights to work again.
5. Faulty Dimmer Switch
Another potential reason behind your 2000 chevy headlights not working is a faulty dimmer switch. This is even more so the case if your high beams and parking lights work fine but the low beams don’t work.
You can confirm whether you have a bad dimmer switch or not by inspecting it with a 12V test light. Follow these steps to conduct the test:
- Make sure your headlight switch is on.
- Remove each of the low beam headlight’s electrical connectors.
- Use the test light and check for voltage at each headlight socket (one at a time).
- If you don’t see any voltage, take off the steering column in order to inspect the dimmer switch.
- Remove the electrical connector from the dimmer switch and check it with the test lights.
If you’re having trouble locating the dimmer switch, it’s the one that’s mounted halfway down the steering column.
You’ll see a metal rod running to it. It originates from the arm of the steering which you can move to switch the lights from dim to bright and vice versa.
Getting 12 volts at the dimmer switch connector means that you’ve just found the problem. Since the source wire is good and has power, the dimmer switch has gone bad.
When you have a faulty dimmer switch, your only option is to replace it. You can easily do it independently if you have access to a few basic tools.
A pointer for you before getting started is that the dimmer switch is made of plastic and it’s white. Now that you know what it looks like, here are the steps to doing it:
- Make sure the headlight switch is turned off.
- Take off the dashboard cover located under the steering column.
- Loosen the two steering column nuts almost all the way off to drop them down so that you have access to the dimmer switch.
- Remove the nuts and place the column on something so that the floor pan plate mounted to the firewall doesn’t get bent.
- Take out the old dimmer switch from the mounting slots.
- Put the new one in its place.
- Tighten the nuts, and put the steering column and the dashboard cover back.
That’s how you can replace the dimmer switch. Now, it’s time for the moment of truth. Turn your headlight switch and dimmer switch on to see if the low beams are working.
They should work if you’ve done the installment correctly. Otherwise, you can try installing it again if you made a mistake or take it to a professional.
6. Corroded Headlight Socket
The headlight bulbs in your 2000 Chevy Impala are plugged into sockets to make the electrical connections. With time, these sockets can get corroded. A number of issues can cause this including bad ground or moisture getting into the headlight assembly.
The final result of corroded sockets is that the connection with the headlight bulbs will be compromised and not work properly.
If you see your 2000 or 2003 impala low beams not working while the high beams are okay, it could be due to a bad socket as they’re on different circuits.
Take your headlights out using what you learned in the “How To Replace Headlight Bulbs” section. If the socket is indeed corroded, you can try cleaning it first. But it’s better to replace it altogether to prevent these issues in the long run.
7. Malfunctioning BCM
Wondering what would cause headlights not to work? The next thing you must look into is the BCM. The BCM or Body Control Module controls several important things in your car like chimes, lights, window controls, and so on.
Unfortunately, it’s not uncommon for them to get fried. And when that happens, your Chevy Impala headlights won’t work properly. Here are some other symptoms of a bad BCM:
- Your car battery starts draining excessively.
- Issues with the security system.
- Too many dashboard warning lights are turned on.
- The car fails to start.
To know for sure if you have a faulty BCM, you’d have to take it to a dealership and have it inspected with a Tech II scanner. That’ll reveal with 100% certainty whether it’s working or not.
Normally, you’d hope for another faulty part as the BCM is an expensive repair. You need to get a new one as they can be programmed only once. The dealership will program it using Tech II. It can easily cost $300 – $400 to have it replaced and programmed.
8. Worn Out Headlight Assembly
Are you still struggling with 2000 chevy impala headlight problems? Sometimes, your headlights won’t go out altogether but they provide a much dimmer light than they’re supposed to and they don’t lighten up the road.
If that’s the issue you’re dealing with, you’ll find out why it happens in this section. The most common factors behind it are:
- Headlights are losing their brightness as they’re exposed to prolonged use.
- Moisture getting into the headlight assembly and making the headlights foggy.
- Dirt in the headlight lenses.
If the light bulbs aren’t working properly due to their old age, you can simply replace them with new ones. That’ll get the headlights to work again. But if you’re dealing with headlight assembly issues, it’ll require a different approach.
First, you can try cleaning the headlights by taking them out if the lenses have gotten dirty. But if the lenses are foggy rather than dirty, it means water has gotten into the headlight assembly.
In that case, sometimes, digging a small hole in the headlight assembly can work to drain the excess water and remove the moisture. Regardless of whether it works or not, you can’t rely on it as a permanent fix. Eventually, you’ll have to replace the headlight assembly.
9. Electrical Issues
Of all the reasons we’ve discussed in our guide, this is the most unlikely one behind your 2000 or 2001 chevy impala headlights not working. However, it does happen in rare cases. So, you should know about it as well.
A common indicator that there are electrical issues behind your headlights not working is seeing dim headlights when the engine is idling but the brightness changes as you turn up the RPM.
The two most likely culprits behind it are either a bad alternator or a loose drive belt. So, check if your charging system is okay if you’re facing this issue. Start by inspiring the battery voltage. It shouldn’t be less than 12.6V.
If the charging system is fine and the drive belt is not loose, the next thing you need to ask yourself is if you installed any aftermarket components like a powerful amplifier or sound system. At times, they can be very demanding and require a lot of power.
In such cases, the charging system won’t be able to fulfill the demands of the electrical system even though it’s working properly. Dash lights and headlights often take the hit for these components
If you notice your headlights not working after you’ve installed such a device, then there is a high chance that the new component is causing the issue.
You can either take out that component or use a more powerful alternator to keep up with the new demands. These are the only two ways to get the headlights to work normally again in this situation.
What are the high-beam and low-beam bulbs in a 2000 Chevy Impala?
The part numbers of high-beam and low-beam bulbs in a 2000 Chevy Impala are 9005 and 9006 respectively. The same thing applies to the Chevy Impala vehicles from 2000-2005.
Why should you avoid touching the glass envelope of the headlight bulbs?
You should refrain from touching the glass part because oil or dirt can get to it from your hands. When that happens, the lifespan of the bulbs will be compromised.
Why do my dash lights stop working when I turn on the headlights?
In many modern vehicles, the brightness of the dash lights changes depending on the time of the day. So, you’d have to adjust the dash dimmer switch to solve this issue.
Why do turn signals malfunction when I use headlights?
The most likely culprit behind it is electrical issues. They can be damaged wiring, something wrong with the voltage, or an issue with the switch.
How to fix the grounding issue if the headlights don’t work?
Locate the bolt that connects the ground wire to the chassis. Once you find that, take off the wire and sand it. Sand the chassis as well for a much better ground.
Nobody wants to be driving in the middle of the road with malfunctioning headlights. If you find your 2000 chevy impala headlights not working as they should, don’t panic. Pull over safely to the side of the road.
Hopefully, the solutions mentioned in this guide will help you figure out what’s wrong with your headlights and fix them.
Start by checking the bulbs and continue with the other issues. Comment below if you have any questions about the 2000 Chevy Impala headlights.