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Post by mjason86 on May 15, 2019 19:23:35 GMT
Hi, so, I've been looking for solutions to this problem for days now.
I have a US, MK7 GTI, 2015. Non LP. But with Fogs and Auto light on feature. With Halogens, of course.
I bought new HELIX reps, it has cornering light provision (with bulbs) that I want to use, but I have not a clue how.
I've read from lots of threads that fogs can be used as a cornering light. Now, I'm wondering IF it's safe to tap on the Fogs Power for the Helix Cornering Light so that when the Fogs activate, it'll send power to the helix cornering as well? If it works that way? Has anyone tried this?
This is nothing but a theory that I have literally thought of just now. Fairly new with vehicle electronics, let alone coding.
Any help is greatly appreciated!
PS: I have yet to install the new Helix reps.
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Post by ofektal8 on May 15, 2019 20:22:32 GMT
Hi, so, I've been looking for solutions to this problem for days now. I have a US, MK7 GTI, 2015. Non LP. But with Fogs and Auto light on feature. With Halogens, of course. I bought new HELIX reps, it has cornering light provision (with bulbs) that I want to use, but I have not a clue how. I've read from lots of threads that fogs can be used as a cornering light. Now, I'm wondering IF it's safe to tap on the Fogs Power for the Helix Cornering Light so that when the Fogs activate, it'll send power to the helix cornering as well? If it works that way? Has anyone tried this? This is nothing but a theory that I have literally thought of just now. Fairly new with vehicle electronics, let alone coding. Any help is greatly appreciated! PS: I have yet to install the new Helix reps. In my replicas the Cornering light inside the headlight turns on only when high beams are on and you use the turn signals.
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Post by mjason86 on May 15, 2019 20:39:36 GMT
I see. I forgot to mention that my Helix reps has provision BUT is not connected to anything, no harness whatsoever.
Sadly, even if I install my reps, it won't function the way yours does. Since it has no power source..
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Post by dv52 (Australia) on May 15, 2019 23:30:55 GMT
jason: Hi- I suspect that enabling the "headlight" cornering light function (which entails setting a software switch in the code-string of the module @ address hex09) will be problematic because the factory fittings with this facility also run Xenon bulbs. I also suspect that running supply power to the cornering lights on your Helix reps from the fog-lights will likewise be problematic because the additional power will likely trigger the lamp monitoring function in the Leuchte-sets. But why don't you use an interposing relay? By this I mean, wire your Helix cornering lights to a relay that is powered directly from +12 volts (via a suitable fuse-of course) and then trigger the relay to operate from the fog-lights. To enable the cornering lights on your front fogs do this: - Leuchte12NL LB45-Lichtfunktion B 12 > Abbiegelicht links
- Leuchte13NL RB5-Lichtfunktion B 13 > Abbiegelicht rechts
Of course, I assume in making this suggestion that all that's needed to make your Helix cornering lights work is a simple +12 volt supply. And, be aware that with this wiring arrangement, both your fogs and the helix cornering lights will operate together for both the front fog and cornering light functions- but if you are comfortable with this, it's a relatively easy solution If you want anything more sophisticated (like the selective operation of the Helix cornering lights under certain condition), you will need to design and build a logic circuit to operate the relay coil - this ain't difficult, but it does require some expertise and experimentation. Don
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Post by mjason86 on May 16, 2019 0:26:27 GMT
Hi Don, Thanks for taking the time to reply!
And yeah, I figured there may be some overloading that can happen with the setup I have thought of. But thank you for the relay suggestion! I totally fail to think about that.
And yep, it really won't bother me if the cornering light will be ON with the fog lights. If it will in the future...at least it'll be a relay setup not splicing directly on the fogs' wiring. Lol
Thank you very much for your help! Have a good day.
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Post by mjason86 on May 16, 2019 4:31:25 GMT
Just to clarify Don, will it be better to just wire it up with a new Fuse? or can I just tap on the existing Exterior (Left,Right) Light Fuses? Those fuses are rated at 40A as per www.autogenius.info/volkswagen-golf-mk7-2012-2018-fuse-box-diagram/. But I will still double check, of course. So.... something like this maybe? One relay per fuse; (Tap) i.e. LEFT 40A ~ "30" (+12V) GRND ~ "86" Fog + ~ "85" Helix + ~ "87" Please do correct me if I am wrong. Thank you very much!
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Post by dv52 (Australia) on May 16, 2019 23:17:33 GMT
Just to clarify Don, will it be better to just wire it up with a new Fuse? or can I just tap on the existing Exterior (Left,Right) Light Fuses? Those fuses are rated at 40A as per www.autogenius.info/volkswagen-golf-mk7-2012-2018-fuse-box-diagram/. But I will still double check, of course. So.... something like this maybe? One relay per fuse; (Tap) i.e. LEFT 40A ~ "30" (+12V) GRND ~ "86" Fog + ~ "85" Helix + ~ "87" Please do correct me if I am wrong. Thank you very much! jason: Yes, your suggested pin numbering is OK. As to your question regarding where to tap power - let's get back to basics and consider this:
- I don't know the rating of your helix lamps, but the factory fogs are 55 Watts (each) - which means that the new circuit has to tolerate 110 watts in total (assuming that the one relay is used for both lamps).
- So, using that well known formula Watts=Volts x Amps (let's forget about the difference between VA & Watts because this is a DC circuit) and using a notional battery voltage of 12 V - this means that the electrical current will be conservatively about 10 amps.
- 10 Amps means that your new ciruit will increase the existing load on the 40 Amp fuse by about 25 %. It's your call, but if I was installing this new circuit - I would install a new fuse from the car's voltage rail (somewhere convenient - but as close as possible to the battery terminal)
Just a further suggestion before you start installation - set-up the circuit as a temporary arrangement as proof of concept. Even though the circuit is simple - it's worth confirming that the Helix lamps will operate as we are believe that they should operate - IMO.
Don
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