low/high sametime w/o britebox

[hunterdan]

86 is the trigger wire. I used 2 relays, but I think you could use one if you just spliced the 2 wires together for the low beams.

Dan

 

[storlied]

So I can use this same setup as an alternative for the heavy duty wire harness to get the full voltage to the headlights?

Is there anyway to combine these two probjects into one?..
This is the way I see it:
Stock headlight switch, triggers a relay to turn on the low... omg ya know what... I'm going to have to use two relays per head light, aren't I? Or maybe two relays for each... oh I don't know.. how would I set this up..

 

[storlied]

What about this,

 

[hunterdan]

If you want to upgrade the harness, your best bet would be to buy one, then do the diode mod as I am almost positive it will work in that situation. Your diagram has no numbers on the terminals so its kind of hard to follow. If your just wanting the low beams to stay on with the highs, you **could** get away with just one relay. The wire heading to the low beam would just have to be split to send power to both sides. If you do this, you will save about $6, the cost of one relay. Now that I think about it, that probably would have been a cleaner install, but oh well, what I have works and works well. To top it off, I believe the HIDs are actually a bit bright when the highs are on as they are getting the full voltage from the alternator. I highly recommend you just buy the upgraded harness as it would be much easier for you, and is really not that expensive, considering you'd have to buy the plugs for the bulbs, as well as the female connector to plug the stock harness into.

Dan

 

[storlied]

The picture would be as if I used the same relays in that KC guide, this setup I drew on mspaint would be to get the full voltage to the lights And low/high same time on high.... Without spending much...
top 87, left 86, ground is 85 (right) and 30 for the positive power (bottom)

 

[storlied]

It would work, right?

Is there any place I could buy a wire harness extension so I could cut it in half.. making wiring all this up easier and less of a mess with the stock parts..

 

[hunterdan]

you can buy higher wattage plug ends from most auto parts stores, but you will still need the female end. I still recommend you buy an upgraded harness, which can be purchased from summitracing.com for about $40, add the diode and call it good.

Dan

 

[storlied]

That ruins the fun of making something truly custom. =P And cheap. I figured all I need is two small extensions if they make them that goes from the harness and to the light (with the connectors on both ends, so I can just cut it in half and wire it up to my weird relay system which I'm 99.9% sure will work perfectly.), two relays and some wires.. Super cheap, full voltage plus the high/low mod. And I could make a write-up. =D

Gives me a chance to mess around with wiring and relays a bit so I can learn more about this stuff, just buying a harness and plugging everything right up seems like no fun..

 

[kert0307]

(Although I think I gonna try the diode mod)

I wouldn't try using a diode, here's why...

What you are doing with the diode is using the high beam circuit to power both highs and lows, since it is only designed for highs, when you add the lows to it the current will dramatically increase, probably to above what it is designed for, which is why the person who tried it blew out a fuse...

Use a relay, that way the low beams get their own circuit and aren't using the high beam one.

 

[storlied]

Like my design?

 

[oplitic]

Here's a kinda detailed diagram. You diode isolate the low beam wire to prevent back feeding voltage. Make sure the band is facing towards the headlights, it allows voltage to go to the headlight, but not back into the switch/relay, whatever is back there. Made it kinda big so everything wasn't squished together.

 

[storlied]

I still think relays would be much safer.

 

[hunterdan]

Here's a kinda detailed diagram. You diode isolate the low beam wire to prevent back feeding voltage. Make sure the band is facing towards the headlights, it allows voltage to go to the headlight, but not back into the switch/relay, whatever is back there. Made it kinda big so everything wasn't squished together.

Thats a really good illustration, but where does the diode connect to on the car? I think this solution would be much easier to do, and cleaner.

Dan

 

[storlied]

Quick question, does anyone know how the wiring harness is setup? Like, do I have to do this to both headlights, or can I mess with one side and it affects the other?

 

[kert0307]

Here's a kinda detailed diagram. You diode isolate the low beam wire to prevent back feeding voltage. Make sure the band is facing towards the headlights, it allows voltage to go to the headlight, but not back into the switch/relay, whatever is back there. Made it kinda big so everything wasn't squished together.

That looks like it will work, I was thinking that they were talking about inserting a diode in parallel off of the high beam wire and onto the low beam, so when the highs were switched on, they would power both lights from the one wire, which wouldn't be a good idea.

Using both a relay and a diode like you have done is the best way, however the diode is probably not needed(but is a good idea to be safe).

 

[oplitic]

That looks like it will work, I was thinking that they were talking about inserting a diode in parallel off of the high beam wire and onto the low beam, so when the highs were switched on, they would power both lights from the one wire, which wouldn't be a good idea.

Using both a relay and a diode like you have done is the best way, however the diode is probably not needed(but is a good idea to be safe).

I would throw it in to be safe. I don;t like to have back feediing voltage ( even though I'm sure it'll be ok). It's cheap enough anyways. Jumping the wire would work. But as someone saw, it blows the fuse drawing too much current. In order to do that you'd have to beef up the wires. And that's more work than just doing this obviously. lol

 

[oplitic]

Quick question, does anyone know how the wiring harness is setup? Like, do I have to do this to both headlights, or can I mess with one side and it affects the other?

You'll have to do this on both sides. They're on seperate fuses/wires.

 

[oplitic]

I still think relays would be much safer.

it says relay right on it... :scratch:

 

[oplitic]

Thats a really good illustration, but where does the diode connect to on the car? I think this solution would be much easier to do, and cleaner.

Dan

You cut the low beam wire and place it in, and on the headlight side of the diode splice in your wire to the relay.

Cheap, quick little diagram, with a sad-looking headlight, lol. It's the low beam wire.

 

[oplitic]

Oh, btw. I had thought of another way to do this. Instead of the relays and cutting, etc. I want to figure which wires are the hi and low beam wires ( in the wires that come down from the steering wheel) and diode them paralell (like originally tried behind the headlights). They are small wires that trip a relay under the dash. So I was going to fuse them with a small (like 2 amp) fuse and try it so I don't fry wires or blow the car's fuses. Less work down the road for toher people or if I get another mounty/x.