Skip the auto shop - Our mechanics make house calls

Q: Wiring issue with headlights.

asked by on

The headlight bulb on the passenger's side was replaced, but the replacement bulb flickered on and off. I was told it is a possible wiring issue. I need a diagnostic to determine what is wrong so I can get it fixed.

A: Hello, there a two kind of lighting systems...

Hello, there a two kind of lighting systems, halogen and xenon. To start (both systems) make sure that it's not the bulb. You can swap the bulbs left to right and see if the condition changes on each side. With xenon, swap the ignitor to see if the fault moves. If the condition stays on the right side then the wiring should be checked. I would start with the ground, and be sure that it is tight with good clean contact. If the ground is good I would check the wiring for opens by moving the wiring slightly to simulate vibration present while driving. You may need the aid of a mechanic to test and check the wiring to get your headlights fully running again.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Does the OBD system use more than lights to communicate with the driver?

Malfunction Indicator Lamps (MIL) and audible alarms are currently the only means by which the On-Board Diagnostics (OBD) system can inform the driver of any issues that adversely affect the operation of the engine or other electronically controlled system. The...

Q: Found oil leak when changing spark plugs

Hi there. This is very common on your vehicle. This is caused by the valve cover gasket tube seals. These fail all of the time because they become brittle as the engine gets older. Once that occurs, they start to...

Q: sounds like it dont shift out of 3rd gear i hear a humming sound

Hello. P0001 is a code for a problem with the fuel volume regulator circuit. The fuel volume regulator is the component responsible for regulating the amount of fuel that is consumed by the engine. If the regulator has a problem,...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...