Headlights going in and out.

My headlights won't turn on consistently and tend to go out. In addition, my interior lights and car radio flash on and off when I hit bumps in the road.
Experienced mechanics share their insights in answering this question :
Looking at the wiring diagrams for your vehicle, I see that both the radio and courtesy lamps (interior lights) share a common ground. It could be this ground it is not making good contact and gets disturbed when going over bumps. There is a technical service bulletin (TSB) #18-003-05 for the headlight issue which says the control module needs to be flashed. However, the vehicle would need to be inspected in person for a definitive answer. I suggest calling a professional, like one from YourMechanic.

How to Identify and Fix Common car Problems ?

Our sources include academic articles, blog posts, and personal essays from experienced mechanics :

Automobile LED headlight clusters combine high and low beams, daytime running lights, and sometimes signal and clearance lights into a single headlight cluster.
Its primary purpose is to control the intensity of your car headlight. It also controls the intensity of the bulbs so that they are not using up all your power.
When you turn on your headlights, that switch activates a relay. That relay, in turn, actually provides the electrical connection between your headlight bulbs and the battery. Fuses are also involved in order to provide a sacrificial failure point to protect the rest of the wiring.
The Light Control Module (LCM) is an important component of a vehicle because it controls all of the car`s lights, as well as the horn function.
Electronic technology has advanced so that an electronic control unit (ECU) is required to control the functions of full LED automotive headlights. An ECU consists of mainly LED drivers for headlight functions such as high beams, low beams, daytime running lights, position lights, turn indicators and fog lights.
Any signs of condensation inside the headlight housing may indicate that water is leaking into the housing. Water and electricity don`t mix and any condensation may cause a short circuit leading to failure. Also, any condensation coming in contact with a hot bulb may cause the bulb to break.
The likely cause is a fuse, headlight relay, headlight switch, dimmer switch or a wiring fault. About the only cause that is an easy fix is a blown fuse. Consult your owner`s manual to locate the main fuse for the headlight circuit and replace that fuse with one having the same amp rating.
its in the pdc next to the battery. there is a cover covering the fuse box and on the flip side of the lid it will be labeled headlamp relay.
To adjust the beam height of your car`s headlights, locate the adjustment screws or levers on the back of the headlight assembly. Once you have these, you will need to work on raising the beam of your car`s headlights. To raise the beam, turn the top adjustment screw or lever clockwise.
Instructions. It`s not uncommon for a vehicle to have panels or parts that need to be removed in order to change headlight assemblies. These procedures are usually simple, but a little time-consuming. If you`re not completely comfortable doing the job yourself, we`d be happy to recommend a professional technician.
The four main parts of your headlights include the housing, the regular beams, the high beams, and turn signal bulbs. The housing is the hard-plastic cover that you see when you are looking at a vehicle head-on. The regular beams are what is activated when you turn on your headlights or use your daytime running lights.
Modern headlamps are electrically operated, positioned in pairs, one or two on each side of the front of a vehicle. A headlamp system is required to produce a low and a high beam, which may be produced by multiple pairs of single-beam lamps or by a pair of dual-beam lamps, or a mix of single-beam and dual-beam lamps.
Headlight assembly, also called a headlamp or headlight in automobile vehicles, is a pair of lights attached to the car`s front. They illuminate the route ahead and assist the driver in seeing traffic. The headlamp is the connected device, and the beam of light from the headlamp is called the headlight.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

My headlights came on and drained my battery I put a new battery in and my headlights still wouldn’t go off I took out the bulb an
ANSWER : The common thread between the headlights and the signal lights is the combination switch. The combination switch controls your signal lights, turns the headlights on and off, as well as controls the high beam function. Most like;y the switch or wiring to the switch has an electrical short. This can cause constant power going to the functions the switch controls. While the combination switch is the most likely cause, wiring can also be a problem so I suggest having a certified technician look into the lights staying on to determine if there is a wiring issue before replacing any components. If the combination switch is found to be the culprit, the technician can replace it for you.

