Why are the headlights not working on my Chevy?
A wiring issue will require a check of wires with a multimeter with the help of your vehicle’s schematics. Only the low-beams or high-beams work: If your headlights both work but only when the low-beams or high-beams are on, the problem is likely with the dimmer switch.
What should I do if my alternator is not working?
The solution is to check your car’s manual for the particular fuse that controls the alternator and replace it. In some cars, you might also find another small fuse to the alternator’s control—usually a 15A to 20A fuse. An alternator does usually has 3 or 4 wires to it to function properly.
Why is there a noise coming from my alternator?
Noise from the alternator could be caused by a faulty rotor shaft, rectifiers, bearings, slip rings, stator winding or brushes. You will need to carefully inspect each of these components and replace them. One sure way of confirming that the noise is coming specifically from the alternator is to use a vacuum hose.
What to do if both side of Your Headlights are not working?
Neither side works: If both headlights are dead, it’s probably not a problem with the bulbs, but it’s worth a check. The most likely scenario is that the fuse is bad. Remove the fuse for the headlights and check it. When a fuse is bad, it’s obvious because the filament will have a gap in it.
What are the symptoms of a bad alternator in a GMC Sierra?
Here are the most common symptoms of a bad alternator in a GMC Sierra: The battery light is designed to tell you that there is not enough voltage to properly charge the battery, or that the battery itself is not holding the proper voltage. In rare occasions the service engine soon light may light up.
When to replace the alternator in a Chevy Trailblazer?
With the engine just fired up, you should get over 14.2 volts. If you got 14.2 or more volts, the alternator is charging fine. If it’s still showing in the 12’s, it’s time to replace the alternator. If it’s producing a voltage level in the 13’s, go ahead and take it into a parts store and have it tested. It’s probably bad.
A wiring issue will require a check of wires with a multimeter with the help of your vehicle’s schematics. Only the low-beams or high-beams work: If your headlights both work but only when the low-beams or high-beams are on, the problem is likely with the dimmer switch.
What does it mean when an alternator light comes on?
If the light illuminates only intermittently, it usually indicates a loose or worn drive belt or serpentine belt, worn-out or bad carbon brushes in the alternator. But remember that the light doesn’t always mean there is a bad part; the light may be triggered by a sensor giving a wrong message or there’s something wrong with the circuit itself.
What are the headlights on a GMC Sierra 1500?
Headlights on my 2014 GMC Sierra 1500 slt are totally inadequate on high or low beam. The lighting distance is inadequate and is so directional that there is no side flair lighting for turning like you have with conventional headlights.
Where to replace LED light bulbs on GMC Sierra 1500?
The contact stated that the vehicle was taken to varney Buick GMC Mazda (260 hogan rd, bangor, me 04401) where the bulbs were replaced under a technical service bulletin however, the bulb replacement failed to fix the failure. The contact stated that he replaced the bulbs twice with led bulbs however, the failure persisted.
What causes a burnt out light bulb on a Chevy?
A burnt out bulb is usually discolored and pieces of the filament will be loose inside the bulb. If a visual inspection shows the bulb is still good, there may also be a broken wire in the harness to that light.
Why are my headlights quitting on my 1998 Chevy Silverado?
My headlights totally quit on my 1998 Chevy Silverado K1500. I tried pushing the emergency break up and down to try to make the switch kick in but nothing happened. I have the running lights just no high/low been when you turn the headlight switch on.
Why are my headlights not working in high beam?
If just one bulb fails to work in either high beam mode or low beam mode, it may be the bulb. Most headlight failures that are limited to just high or low beams are related to a relay or the high beam control switch.
Can a bad headlight cause a car to burn out?
The main exception is when one headlight burns out first, goes unnoticed for some time, and then the other bulb also fails. If you suspect that the bulbs may be bad, and you own a voltmeter, you may want to start the troubleshooting procedure by checking for power at the headlights.
What to do if your headlight bulb is not working?
Before you write off your headlight bulb as bad, it’s important to look at the electrical connector for any signs of damage or corrosion. If the connector has come loose, pushing it back on may fix the problem. However, you’ll still want to dig a little deeper to figure out why it came loose in the first place.
Why are my Chevy Trailblazer lights not working?
Still, headlight problems are no problem with the right information. Whether your Chevy TrailBlazer lights aren’t working, or your Chevy Corvette, the following diagnostic process will help you figure out why your Chevy’s headlights aren’t working.
What kind of headlights does the GMC Sierra have?
Historically, automakers have at least used dual-filament bulbs for low / high beams. “The headlights are terrible, low beams are absolutely useless and high beams are only slightly better.” For 2016, GM “refreshed” the Sierra design with a new grille, front fascia and yep … headlight design.
What should I do if my Chevy headlights are not working?
To check alignment, park about 10 feet from the garage door wall and turn the lights on. Low beams should be aimed straight forward and hit no higher than your hood line. The high beams should move slightly, but not too much higher than the low beams.
Why do GMC trucks have such terrible headlights?
The headlights in the 3rd generation (2014–present) are so dim, you’d probably get better illumination from a jar of fireflies taped to the bumper. GMC changed the design for 2016, leaving owners of previous model years wondering if they’ll be left in the dark?
Still, headlight problems are no problem with the right information. Whether your Chevy TrailBlazer lights aren’t working, or your Chevy Corvette, the following diagnostic process will help you figure out why your Chevy’s headlights aren’t working.
What does it mean when parking lights wont shut off?
SilveradoSierra.com • Parking Lights won’t shut off! : Electrical Parking Lights won’t shut off! My truck developed a problem while sitting in the driveway – the parking lights decided to turn on, and will not shut off.
Why are the lights on my car not working?
