Jump to content
Sign in to follow this  
Tungsten

Building a Headlight Relay Harness

Recommended Posts

So the adapter you made uses the pass side stock plug to feed to the relays to "trigger" the new relays which than sends power out to the new plugs right?

Correct.

Share this post


Link to post
Share on other sites

IIRC the camera was sitting on the same stack of tires for both shots, in an attempt to get around this. Then again, my camera does weird things trying to compensate for low light levels. :shrug:

For a good comparison shot plug one light into the factory harness and one into the relay harness.

James

Share this post


Link to post
Share on other sites

Quite amazing how much the difference is...

 

(In reference to JamesRich's post above.)

Share this post


Link to post
Share on other sites

I would use the passenger side plug, personally. As it's the first contact made inside the switch. I can simulate a burnt out headlight by turning my headlight switch only halfway from markers->headlights. I think it's funny. Same thing with high beams, if I pull back just slightly on the stalk, only one high beam comes on.

Share this post


Link to post
Share on other sites

IIRC the camera was sitting on the same stack of tires for both shots, in an attempt to get around this. Then again, my camera does weird things trying to compensate for low light levels. :shrug:

 

Just to show you what moving the camera ever so slightly can do to simulate a brighter light, it may look like the camera is at the same level, but it's not. I'm not trying to call you out or anything, just saying the light against a wall is a much better way to show a comparison. This is my truck with 55w low beams in H4 E-spec housings.

 

IMG_20120227_175346.jpg

 

IMG_20120227_175351.jpg

 

 

I would use the passenger side plug, personally. As it's the first contact made inside the switch. I can simulate a burnt out headlight by turning my headlight switch only halfway from markers->headlights. I think it's funny. Same thing with high beams, if I pull back just slightly on the stalk, only one high beam comes on.

 

Just to expand on this. Halfway between markers and headlights on my switch, I can turn on my driver side headlight, and the passenger side is out. I was wrong in the post I'm quoting. and pulling halfway back to turn the brights on, the passenger bright comes on, and the driver side low stays lit.

Share this post


Link to post
Share on other sites

You can also use a fuse block, if you are going to be wiring in more accessories for a cleaner look. I picked on up that holds 6 fuses which should be more than enough for me for 15 dollars. I just don't like those fuse holders hanging off the battery, at least looks wise.

 

Yep, I am running one of those power distro blocks, manu'd a mount that makes it look somewhat clean... http://www.torymoore.com/pathfinder/spaghetti.html

 

313298_10150273558354075_612879074_7705219_6843489_n.jpg

 

All done!

Dude, that is AWESOME. You really done a fantastic job on this one... I am impressed...makes me want to tear mine out and RE DO IT!!!!

 

WAVEY Looks like a very clean install, too.

 

X2!!

Share this post


Link to post
Share on other sites

Just to show you what moving the camera ever so slightly can do to simulate a brighter light, it may look like the camera is at the same level, but it's not. I'm not trying to call you out or anything, just saying the light against a wall is a much better way to show a comparison. This is my truck with 55w low beams in H4 E-spec housings.

 

 

Just to expand on this. Halfway between markers and headlights on my switch, I can turn on my driver side headlight, and the passenger side is out. I was wrong in the post I'm quoting. and pulling halfway back to turn the brights on, the passenger bright comes on, and the driver side low stays lit.

 

Hey, I appreciate the criticism. I pretty well botched the stock wiring harness (nobody around here knew what a female 9004 was), or I'd try new pics with a wall. I added a disclaimer to my original post.

 

And yeah, just depends on the bend of each contact in the switch. Each filament has its own contact (except for the markers/tail lights).

 

P1010001-12.jpg

 

Also, I've had no trouble with my lights since I did this mod. :aok:

Share this post


Link to post
Share on other sites

Looks like my headlight wiring was alright. I notice absolutely ZERO difference. But, still did the mod since I now have 100w high beams. That'll fry the stock wiring for sure. here are comparison pics. DS is not relayed in the first two pics, and in the final pic, both are running on relayed power.

 

IMG_20120308_181914.jpg

 

IMG_20120308_182115.jpg

 

IMG_20120308_182252.jpg

Share this post


Link to post
Share on other sites

Yeah I think this is one of my next mods... My 93 xe headlights are the big SUCK. lol

Share this post


Link to post
Share on other sites

The most important thing that makes this mod worth doing is that your high beams will not lag ever again. I remember how I had to wait for the right one to engage. After doing this all the problems are gone.

Share this post


Link to post
Share on other sites

Has anyone tried this with the H4 set up? Could we use the same harness just with the H4 connectors?

Share this post


Link to post
Share on other sites

Sure. It will be even better with H4 bulbs. Just use a different plug on the end. I just wanted to keep the factory headlight style. You will have to swap to the hardbody grille for H4 lights.

Share this post


Link to post
Share on other sites

Beautiful, thanks mate. Cheers for the write up to, did a great job!

Share this post


Link to post
Share on other sites

Photos from the first page are missing. Could someone post new photos?

Share this post


Link to post
Share on other sites

it's not much but this is what mine looks like. I used 3-conductor, 12ga underground feeder wire from lowe's. Insulation is nice and thick and the install comes out really clean.

http://i132.photobucket.com/albums/q6/iTHINKiHAVE_add/NPORA/99C2DBDC-D4C3-47B3-96D6-86F163E2B331-1510-0000003E2A793BED_zps856dfe5b.jpg

Share this post


Link to post
Share on other sites

Thanks! Did a bunch of searching around and pondering since i have limited tools, space (college apartment), but mostly it's freakin' cold and the less time fussing around under the hood the better at the moment lol

 

Quick tip: You can see I put male-female connectors on the pigtails of the socket...

This way it's much easier to swap out the sockets (could only find crappy plastic ones), switch to IPF's or E-code housings ;)

Also added a dab of dielectric grease to keep the connections healthy and put a little piece of gorilla tape over each to insulate

Share this post


Link to post
Share on other sites

If anyone could re-host/re-post the wiring diagram pictures, I'd greatly appreciate it!

I spent hours working on mine, starting with the passenger side - but I never got it to work right, so I had to put the factory 9004 male end back on to the wires and go back to stock. :(


I had a multimeter, but it's strange...depending on whether I was on high or low beam, all 3 wires on the factory harness had positive voltage at some point - so I was never sure which one was the ground wire. :( :( :(

Share this post


Link to post
Share on other sites

That's odd... suggests a bad ground, maybe? Was it full 12v positive? IIRC the wires you want are red with differently colored stripes. I didn't use the factory grounds, just ran them all (lights and relays) straight to a bolt on the firewall.

Share this post


Link to post
Share on other sites

Damn it... All the pictures disappeared.

 

Here is the wiring diagram:

 

303768_10150275886604075_2479839_n.jpgH

 

Share this post


Link to post
Share on other sites

Rise, zombie, rise!

 

Not on a Pathy but this video shows a pretty good gain relaying the headlights on a Jeep, with before and after measurements using a proper lux meter.

Share this post


Link to post
Share on other sites

Nice. I need to do this on my "new" 95. Forgot how ****** the lights were lol.

  • Like 1

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this  

Welcome to NPORA Forums

 

Please REGISTER to gain full access to the forum.

Make sure you read the Forum Guidelines and don't forget to post a new intro in the New People Start Here! section, to say hi too everyone.

 

-NPORA

×