How to Mount an HID Ballast

What You'll Need
HID ballast kit
Safety goggles and gloves
Baking soda
HID bulbs
Cable ties
Double-sided tape

An HID ballast is required in order for HID lamps to operate. This device provides the lamp with the starting voltage it needs and limits its operating current as well. Mounting the ballast needs at least a good understanding of car installations.

Step 1 - Disconnect Battery Terminals

Locate the car battery and remove detach the terminals prior to the installation of the ballast. Wear safety goggles and gloves for protection. Mix a 50:50 ratio of baking soda and water and pour it over the terminals to clean them. Wipe the solution from the terminals and unscrew both negative and positive terminals using a wrench. Pull out the terminals from the battery.

Step 2 – Remove and Replace Factory Headlights

Disconnect the low beam bulbs from the factory headlights. Sometimes, this may also require removing the housing to ensure that the HID bulbs and ballasts have enough room for installation. Now, replace the factory headlight bulbs with the HID bulbs by installing them accordingly. Make sure not to touch the surface of the bulbs as they may get contaminated with oil and get damaged when they overheat. Connect the bulb to the ballast by plugging using a fixed cable provided in the HID installation kit.

Step 3 – Determine Where to Mount the Ballast

A good mounting location should be away from too much heat, dirt and water, but close enough to the headlight because they are powered through the factory headlight’s harness. Also, the ballast should be mounted away from any moving part and on an area with good ventilation.

Step 4 – Mounting the HID Ballast

If the ballast has mounting brackets included in the kit, use this to mount the device in the best possible mounting location. In some car models, the device can be fit easily inside the headlight cover. Sometimes, it has to be screwed to the cover. Never drill holes through the ballast. Always use the mounting hardware provided in the kit.

If using a mounting hardware provided in the kit is not a good choice for the chosen location of the ballast, do not use superglue. Make use of a very strong double-sided tape instead. To increase the mounting strength, make use of cable ties. Find holes near the side of the frame where the ties can be slipped through.

Step 5 – Complete the Installation

After mounting the ballast securely, complete the installation as instructed in the manufacturer’s manual. In the engine bay, run the wiring harness and make sure it does not get too close to any moving parts. Reconnect the battery terminal cables and turn on the lights for testing.

If you are not too familiar with car installations and get stuck in one of the steps above, it is recommended you hire a professional to complete the mounting of the ballast.