Headlights work, but not very well: If your headlights don’t provide enough light for the road ahead, it can come from several problems. Fogging of the lenses, clouding inside the housing, moisture inside the housing, and headlights that are not aimed properly are the most common causes.
A burnt out bulb is usually discolored and pieces of the filament will be loose inside the bulb. If a visual inspection shows the bulb is still good, there may also be a broken wire in the harness to that light.
Neither side works: If both headlights are dead, it’s probably not a problem with the bulbs, but it’s worth a check. The most likely scenario is that the fuse is bad. Remove the fuse for the headlights and check it. When a fuse is bad, it’s obvious because the filament will have a gap in it.
Why are my high intensity discharge ( HID ) headlights not working?
High intensity discharge (HID) headlights can also fail due to other associated components. Neither of the headlights work. The cause: Burned out bulbs, or an issue with power or ground. The fix: Check for power and ground, and fix if necessary. Otherwise, replace the bulbs.
Why are the lights on my truck not working?
So…no headlights work, brights, low beams, or plow lights. I can not switch off the brights indicator on the dash. But the running lights and turn signals work fine. This all happened after I was crawling around under truck looking for leaky brake line…did I bump somthing loose?
Why is the ignition switch on my GMC Sierra not working?
The ignition switch is responsible for sending power to the accessories. So, if you find yourself in a situation where your Sierra runs, but nothing else in it works, it may be a bad ignition system causing your problems.
High intensity discharge (HID) headlights can also fail due to other associated components. Neither of the headlights work. The cause: Burned out bulbs, or an issue with power or ground. The fix: Check for power and ground, and fix if necessary. Otherwise, replace the bulbs.
How many bulbs are in a GMCs high and low?
F.Y.I. The high and low is only 1 bulb per side. The GMCs have a shutter that covers the bulb slightly in low mode and when in high mode the shutter moves up out of the way and exposes the whole bulb to shine through the projector lenses. We apologize for this headlight concern you’re experiencing!
F.Y.I. The high and low is only 1 bulb per side. The GMCs have a shutter that covers the bulb slightly in low mode and when in high mode the shutter moves up out of the way and exposes the whole bulb to shine through the projector lenses. We apologize for this headlight concern you’re experiencing!
How to test a 1995 GM headlight switch?
OEM (Original Engine Management) Part # HLS24. Wells Part # SW932. If this headlight switch tutorial does not apply to your GM pickup or SUV, there’s one more headlight switch tutorial for 1995 or newer GM pickups that you can find here: How To Test The Headlight Switch (4.3L, 5.0L, 5.7L). Contents of this tutorial:
What are the symptoms of a bad headlight switch?
Symptoms Of A BAD Headlight Switch. The most common and the most obvious symptom of a BAD headlight switch is that the headlights (headlamps) don’t come on when you turn the headlight switch on. You’ll also see: No park lights. No instrument cluster illumination.
Headlights work, but not very well: If your headlights don’t provide enough light for the road ahead, it can come from several problems. Fogging of the lenses, clouding inside the housing, moisture inside the housing, and headlights that are not aimed properly are the most common causes.
OEM (Original Engine Management) Part # HLS24. Wells Part # SW932. If this headlight switch tutorial does not apply to your GM pickup or SUV, there’s one more headlight switch tutorial for 1995 or newer GM pickups that you can find here: How To Test The Headlight Switch (4.3L, 5.0L, 5.7L). Contents of this tutorial:
Symptoms Of A BAD Headlight Switch. The most common and the most obvious symptom of a BAD headlight switch is that the headlights (headlamps) don’t come on when you turn the headlight switch on. You’ll also see: No park lights. No instrument cluster illumination.
What are the symptoms of a bad or failing headlight switch?
Issues with the high beams Another symptom of a bad or failing headlight switch is issues operating the high beams and more specifically, issues keeping the high beam engaged. Most headlight switches operate by pulling the lever backwards and locking it into place to activate the high beam headlights.
Why are headlights not working but high beams are?
Corrosion, a bad ground, or some other issues can damage the sockets and disrupt the power flow to the bulbs. If only the sockets of the low beams are bad, it will cause headlights not working but high beams are.
Why are my GM running lights not working?
By routing the power in series through both HIGH beam headlights, each light burns at half brightness. GM and many other car makers choose the HIGH beam headlights as the DRL source to avoid burning out the filaments in the low beams. Check the EXT LTS fuse.
Why does my GMC Jimmy have a blinking dash light?
Blinking dash light means the sensor did not work/actuator did not work/ or the TCCM computer is confused – yes it can happen. After you check all operations try and disconnect the battery for 30 min and then retry and that should have cleared any error.
What should I do if my headlight light is not working?
The best way to do this is to turn the headlight switch on, connect the negative lead on your meter to a known good ground, and touch the positive lead to each headlight connector terminal. One of the terminals should show battery voltage, and the other two should show nothing if the problem is burned out bulbs.
What kind of headlights do GMC Sierra 1500s have?
2014 GMC Sierra 1500, Last night I got into my truck and neither my high beams or low beams would turn on in my truck. The fog lights, turn signal/marker lights, and tail lights all work.
How can I tell if my headlamps are working or not?
The fog lights, turn signal/marker lights, and tail lights all work. I tried auto and on on the switch. I tested for power at the headlight fuse and did not have any with the headlights turned on. The light on the dash turns on indicating that the headlights are turned on. Any ideas where to look?
How do you remove a headlight assembly from a car?
Some vehicles have a separate daytime running light assembly, but most vehicles simply use the headlight assembly. Most vehicles have their light assemblies secured to the vehicle with screws. Use a Phillips screwdriver to remove the light assembly. Place all of the screws in a safe place so that none of them are lost.