The wiring that plugs into the bulbs is attached to the headlight, not to the car. There is a large 24-pin connector that connects the actual headlight to the car. The ballast and all bulb connections are after this connector on the headlight side.

Pinout chart I made up a while back showing the differences:



(I've had factory halogen, aftermarket H11 HID, factory HID without LED and factory HID with LED on my car).

Jeff

 

Awesome - Thanks for the information.

Steve

 

Ya tht what i thought so , thy shared same power harness connector but diff bulbs harness connector between oem D4s - H11 aftermarket HID .

Am i right ?

 

yes.......

10 char

 

This pinout was a great help/confirmation, and I want to thank Jeff for all his informative electrical input all over the forum. I've ran into his posts left and right as I've been researching my Sewell LEDs as well fog light and DRL wiring solutions, and he's always on point. Much appreciated!

One comment on the pinout above (and this is just referencing my original 07 HIDs and my 12 Sewell pinned LEDs), I believe that 7 is in fact the 'marker light +' (little orange LED on the side that is on both types of headlights) and 5 and 6 are the 'parking light' (that the LED headlights no longer have). In turn, Sewell, pins the LEDs (100% and ground) to 5 and 6, while 50% goes to the 'Lo/Hi Solenoid' (pointless).

The only reason I'm saying something is because I got a little confused with the marker vs. parking light. I was simply afraid of losing the orange marker's normal function if I took over pin 6. However, that is not the case. At the end of the day, both headlights (all, I believe) have the orange side LED marker, and that's pin 7 (unless Sewell switched it for no reason). While I agree 7 and 6 come on and off together, tracing them back to the front controller in the fuse box will result in different findings.

Why was I interested? Because I traced 6 back to the fuse box from both headlights and removed the pins from the molex connector (I didn't want to do this if it affected the orange markers, but it doesn't). Then I simply wired both very cleanly to a bussmann add-a-circuit off of ign2. This is an easy and virtually wire free solution to having the LEDs on 100% of the time at 100% brightness. Not mention I did it in a way that I can revert back to the original configuration very easily if I ever wanted. Just thought I'd add my findings in case someone else ran across the same info...

 

So basically, if I got factory hid headlights with hid, it's plug and play?

 

Yes plug and play the only headlight that's not plug and play is 2011+ headlight. All the low beam signal and high beam are same plug as all lexus IS i but in order to get the led strip to work it needs to be re pinned or rewire which is very easy to do

 

I would call it's wrong.
It's direct plug and play (everything work perfectly fine) except AFS cause halogen didn't has it but not major issue. I did the swap on is250 and haven't have any problem.

 

I would have thought some wiring would be required for the ballast.

Danny