The headlight bulb is located inside a
water tight headlight lens connected to the wiring harness using a weather tight
electrical plug to help repel damage causing moisture. Headlight bulbs are a
common failure but with a little guidance anyone can change out these bulbs. This process is a little
different for each car but this guide will give you an idea of what you are in
for when doing the job.
What goes wrong?
As the headlight bulb ages, the filament inside becomes weak and finally
breaks causing the bulb to stop working. On LED bulb systems a voltage boosting
ballast is used to power the bulb from the car's 12 volt system which can overheat and fail more so then the bulb. Also because of the amperage used to run
the bulb occasionally you may find a melted electrical connector at the bulb
which will hinder bulb operation
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Headlight Bulb
Easy to replace (most cases)
Can melt the electrical connector
Failed voltage ballast
Do not touch glass part without gloves
Is located inside the headlight lens
Illuminates roadways in low light conditions
What will it cost?
The cost for a typical headlight replacement bulb will range from $12.00 to $25.00 US for
non LED systems. A garage or dealership will charge between $85.00 and $140.00
US for the same job. LED systems cost slightly more and can require a ballast as
well.
Let's get started
This guide pertains to most cars, configurations maybe slightly different but
the process is the same. If you need specific instructions for your particular
application please ask our technician.
The following shows a typical headlight bulb replacement. (This application
requires the removal of the headlight lens)
A headlight bulb uses more amperage than other bulbs in the lighting
system so it a good idea when you are changing the bulb out to inspect the
electrical connector for heat damage. If the headlight bulb socket is not accessible the headlight lens may need to
be removed or obstructions behind the bulb removed to gain access to the headlight
bulb socket. Some headlight bulbs can be replaced by simply grasping the bulb socket
behind the headlight lens and turning it counter clockwise to remove it. This will
expose the headlight bulb.
Locate the release pin or screws which mounts the headlight
lens. Pull forward and upward on the pin to release, or remove mounting screws
or clips.
Grasp the lens firmly to avoid dropping the unit. Use a standard
screwdriver to release the wiring connector. Check the connector for melted
plastic which is a sign the connection has overheated in which case the
connector will need to be replaced. Also if corrosion is present it will hinder
the voltage/amperage supply to the new headlight bulb producing a
dim or light operation
failure.
Grasp the headlight bulb and turn counterclockwise, or undo mounting
clip or screws to remove the bulb from the housing. Some bulbs can be
removed with the wiring harness attached.
Match the old bulb to the new unit confirming the electrical connector
configuration along with the mounting plate of the bulb. Clean the headlight
lens free from debris to help maintain the seal of the bulb to the lens, this will help keep moisture
out. There is an alignment notch or tab that must be recognized when
reinstalling the new bulb. If the bulb is installed incorrectly the light
beam will be off (high, low, left or right). Reconnect the electrical
connector ensuing an audible click which confirms the connection of the
connector while sealing the bulb from moisture. Reassemble the lens or
any other obstructions to complete the job. Turn the headlight on to check
your work, observe the newly replaced headlight bulb to ensure proper
operation.