Bought my wife some projector headlight with some halo's. I plan on tapping into the running lights to power the halo's. Question is I want to make them blink with the turn signals. What kind of relay could I use to make this work. A wire diagram would be great. Any help?

 

Do you want both rings to blink or just one? Do you want them to stay on with the positioning lights? Are the rings individually powered or one wire turns on both rings? (Just one red and black wire or two red two black wires)
The issue is that the rings are a single filament ( for the lack of a better word) since you can't install another filament like a normal turn signal bulb you need to actually wire in a few different relays (from turn signal to positioning light circuit) to control the way you light up the rings from which source. You're directing two power sources to one bulb. It requires you turning one source on or off and interrupting the other power source do you dont back feed power. You will need two single pull double throw relay. Or four single pull single throw relay.
Its doable.

 

I watched this and was thinking a diode might work.
What we want in the end result is for both halo's around each light to blink with blinkers regardless if running lights are on or not and come on when the running lights are on.

 

Ok a relay has a coil that energizes. So the typical Positive and negative. In that relay there is a switch that moves between two points typically referred to as open and closed terminals, these terms refer to the relay at rest. When you send power to the coil the switch turns and the coil changes state and the points switch where what was closed so now open and vice versa,

You wire the relay (look at the schematic I posted.

Wire the headlight rings as the instructions state ground them and Ttap to parking light wire. Your parking lights will now turn on your ring lights as advertised
Ok cut that red wire you just connected.
One side of that red wire to 30. The other side to 87A. You basically just wired your on off switch to the ring
(The 87 post is not being used because you're not sending power anywhere. You're interrupting a different power source so 87 doesn't apply. You're not giving power you're taking it away

on the coil side to power the relay
85. power from turn signal + wire
86. Ground wire

What this accomplishes is that it turns your relay into a inline switch. When you apply the turn signal the relay coil will energize and actuate the switch inside the relay. At this point the constant power from your parking lights that is interrupted whenever the turn signal comes on and will make the ring turn on and off in sequence with your factory turn signal.
You will need to do this on both headlights. You will need two relays with the same terminals as the pic I linked.

 

Ok just saw you want the lights to come on with or without parking lights also. I'll have to draw something out for you. It requires different schematic

 

Wife made a change. She only wants the outside half of the halo to blink.

 

That's easy, but does the head light have each ring with its own positive and negative wire? Or at least the positive wire separate for each ring? They can share a negative so that's not as important.
If it doesn't then you need to rewire one ring with its own positive wire feed. Not sure if that's possible without disassembly of the light housing

 

Each headlight has two half circle halo's. Both have a separate positive and negative wire. I am thinking two relays and a diode will be needed. A diagram would be great. Thanks

 

You won't need relays. You won't need a diode because wiring it this way you're not back feeding power anywhere. A diode is basically a one way check valve for electricity. Choose which ring/light you want to come on with parking lights and which ring you want to blink. Wire one ring positive wire to your parking light positive wire. Wire the other ring positive wire to the turn signal positive wire. Take both grounds and wire them to the ground wire on the parking/turn signal wiring or use a eyelet crimp connector and screw it to a ground on the frame or body sheet metal. Get a good ground otherwise the lights won't work or they will flicker if the ground or connections are loose. Make sure your connections are tight. I like soldering wires in this situation. If you're gonna crimp I solder the crimp.
All you're doing is adding one bulb to the turn signal circuit and one bulb to the parking light circuit. The rings most likely don't draw anything past .25 of a amp so you're not drawing enough to blow anything or warrant the need for relays.

If you want to use relays I can draw something up. I may not be able to do it today but I'll do it

 

But the above will not light the full circle when the parking lights are on.

In the old days there was a easy way to do this. Way back when they had the marker lights in the fender, and the turn/markers in the grille, some people want the fender markers to work normally, but also want them to blink with the appropriate side signal blinker also. What they would do is take the ground off the fender marker light, and hook it to the + wire of the grille turn light.

With the running lights on, power would go through the fender light, and then through the turn light bulb, and then to ground. It would still work good enough that way. Then when that turn signal light was activated, 12v would come down from the turnsignal switch and blink the grille turn bulb as normal. But what this would also do is put 12v on the ground side of the fender bulb. 12v on both sides of the bulb would turn it off, so it would blink opposite of the grille bulb, but it would blink.

You could try this above method with the LED halo lights and see if it would work. Ground the inner halo light normally and hook it to the running lights. Take the outer halo and hook it also to the running light wire, but instead of grounding the outer halo light, take the ground wire and hook it to the turn light wire.

 

I guess I'm not understanding what op wants. I assumed the lights have dual rings and he wanted one ring lit with parking lights one lit with turn signals.

If he wants both rings on the headlight to stay lit with parking lights and one to blink while the other stays constant on you need a relay.

LEDs are not like regular bulbs and I don't believe your mod idea will work as LEDs have polarity. Bulbs are different and the filament is basically a connection to back feed power in your mod because incandescent bulbs aren't really polarity sensitive like LEDs.

He could wire it to a sequential flasher so the turn signal light travels. As long as he gets three bulbs in a row he could make the turn signal go blink blink blink and travel. Sort of like the new mustang rear tail lights go but on the front turn signals not rear tail lights.

Can you post a link to the lights so I can see what you're seeing? And
What lights do you want lit with parking lights
What lights you want to blink
What light do you want to keep constant lit when one is blinking.

I would need to know when power is applied how the ring/s is/are lit. I'm not sure what 1/2 lit means. Does the wiring light up only 1/2 the ring while the other set of wires light up the other half the ring? Or when you say 1/2 do you mean just one ring of the two.

 

Double post

 

Let me try to clarify.
1. Want outside half to blink with blinkers.
2.. Full circle to come on with parking lights.
3. When full circle is on with parking lights and blinker is blinking outside half blinks until the blinker is off and the goes back full circle lit.

7" Halogen Projector Purple Pink LED Halo Angel Eye Headlight H4 Light Bulbs 12V | eBay

Here is the lights.

 

I saw the link. I see what I'm looking at. Easy. I'll draw up a schematic with a relay. I'm getting ready to go to dinner at my aunts but I'll get to it.

 

You are correct, my idea would not work if the parking lights are not on. It would work I believe in all other modes. With the parking lights off, if you still wanted the halo's to blink, power would have to go backwards from the signal circuit, through the halo's, and then backwards up the parking circuit to ground. It could not do that with a LED.

I see people running around with these halo lights on all the time. If he ran his parking lights all the time to activate the halos all the time, the simpler idea would work.