So I finally got my new headlights retrofitted with projectors and am sorting through the wiring. My truck is a sport so it has dual beam headlights. I currently only have the low beam wired to the ballasts because if I wire up both the current backfeeds through the high beam circuits and my high beams stay on. Here's a quick drawing of what I have:




So here's what I'm thinking; add a diode On the high beam wiring before the splice of the high and low beam circuits. My question is: how big of a diode do I need? Would 5 amp suffice?

I'm thinking this would work:

 

No. It looks like your diode will carry the whole current for the bulb. What is its wattage?

 

Not sure? The wires are going into a 35watt ballast so 35w?

 

Then 5 should do it.

 

Ok, cool thanks, btw here's a couple pics:

 

Let us know how they light up the night.

 

They are a huge upgrade over the sport headlights. I'm running 4300k HID bulbs and love it!