Skip the auto shop - Our mechanics make house calls
  1. Home
  2. Articles
  3. How Can the Light Bulb Wiring Become Damaged?

How Can the Light Bulb Wiring Become Damaged?

wiring

Your car is as much electrical as it is mechanical. Wiring harnesses snake their way around the engine bay, and throughout the cabin of the vehicle. Most of your accessories run on electricity, and even the engine needs a constant supply of voltage in order to run. Your headlights most certainly run on electricity, and that’s supplied by a wiring harness. However, light bulb wiring can be damaged in a number of ways.

  • Rodent damage: One of the most common (and most surprising) sources of damage to light bulb wiring is from rodents. This is particularly common during the fall, when squirrels, mice, and other rodents are seeking warm places to build their nests. They’ll gnaw wiring for use in their nests.

  • Melting: If your wiring harness is not protected with the right routing (the wiring isn’t secured and out of the way) it’s possible for it to contact any number of hot surfaces under the hood. While the wires can tolerate hot ambient temperatures relatively well, they can’t tolerate direct heat.

  • Vibration-related wear: Every part of your car vibrates when the engine is operating, and if your wires aren’t secured properly, it’s possible that they will contact another component while the car is running. Over time, this can lead to abrasion – the insulation is actually worn through, exposing the inner wire and potentially creating a short.

  • Accident damage: Another very common cause of light bulb wiring damage is from a front-end collision. Even seemingly minor accidents can cause hidden damage, including tearing or breaking your headlight wiring harness.

  • Broken solder points: While most of the wiring for your headlights is continuous, there are solder points in several key places. These are weak points, and subject to breakage over time (heat, vibration, frequent replacement and other factors can lead to damage).

As you can see, there are many ways that your light bulb wiring can be damaged. Once damage occurs, you’ll need to have it repaired by a professional mechanic.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
Icon-warranty_badge-02

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

More related articles

What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
P0359 OBD-II Trouble Code: Ignition Coil I Primary/Secondary Circuit Malfunction
P0359 code definition The P0359 code indicates that a fault has been detected in one of the vehicle’s ignition coils, generally the number 9 coil. This code can also be associated...
P0477 OBD-II Trouble Code: Exhaust Pressure Control Valve Low
P0477 code means that the PCM has detected an abnormally low voltage reading often due to the exhaust back pressure control valve circuit.

Related questions

Q: Q: Turn signals don't work

Hi there. Check the fuse to the turn signals and see if its blown. If the fuse is not burned, then check the wiring from the switch to the turn signal lights. Use a digital ohm meter and see what...

Q: During rain, dashboard lights & radio fade out - 1999 BMW 332is

Probably one or more electrical connections are getting wet when it rains. The wheel speed sensor for example is at wheel level (inside the wheel arch), and catches all sort of road spray. Once you find the problem connectors, spray...

Q: No power to the ignition.

When hooking up the battery cables backwards, the polarity of the voltage is reversed and will cause the fuses to pop, the alternator to burn out the regulator, and the computer (ECM) will burn up the ground circuit inside the...