Big thanks to JtzMax for helping me out on this. It should be beneficial to others who either have a quad retro or just want the low beams to stay on when they flash their highs with their non-retro'd R34's.

I know most would prefer it that when you hit the highs, the lows stay on but with our 9004 headlight system, it's not really an option. Usually it's either one or the other but with diodes, the job can be accomplished.

Disclaimer:
This modification to your headlights is done at your own risk and can only be done with a R34 set up (as far as I know). I will not be held responsible for any damage that may occur.

The diode that you will need is a 1N4007 diode (1 amp, 1000 volts). From there it's pretty simple. If you have a quad retro with a relay wiring harness, bridge one diode over the high and low terminals on the driver side harness that is used. If you don't have a retro, bridge one diode over the high and low terminals on each original harness. You can also solder the diode(s) into the original wiring if you'd like but I didn't go that route.
IMPORTANT:For either set up, the side of the diode(s) that has the silver stripe goes on the low beam terminal while the other side goes on the high beam terminal.

Now you're done! Just test your lights to make sure they work properly. If the diode didn't work, you might have installed it backwards (silver stripe on the high beam terminal instead of the low beam terminal), shorting out the diode and you'll need a new one. You also might not have inserted it correctly so check that as well.

I really love this quick fix for R34's (retro'd or not). They now look and perform better than before. Personally, I hooked up the wires from the high beam solenoids in my FX35's to the J30 high beam bulbs so that when I hit the highs, those bulbs turn on and the cutoff shield in the FX35's flip down but now my low beams stay on as well so these high beams are serious.



*The only minor negative to this is that when the lows are off and you hit the highs, the lows will turn on along with the highs but it's not a big deal.*

PS: I have a few diodes left over so if you'd like me to do a retro for you and are interested in this kind of set up, just LMK and I'll include one for ya free of charge.

Enjoy!

 

Nice work man, Makes me wish i still had my 4th gen, Those retro's look insane

 

Thanks man. The headlights are my favorite mod. I figured this would be helpful for anyone with or without retro'd R34's.

Everyone enjoy! And Happy Thanksgiving!

 

long time comin haha nice write-up

 

I know right!? lol Thank you.

 

any pics Chris?

 

Pics of what exactly?

 

of how you did this.
the terminals and how you placed the diode.

thanks

 

This is a really nice mod man. With or without retro cause the stock r34's output sucks

 

really nice set up bro look good!

 

I'll have a pic up later on today for ya.

Output is still gonna suck without a retro but at least you can run your lows and highs together for "better" output lol

Thanks man I appreciate it.

 

that was going to be my next question if ya had any pics of exactly what ya did and where it is, things like that

 

also i saw you post on another forum are you relly going to do that projet with you taillights?