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My car won’t go past 35mph
ANSWER : Hi there. From the description you provided, your vehicle has problems with the transmission again. You stated it will not shift into 3rd gear again, like before the transmission was rebuilt. If the transmission is again the problem, it should be covered under warranty. It could be a faulty shift solenoid. The shift indicator not reading properly could be a faulty transmission position sensor. If this is an overall lack of performance issue, according to your last statement, then possibly you have a restriction in the exhaust system. I recommend having your vehicle’s problems inspected and diagnosed by a certified technician from YourMechanic.

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I bought a used car 2010 nissan versa and when I go uphill it slows down alot. When going uphill it says go 60mph I am at that sp
ANSWER : Hi there. When a car is slow to accelerate it can be caused by multiple issues, ranging from fuel systems that are clogged or damaged to an ignition system component failure. It is also possible that something in the driveline system is dragging which causes the lack of acceleration. Since there are so many different possible issues, the best way to start the diagnosis process is to have a professional mobile mechanic from our team come to your location and complete a car is slow to accelerate inspection.

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Headlight Issue
ANSWER : Hello.

The daytime running lights are not supposed to function at the same time as the headlights. The daytime running lights are only supposed to come on during the day, to provide additional visibility for daytime driving, independently of the headlights. When the headlights are turned on the daytime running lights should turn off. If they are not turning on it may be possible that perhaps the bulbs have burned out, or there is an issue with the fuse or relay. If you run into any issues, consider contacting a certified technician, like one from YourMechanic, as certified technician can diagnose any issues with your lights firsthand and help you make the right repair.

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I turn my high beam headlights on and both headlights go out.
ANSWER : Hello, thanks for writing in about your Nissan Frontier. The only way to tell if it is the light bulbs or the switch is to check for power to the bulbs when you switch to high beam. Most of the time both bulbs are bad. The connections to the bulbs could be faulty as well. If you’re unable to pinpoint the issue, have a certified technician, like one from YourMechanic, diagnose your lights firsthand for an accurate repair.

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Shifting from 2nd to 3rd, car stopped going fast. Now it won’t go at all.
ANSWER : It is possible that your clutch has failed. The sound you are hearing is likely due to the clutch not engaging with the engine due to it being worn. I would recommened having your transmission inspected by a qualified transmission expert to determine if your clutch requires replacement in order to resolve this issue. This inspection may require removal and partial disassembly of the transmission in order to verify that the clutch has failed.

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Air flow going up and down when gauges go up and down
ANSWER : The electrical system on these vehicles are known to have an issue with fretting corrosion buildup in multiple electrical connectors throughout the vehicle. An affected system would need to have that electrical connection disconnected, cleaned, and a dielectric compound put on the connection to fix the issue. You will need to have a mechanic, such as one from YourMechanic, isolate the failing components, and conduct an electrical problems inspection, such as the one described, for you.

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I put my car in drive but it won’t go but it will go in reverse what could be wrong
ANSWER : Hi There,
What you are describing may be a result of a faulty speed sensor, potentially low transmission fluid or a even a faulty transmission control solenoid. As your vehicle travels down the road, the computer analyzes data being sent by vehicle speed sensors and engine speed sensors. Based on this information, the Engine Control Unit (ECU), or the Transmission Control Unit (TCM), executes the appropriate upshifts and downshifts by sending a signal to one of several shift solenoids. These transmission solenoids have spring-loaded plungers inside them, which are wrapped with wire. When this coil of wire receives an electrical charge from the TCM / ECU, it causes these plungers to open, allowing transmission fluid to flow into the valve body and pressurize the desired clutches and bands. When this happens, the transmission changes gears and you continue down the road. The computer controls the transmission solenoid in several ways. If the vehicle is equipped with a dedicated Transmission Control Unit, it can open or close the hydraulic circuit using a direct 12v signal. In some cases, the Engine Control Unit (ECU) can control the solenoid’s plunger by turning the ground circuit on and off. When this is not working properly, this can cause a jerking reaction, a delay in shifting or in some cases may cause the transmission to hesitate in shifting gears. I would recommend having a professional from YourMechanic come to your location to diagnose and inspect your transmission.

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