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Old 10-11-2006, 02:52 PM   #1
IllNastyImpreza
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Default best way to make headlights brighter? relay etc etc

OK so I want brighter headlights...but I DON'T want the "flashyness" of having HIDs. (they scream to every cop that sees me that I can afford any ticket he gives me )

what are the best headlights/wiring styem to get the most of out of my halogen system ??

I have heard about Daniel Stern's relay kits. Are these any good? what else is out there for our cars? what exactly should I get to get the most out of my headlights?
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Old 10-11-2006, 07:32 PM   #2
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You can build your own relay harness and yes, it does improve the lighting, but perhaps the most dramatic difference will come from making sure your headlight lenses are spotless clean and clear. Aged lenses eat up a TON of the output.
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Old 10-11-2006, 08:49 PM   #3
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cool, good to know. I used to be pretty good with relays and such. I will see if I can pick up some SPDT ones and have some fun :0)

I heard the ground on the stock headlights is the worst

can anyone recomend a good bulb to use??
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Old 10-11-2006, 08:54 PM   #4
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Yep the problem with the Subaru lighting system is on the ground side due to the switched ground setup. You can take voltage measurements from the battery terminals to the bulb socket (must be done with the bulb connected and operating) to see the actual drop on the positive and negative sides. You should see a small drop on the positive and a much larger drop on the negative. Adding a relay for the positive won't do much, but on the negative it should make a noticeable difference.
For bulbs please refer to the sticky bulb thread up top.
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Old 10-11-2006, 09:03 PM   #5
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Quote:
Originally Posted by Mulder View Post
Adding a relay for the positive won't do much
By "relay harness" i believe the idea is to relegate the stock wiring to merely serving as an activation lead to a relay coil and then 30 & 87 of the relay are done up with high current capable wiring direct from the battery. This will definitely represent a massive improvement in output.
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Old 10-11-2006, 09:09 PM   #6
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Quote:
Originally Posted by nhluhr View Post
By "relay harness" i believe the idea is to relegate the stock wiring to merely serving as an activation lead to a relay coil and then 30 & 87 of the relay are done up with high current capable wiring direct from the battery. This will definitely represent a massive improvement in output.
There will only be a noticeable improvement if there was a significant voltage drop to begin with. Since the majority of the drop in the Subaru lighting circuit happens on the ground side, that is where the relay should go for the most effect. Adding a relay on the positive side where the drop is much less will not show the same results. And actually there is already a relay for the common positive for each side.
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Old 10-11-2006, 09:13 PM   #7
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Forgive me for being obtuse, but why would you go through the trouble of placing a relay on "just the ground" side when the wiring is incredibly simple to just redo the whole thing?

edit- the additional advantage of a full harness to completely redo the high and low circuits (which is accomplished with two 40amp dual-87 relays) is that you don't have to cut anything in your car.... it's totally plug-and-play.

Last edited by nhluhr; 10-11-2006 at 09:21 PM.
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Old 10-11-2006, 09:25 PM   #8
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When I measured the voltage drop a while back after installing my Morettes, I found about .5V on the positive and 1.5-2V on the negative. I don't think .5V is worth bothering with. I've been running my HIDs on the factory positive circuit, with direct grounding, for over four years now.
If you prefer a plug-in solution and the full harness takes care of the ground side, by all means go for it.
You can do a test to see how much improvement the relay bypass will provide. Take a heavy cliplead or jumper wire, and connect it in turn between the battery positive and positive bulb contact, and battery negative and bulb negative. You'll see how much the bulb brightens, that's what the relay will do for you.
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Old 10-11-2006, 11:49 PM   #9
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.5v is STILL an improvment though! sounds worth it to me....Since I'm already in there
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Old 10-13-2006, 04:04 PM   #10
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Default Harness

Quote:
Originally Posted by nhluhr View Post
edit- the additional advantage of a full harness to completely redo the high and low circuits (which is accomplished with two 40amp dual-87 relays) is that you don't have to cut anything in your car.... it's totally plug-and-play.
After reading this thread I'm interested in replacing the harness to get more output. Would you be able to tell me where I might be able to get a full harness and possible instructions.
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Old 10-13-2006, 04:14 PM   #11
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Well you could buy it from suvlights.com or just as easily build one with parts you buy from danielsternlighting.com or from rallylights.com

The diagram would look roughly like this:

If your stock lowbeams turn off when you flip to high, this diagram will work for you and also keep them on when you go to highs. This may or may not be desirable.

