HID Flickering Problem – Reason and Solution

hid conversion kit flickering problem solution 2 300x225 HID Flickering Problem   Reason and Solution hid conversion kit flickering problem solution 3 300x225 HID Flickering Problem   Reason and Solution

First of all, what is a flickering problem?  Flickering problem means your HID output is not steady.  If your HID is outputting a dim-bright-dim-bright pattern or even worse, an on-off-on-off pattern, it can also classified as HID flickering problem.  Different reasons can lead to flickering problem, but in most case, a capacitor or warning canceller can solve the problem.  Let us explain in more detail so you guys know what is actually happening with the HID kit and what is our solution to solve the problem.  Here are couple youtube videos to show what is flickering problem:

Look at the fog lights from the passenger side:

HID flickering problem on the headlights:

A more serious HID flickering problem on the headlights:

Why is the HID flickering?

HID lights are high-output, low-resistance devices. To operate correctly, they require ballasts to control their current and voltage. If your vehicle is not designed for HID lights, the resistance of its electrical system may result in fluctuating power being sent to the lights, causing them to flicker.

Daylight Running Lights

If your vehicle has daytime running lights, only 20 watts or so of power will be sent to the lights rather than the 35 watts required for them to operate correctly. This, too, will cause HID lights to flicker. You can solve this problem by disabling daytime running lights, which isn’t difficult.

Headlight Fuse

If a vehicle’s headlights are running on a 10 or 15 ampere fuse, the amount of power delivered to HID lights may be insufficient to prevent them from flickering. Replacing the fuse with a 20-amp version will reduce the resistance and increase the amount of power supplied to the headlights without overloading the wiring.


How to solve HID flickering problem?

To work properly, xenon high intensity discharge headlights require the vehicle’s direct current power to be converted to high voltage alternating current. This is accomplished through a ballast, which provides a voltage to the headlamps when they are switched on. A common cause of flickering HID headlights is voltage that is too low being sent to the ballast.

Causes of Low Voltage

Low voltage in your vehicle’s electrical system can be caused by a defective battery, a poorly performing alternator or the use of daytime running lights. In addition, some newer vehicles have sensors that activate by sending a low voltage to the headlights when they are turned off.

Using a Relay Harness

A relay harness allows the ballast to draw electricity from the vehicle battery directly, which eliminates low voltage issues. In some cases, a capacitor is needed to work together with the relay harness to ensure proper voltage is applied to the ballast.

Incorporating High-Power Capacitors

High-power capacitors allow increased power to reach the ballast, which will then feed the proper voltage to the headlights. This is the most common fix for flickering HID lights and often solves other problems, such as eliminating the “headlights out” indicator on your dashboard display.

Installing Resistor Packs

Using a resistor pack will cause the vehicle’s electrical system to send the same voltage to the xenon lamps as it would if halogen bulbs were installed.


If you got a HID kit from modifystreet and it is flickering, what should you do?

Our HID conversion kit is with great quality, but it is hard for aftermarket HID kit to avoid flickering problem because it might have conflict with your system.  So if your HID kit is flickering after installation, here are couple things you should do:

1. Check your ground and make sure your ground is good.  Try to sand down your ground and see the problem is resolved or not.

2. If the problem happens on one side only, try to switch the ballast from left to right and see if the flickering problem switches side as well.  If the problem switches side, you might get a defective ballast and we can simply replace a new ballast for you to resolve the problem.

3. If you have a newer model vehicle, especially BMW, Audi, Mercedes Benz, Dodge (especially Dodge Ram), Chevy or Ford, it is common that your system is trying to adjust the current to the aftermarket HID kit, so the output is not steady.  In such case, you can try to install a HID warning canceller and see the problem can be solved.  Check out the warning cancellers on modifystreet.

4. If nothing works for you, feel free to contact us and let us assist you.  We always stand behind our products, so if your HID kit is flickering and we are not able to solve the problem for you, we will definitely take the item back and issue you a full refund.



Posted by at June 14, 2012
Filed in category: HID Kit, Products, and tagged with: , , , , ,

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