I have a 05 F150 I purchased the HID Nation H13 BI-Xenon kit
This kit has been very frustrating for being a simple plug and play kit
At first both lights would flicker and tech support said it was a poor ground
I grounded both grounds bare metal to the factory ground locations
on each apron with the OEM bolt, tech support still insisted it was a poor
Ground so I added a 3rd ground straight to the frame where ford uses
For the main ground, that stopped the left headlight from flickering but
Not the right, Now tech support says to change the ballast on the right side
I did that and still flickers, I asked if there was a anti flicker capacitor
They offer they said to I stall the relay/resister/canceler loom to my kit
and that would solve all my problems, it did but only for a day, I emailed
Them back and there on the bad ground kick again. I can't stress to them
Enough the I have 3 grounds that I took to bare metal using a 24 grit angle
Grinder to on the Ford factory ground locations including the frame, when I
Research this online I see people with major flicker problems, but mine is
Very minor right light flickers about every 10 seconds, any help he would be
Greatly appreciated thanks

 

You might have purchased a cheaper. You need resistors to prevent flickering. Careful where you mount them because they get hot as hell and will melt plastic or wires.

 

Are you sure the bulbs aren't bouncing up and down rapidly? Like said above you should need a resistor. Its a resistance/load issue not a power issue hence the relay harness. So a resistor spliced or T tapped into the relay harness should fix the problem. And if the bulbs are bouncing up and down, would highly recommend not using your lights until its fixed. This will burn out the bulb or relay harness.

 

This kit was expensive $277.00 HID head and foglights, I installed the relay harness with 2 load resistors that are mounted on metal because they get extermely hot, the flicker on the right head is very very minor, I wanted to make a Youtube video and post it for help but it doesnt show up on camera just the human eye, People on youtube say to watch out for the cheap Chinaese ballast and the BI-Xenon kits,
No the bulbs arent bouncing up and down, they are firmly seated in there mounting locations on the back of the head lamp assemblys, you can see it prefectly at night on my garage door, but again wont show up on camera just the human eye.

 

Just because the price was high doesn't meant you got quality. On the kits I use no resistors of any sort are required.

 

What kit do you use?

 

True, But sometimes its hit or miss on HID kits and you might get lucky and may not have to use anything for your HID kit to work. Another factor is if your using a DC HID Kit .