If your stock lowbeams already stay on, or if they don't but you don't want them to, then just delete the diode jumper from the diagram.
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Old 10-13-2006, 04:16 PM   #12
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i got one, plug & play .. very easy.

try ebay .. 9007 harness
or
http://eautoworks.com/html/ORD-1-1-1-28033.cfm
or
http://www.suvlights.com/product_inf...16313d6b9976a0
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Old 10-13-2006, 04:44 PM   #13
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You do NOT want to have both high and low beams on simultaneously with 9007s or any other dual-filament bulb. They are not designed for this and will burn out quickly.
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Old 10-13-2006, 05:33 PM   #14
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.. the candle that burns twice as bright ..
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Old 08-07-2008, 12:48 PM   #15
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Quote:
Originally Posted by Mulder View Post
You do NOT want to have both high and low beams on simultaneously with 9007s or any other dual-filament bulb. They are not designed for this and will burn out quickly.
Hey your comment reminds me that if I play with the light switch, I can put it in a kind of "in the middle" position where both low and highs are on at the same time, giving a nice lighting... I figured that it was probably not the best thing to do, but it seems like I can't seems to be able to restrain myself of doin it lol I might have to try harder

I noticed my gf's 2006 2.5i cannot do it, now I understand why.

Is there any 9007 bulb designed for simultaneous filaments operation ?
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Old 08-07-2008, 05:01 PM   #16
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having HID don't scream "cop, come get me"

I haven't had any since I brought my STi.





T
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Old 08-07-2008, 05:19 PM   #17
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Quote:
Originally Posted by crasyboy412 View Post
having HID don't scream "cop, come get me"

I haven't had any since I brought my STi.





T
I guess proper HID is no problem, unless you have the cheaper HID-in-stock-headlamp mod (I think there is a known glare problem when installing HID into a stock bugeye headlight not designed for HID)
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Old 08-07-2008, 05:29 PM   #18
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Quote:
Originally Posted by IllNastyImpreza View Post
OK so I want brighter headlights...but I DON'T want the "flashyness" of having HIDs. (they scream to every cop that sees me that I can afford any ticket he gives me )
Wait, did I miss the memo that said HID headlights automatically mean I have attained "baller" status and can afford large, unnecessary tickets from the police?
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Old 08-10-2008, 03:06 AM   #19
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Is there a DIY anywhere for this?

Quote:
Originally Posted by nhluhr View Post
You can build your own relay harness and yes, it does improve the lighting, but perhaps the most dramatic difference will come from making sure your headlight lenses are spotless clean and clear. Aged lenses eat up a TON of the output.
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Old 08-10-2008, 03:22 AM   #20
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get a can of Plexus Plastic Cleaner and a microfiber rag and clean them thoroughly. Then, keep them clean.
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Old 08-10-2008, 03:29 PM   #21
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No I mean the relay harness!
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Old 08-10-2008, 07:23 PM   #22
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the best thing is to contact danielsternlighting.com and just have him sell you the parts you need but the basic idea is you utilize the stock 9007 plug from the car to activate a relay which then feeds 12v power from the batt/alt directly to your headlights via heavy guage wiring... right into the sockets on the headlight.

You'll need a couple heavy duty dual-87 40amp relays, a pair of 9007 sockets, a pair of 9007 plugs, the terminal connectors for the relay, and some heavy gauge wire. I recommend the heavy black landscape lighting wire they sell for 12v underground wiring at home depot. It's 12gauge and has a heavy black rubber insulation. It would also be a good idea to solder all connections instead of just crimping and also seal them with SEALING type heatshrink, not just regular heatshrink. Then wrap the whole harness with a durable wire loom to protect it from abrasion. Use zipties to secure it in place.
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Old 08-10-2008, 08:55 PM   #23
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Would it cost less to DIY?


Dual 87 relay, like this? (Dual SPST)
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Old 08-11-2008, 10:53 AM   #24
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i made my own and it was very cheap to make...less than $20 in total material. but i also have electric tools at my disposal already. the 20 also included 3 bosch relays.

you don't necessarily need the relay posted, you can also use 2 separate ones. you may also want to go with harness plugs for the relay for a cleaner install but it's not necessary.

i think getting the parts from daniel sterling would still be less than what places like SUV lights charge for these things.

IMO, get really good material so you don't have to worry about replacing in a few years.
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Old 08-11-2008, 11:09 AM   #25
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Quote:
Originally Posted by BeBop86 View Post
Would it cost less to DIY?


Dual 87 relay, like this? (Dual SPST)
You don't really have a choice. It IS DIY. but you still have to buy the parts and DanielSternLighting.com is the best place to do that.

And no, a Dual-87 means exactly that. It has two "87" terminals.
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