Helpful hints on JDM Headlight wiring by Train - The Acura Legend & Acura RL Forum
Acura Legend Forum Acura Legend Forum
 

Auto Insurance

» Featured Product
Wheel & Tire Center

Go Back   The Acura Legend & Acura RL Forum > Shop Talk > DIYs

DIYs These threads contain answers to common topics. "Do it yourself" modifications are also archived here.

Acura-Legend.com is the premier Acura Legend Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Rate Thread Display Modes
Old 11-20-03, 04:56 AM   #1 (permalink)
Registered User
 
Join Date: Jan 2002
Location: N Canton, Ohio
Posts: 9,173


Car 1: 3.5L 1991 LS Coupe 5 Spd Blk/Blk
Car 2: 1999 Acura 3.5RL
Car 3: 2004 GMC Sierra Z71


iTrader Score: 5 reviews
Send a message via AIM to Mike Diaz
Helpful hints on JDM Headlight wiring by Train

Originally posted by Train:

1. First off, you CANNOT use H4 bulbs with the one-piecers unless you modify the base first. The base of the H4H is a lot smaller than that of the H4, so you'll have to trim the H4 to get it to work. On top of that, the filaments in the H4 are located much closer to the base than in the H4H bulb. What this means is that your beam pattern will be off significantly.

2. If your one-piecers didn't come with harnesses, you can just use a harness from an H4 bulb that is easily obtainable at your local auto parts store. Although the bases are different, the plug configuration is the same between the two bulbs, so the H4 will work. It is not possible to use the stock 9006/5 harnesses with the one-piecers unless you do some major frankenstein work as some have done here already. You can modify a 9006 bulb and use your stock harnesses, but again, this involves modifying the base of the bulb to match the H4H so it is seated properly in the housing.

3. Depending on what clip is broken, it should not adversely affect the stability of the housing. I've found that the 2 bolts that attach at the top of the housing do the most to secure the housing in place. As long as these ones are intact and most of the other clips are not broken, you should be fine.

4. Now for the big question that you all have been asking...drum roll please! How does one wire the lights? There are several different ways to do this. The easiest way which I think a lot of people have done and to which drinkdontdrive alluded earlier is to wire your low beams to the H4H bulb and your highs to the H3 fog. The stock harness consists of 4 wires. You need to properly identify the positive and ground wires for each of the low and high beams and also find which wires coming from the H4H harness are for the low beam and the ground. Simply splice these wires into the proper ones on the stock harness. Do the same for the fogs but splice them into the high beams. What you end up with are regular working low beams, but when you flick on your high beams, your fogs will come on as well as your high beam light.

Now the correct way to wire the lights would be to run both the low and high beams to the H4H bulb and wire the H3 fog directly to the battery via a switch going into the passenger cabin. The problem with the stock setup is that the high beam wire is always hot unless it is properly grounded which runs through a relay. The H4H harness consists of 3 wires: low beam, high beam, and a single ground. If you try wiring the stock low and high beams directly, you'll end up with both beams lighting up at the same time. What you need to do is run them through a relay so that when you turn on your lows, the circuit for the high beams is cut and when you flick on your highs, it cuts power to the low beams. This way you'll have functional low and high beams as well as fogs if you choose to wire those.

Hope this helps everyone.
Mike Diaz is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 10-19-05, 09:34 PM   #2 (permalink)
 
Join Date: Oct 2005
Posts: 41


iTrader Score: 0 reviews
Yellow lights in the corner

Can Anyone Tell Me How To Get The Yellow Lights In The Corner Of The Headlight

Last edited by igloo; 10-21-05 at 07:30 AM.
igloo is offline   Reply With Quote
Old 05-01-06, 09:42 PM   #3 (permalink)
 
Join Date: Jun 2005
Posts: 208


iTrader Score: 0 reviews
Quote:
Originally Posted by igloo
Can Anyone Tell Me How To Get The Yellow Lights In The Corner Of The Headlight

yeah, the jdm 1 piecers should come with a capsule or bulb cover that is inside arleady. otherwise... somone took it out.
ss812 is offline   Reply With Quote
 
