A4 B5 DIY: Install headlight relays - Page 2 - AudiForums.com


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  #11  
Old 08-14-2014, 03:36 PM
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Quote:
Originally Posted by DHamilton View Post
My quastion is, the wires that you are pulling.. Ok, so Yellow black wires is coming of the ignition. So that means its going to PIN 30
I would not advise you to try and splice into the circuit near the ignition switch. Splice in AFTER the fuses where there are two separate circuits for the headlights, one for the driver side, and one for the passenger side.

Quote:
OK, Ground well just gets GROUNDED..

and the rest? wire color?

OK< Relay has FOUR wires to work with, One of which is Ground I understand.

Where is the rest of the wire going? to WHICH wires are we solder the remaining?
I would highly recommend for you to get a working understanding of relays before diving further into this. A relay just acts as a switch. It takes a low power signal input and opens or closes the relay which then sends power to the connected device. It's a switch activated by a switch that diverts the large power draw of the headlights away from the dinky headlight switch contact.

Cut the wires after the fuse box. The relay gets wired in between the fuse box and the headlights. The signal from the headlight switch merely activates the relays which are drawing their power from a different circuit (75x).

Quote:
It was one of my initial issues. is tracing the wires and seeing where the power is coming from and where is it going to.. So far .. NO wire labeling has be covered.
With all due respect, I have very clearly laid out the entire headlight circuit form start to finish with pin numbers, fuse designations, and wire colors, I'm not going to retype all of that.

Quote:
ALSO: You are sourcing your power from a 5AMP power sources, but even the OEM headlight set up needs a good 15amp to run em. My have HID set up on em. I need a 30AMP to ignite them then they drop down way low.
SO< how is that going to help me with a 5 AMP power source to the relay?
Well, the OEM fuses are 10 amps. I went with 5 amps simply because they did not blow. Generally, you want the smallest fuse possible for a given load to minimize risk. Since the OEM fuses are 10 amps, I will try switching out my 5 amp fuses for 10s, though I don't expect to see any difference in light output.

I do not use HIDs and cannot advise you on their fuses or power requirements.
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  #12  
Old 08-16-2014, 12:57 AM
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Default Headlight Switch - headache continues

Before I begin. Did my picture populated? I did not notice being there now.

Moving on, Yes, I understand relays..plenty of diagrams on google to permanently etch into my head.

See, I guess I still did not found what I was looking for and that is..

WHAT is the wire that is going from the switch to the headlight?

I do not know,

What I DO know is that there is a medium guage wire that is coming from the ignition TO my switch, BTW that is how long it is, and If you looked at the pictures.. It looks its burned to ****.

I'm on my third (3) switch.. U should see my frustration.. lol

Second thing I do NOT know is, what exactly is the function of that Yellow wire with black stripe coming from the ignition switch to my light switch.

Those TWO things I do not know..

Understanding relays is not an issue..

Its the wirring, which wirring should we be dealing with, Is it the yellow and black stripe or are there more? since these audi switches, power can be going in with one wire and arriving to the headlight with ANOTHER wire type/color..

this is my primary concern.. the wirring colors and pathway.

thnks

as you can see from my uploaded pictures, I have something that eating my switches and it got to the point it burned the plastic conector, I had solder in a new one..

I have attached/uploaded 3 images for everyone to see hoping someone knows whats going on, and what im talking about..
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A4 B5 DIY: Install headlight relays-wp_20140810_17_28_46_pro__highres.jpg   A4 B5 DIY: Install headlight relays-wp_20140810_17_30_36_pro__highres.jpg   A4 B5 DIY: Install headlight relays-wp_20140810_17_29_42_pro__highres.jpg  
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  #13  
Old 08-16-2014, 01:00 AM
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Default Headlight switch

this is the wire from the ignition switch.. that is burning ma sheet
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A4 B5 DIY: Install headlight relays-wp_20140810_17_58_53_pro__highres.jpg  
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  #14  
Old 08-21-2014, 06:58 AM
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The damage you have is beyond the normal failure of the headlight switch contact. Something is causing a short bad enough to completely melt the plastic off that pin. Check all the wires for broken insulation. At a minimum, you should replace that plug, you might get away with keeping the switch assembly, but it could very well be fried too. No way for me to diagnose that with pictures unfortunately.
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  #15  
Old 08-21-2014, 09:31 AM
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I like your soldier jig.
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  #16  
Old 02-12-2017, 09:57 AM
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Blast from the past, waking up a dead thread.

So... any reason why you didn't also add relays for the high beams? There's 4 fuses for headlights in my fuse box, 2 for the low beams and 2 for the high beams.

Also, I was concerned that the low draw from the relays might trigger the headlight warning in the info center. Is that not the case?

Just wanted to get my ducks in a row before I start rewiring stuff.
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  #17  
Old 03-28-2017, 06:56 PM
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To follow up on my previous post: I ended up adding 4 relays, 2 for the low beams and 2 for the high beams. There's more than enough free relay slots under the dash. I have a 2005 Passat that I've been grabbing parts from, and it had all the relays and relay sockets I needed, with all the wiring that goes along with it. I also added a relay for DRLs (turns on my LED DRLs while the engine is running, turns them off when headlights or parking brake is on), and a relay for retained accessory power (provides power after I turn the car off until I open the doors), and a relay that temporarily kills my amps while cranking the engine without turning off my head unit. So that's 7 new relays, all in OEM spots
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  #18  
Old 04-10-2017, 09:04 AM
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Hello, my husband bought 2016 Audi Q7, I want to connect android via smartphone, so my friend uses. Tell me how to do this, please?
Who has read the forum before, knows my misfortune. I tried on how to connect the phone to the onboard computer, but now I've gone through a lot of sites, spent a lot of time searching for where the headlight can be for my car can be. Finally I found it, that's it - https://www.uzooka.com/audi-headlights. Now I have time to fix it.

Last edited by Mary S; 04-10-2017 at 12:39 PM.
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2000, 23, a4, a6, audi, block, clip, fuse, fuses, headlight, power, relay, steering, switch, wheel

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