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Old 3 Weeks Ago   #1
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Pin assigment high beam / DRL / pos. light?

Hello guys,

can anybody here help me with the pin assignment if the DRL/hig beam's connector? So in my opinion the little thicker green one, close to the black one ist for the high beam, black is common ground. But Iīm not sure with the thinner green one and the yellow one, which is for DRL and which for position light??

Thanks a lot!
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Old 3 Weeks Ago   #2
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Re: Pin assigment high beam / DRL / pos. light?

So it should be possible using a meter and the respective lamp holder inside the cluster to work out which pin does what ?
From the book,
Black ground/negative
Yellow/black stripe DRL feed right hand side, green/yellow stripe left hand DRL

Green/yellow stripe right hand side light, yellow/red stripe left side light

Note there is one wire colour(green/yellow) on each side with the same colour but has different functions!
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Old 3 Weeks Ago   #3
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Re: Pin assigment high beam / DRL / pos. light?

Hello John,

first of all thanks for that information. Surely I could have measured it with a meter, but I was asking here hoping that somebody knows it. As with the Abarths relatively big tires and lowering, you need to at least jack up the car to get access and work to some extent at the connector, better remove the complete wheel. Itīs winter, dark and cold...honestly said I wanted to avoid this and create the load adapter on the desk.

Basically I want to do the same like this guy https://www.fiat500owners.com/thread...tor-mod.15698/ but he did for an US model (with turnlight instead of hig beam located in there) and I donīt want to solder on my original wiring harness, due to the fact the vehicle is quite new and an I donīt want to loose guarantee....
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Last edited by Olliver; 3 Weeks Ago at 21:36.
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Old 2 Weeks Ago   #4
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Re: Pin assigment high beam / DRL / pos. light?

So this will be the assignment according to your information for the left side:






And it fits also to the posting of the guy who did this to his US-model.






But what I donīt understand is, why Fiat didnīt use the second of the two inner pins for the high beam, as they are bigger and so can handle higher current? That the ground pin was one of the inner pins was clear to me, but why they connected the DRL to it? DRL is only 21W, high beam is 55W....for US models itīs not a problem as instead of the high beam, it has only to handle the indicator.
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Old 2 Weeks Ago   #5
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From the Haynes manual for 07-2012
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Old 2 Weeks Ago   #6
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Re: Pin assigment high beam / DRL / pos. light?

Hello John,

please donīt misunderstand me, I didnīt want to question your post, I was totally believing in it. I was only wondering why Fiat did it this way. Thatīs all.

You can clearly see the inner pins are bigger.
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Quote Originally Posted by Olliver View Post
Hello John,

please donīt misunderstand me, I didnīt want to question your post, I was totally believing in it. I was only wondering why Fiat did it this way. Thatīs all.

You can clearly see the inner pins are bigger.
No problem just thought this would make it as clear as possible to help you, if you need the high beam wiring image let us know 😀
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Old 2 Weeks Ago   #8
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Re: Pin assigment high beam / DRL / pos. light?

No thanks, I think the high beam wiring is not necessary. I now got the male socket housing, only waiting for the pins...then I can start assembling the adapter. Female socket is no problem as it is offered already with cables as repair kit for the wiring harness on ebay and co. .
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Last edited by Olliver; 2 Weeks Ago at 09:35.
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Re: Pin assigment high beam / DRL / pos. light?

Quote Originally Posted by Olliver View Post
No thanks, I think the high beam wiring is not necessary. I now got the male socket housing, only waiting for the pins...then I can start assembling the adapter. Female socket is no problem as it is offered already with cables as repair kit for the wiring harness on ebay and co. .
Are you fitting LED's ?
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Old 2 Weeks Ago   #10
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Re: Pin assigment high beam / DRL / pos. light?

Yes I want fit LEDs for DRL, but I want to be able to remove everything without remains. So no mods to the original wiring harness. First I was trying fit everything inside the beam, but there is not so much space left, as the high beams are already also LED and the resistors became quite hot and I also didnīt wont to cut the rubber cap to keep then outside. In addition the aftermarket 7440 sockets didnīt fit good in the beam...so I went for this solution.
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Old 2 Weeks Ago   #11
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Quote Originally Posted by Olliver View Post
Yes I want fit LEDs for DRL, but I want to be able to remove everything without remains. So no mods to the original wiring harness. First I was trying fit everything inside the beam, but there is not so much space left, as the high beams are already also LED and the resistors became quite hot and I also didnīt wont to cut the rubber cap to keep then outside. In addition the aftermarket 7440 sockets didnīt fit good in the beam...so I went for this solution.
If you use several resistors in parallel then they will not get as hot and are smaller but you have more of them ?
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Old 2 Weeks Ago   #12
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Re: Pin assigment high beam / DRL / pos. light?

For the "inside solution" I used two 33Ohm / 10W ceramic resistors in parallel. For the adapter cable I will assemble now, one 15Ohm / 25W resistor with metallic housing that is able to handle 12,5W @ 25°C beeing mounted free air.

https://www.vishay.com/docs/30201/rhnh.pdf


Should be enough, but to be on the safe side I will attach a small additional heat sink to it.
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Old 1 Week Ago   #13
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Re: Pin assigment high beam / DRL / pos. light?

So since today I know, that the Haynes manual is not valid for my car. Is it due to the fact itīs a face lift vehicle (year 2020)? Or is the plan in Haynes manual only for US models? So my colours are different, gren-yellow is DRL, thick green is high beam black ground, and yellow is position light.
But in the end it worked without an error message in the dash.
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