Old 08-17-09, 11:12 PM   #4 (permalink)
Registered User
 
OLDSKOOLACURA's Avatar
 
Join Date: Jan 2008
Location: P.A.
Posts: 222


Car 1: 93 ACURA LEGEND LS
Car 2: 2006 KAWI 636
Car 3: 2004 KAWI 636


iTrader Score: 0 reviews
i think i'm reading thing wrong, but will a 55w 10000 hid bulb fit into the jdm headlights. i'm kinda a newb with this whole hids and bulbs (never had to know it because i always have older cars) i'm going to be ordering hids and jdm headlights next week and i wanna know what i'm getting into....thanks
OLDSKOOLACURA is offline   Reply With Quote
Old 08-18-09, 04:04 AM   #5 (permalink)
Moderator
 
BIGBOY's Avatar
 
Join Date: Sep 2008
Location: Home of The Wire!
Posts: 7,284


Car 1: 94 acura legend ls


iTrader Score: 8 reviews
if your going to run hid's you also need projectors or you'll be blinding the hell out of oncoming traffic.
__________________
BIGBOY is offline   Reply With Quote
Old 08-19-09, 09:28 PM   #6 (permalink)
Registered User
 
OLDSKOOLACURA's Avatar
 
Join Date: Jan 2008
Location: P.A.
Posts: 222


Car 1: 93 ACURA LEGEND LS
Car 2: 2006 KAWI 636
Car 3: 2004 KAWI 636


iTrader Score: 0 reviews
screw on coming traffic, they always blinded me. now it's my turn

Last edited by OLDSKOOLACURA; 08-22-09 at 12:18 AM.
OLDSKOOLACURA is offline   Reply With Quote
Old 09-20-09, 12:53 AM   #7 (permalink)
Registered User
 
Zenica's Avatar
 
Join Date: Sep 2009
Location: NJ
Posts: 56


Car 1: 1991 Legend L sedan
Car 2: 1999 3.2 TL
Car 3: 2005 350Z


iTrader Score: 0 reviews
I was wondering, would using an after-market H4H HID kit eliminate any of the
wiring I would need to do?? Am I wrong in guessing that the HID kit will have
3 wires? One common, one low input and one high input that I can supply from
the OEM 3 wire harness.
Zenica is offline   Reply With Quote
Old 10-01-09, 10:38 PM   #8 (permalink)
Fut RIP
 
L3GDKANG/JDMKANG's Avatar
 
Join Date: Apr 2006
Location: 10-A-KEY
Posts: 10,147


Car 1: 91 Alpha/Alpha Touring KA7
Car 2: 92 Alpha/ AlphaT KA8
Car 3: 91L,93LS,94LS KA7's


iTrader Score: 39 reviews
Quote:
Originally Posted by Zenica View Post
I was wondering, would using an after-market H4H HID kit eliminate any of the
wiring I would need to do?? Am I wrong in guessing that the HID kit will have
3 wires? One common, one low input and one high input that I can supply from
the OEM 3 wire harness.
no it wouldnt because thw wiring set still has to be done to make the h4h bulbs work in the usdm cars.
__________________

Yes im back! Alpha/AlphaTouring!https://www.acura-legend.com/vbulleti...ang%2Fjdm-kang
Originally Posted by Blackend
Good to meet you too Willie. I tell ya, when we were walking the Auto-X course and you guys started pulling in, I had no idea who it was until I saw the green machine and we're all like "ooohhhh, that's Willie and the Acuraholicks!"

Glad you guys made it out, and nice meeting all of you.
L3GDKANG/JDMKANG is offline   Reply With Quote
Sponsored Links
Advertisement
 
Reply

  The Acura Legend & Acura RL Forum > Shop Talk > DIYs


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On


Powered by vBadvanced CMPS v3.2.2

All times are GMT -4. The time now is 02:01 AM.



Powered by vBulletin®. Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.0
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
© AutoGuide