Setting Up My Fog Lights to Oem, Know What Wire is the Fog Wire 4 the Engine Fusebox? - Chevy Cobalt Forum / Cobalt Reviews / Cobalt SS / Cobalt Parts
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post #1 of 39 (permalink) Old 08-08-2012, 04:45 PM Thread Starter
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Setting Up My Fog Lights to Oem, Know What Wire is the Fog Wire 4 the Engine Fusebox?

So wiring my fog lights to my switch on the dash. Anyone know the wire to tap or splice into underneath the engine fuse box?

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post #2 of 39 (permalink) Old 08-08-2012, 04:47 PM
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I'll check and repost here.

Switch pin-out;

If I understand correctly you want to wire your Cobalt OEM. Here is C2 pin-out where you will find the fog relay control pin "C3".


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post #3 of 39 (permalink) Old 08-08-2012, 05:07 PM Thread Starter
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That is awesome Coby!! That is the plug i know I need to splice into, but I'm unsure of which yellow to splice into:S

---------- Post added at 05:07 PM ---------- Previous post was at 04:52 PM ----------

[QUOTE=Coby7;578474]I'll check and repost here.

Switch pin-out;

If I understand correctly you want to wire your Cobalt OEM. Here is C2 pin-out where you will find the fog relay control pin "C3".

Thanks for the quick help, can I just wire the power to the four plug fog switch by the dash?


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post #4 of 39 (permalink) Old 08-08-2012, 05:15 PM
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OK, here comes ....D5 of "C3" will have power from the Fog relay 2 purple wires.



---------- Post added at 09:15 PM ---------- Previous post was at 09:10 PM ----------

When you press the fog switch it applies a ground to the orange wire. This signal goes to BCM which in turn latches the fog relay via a yellow wire pin "54"(Oops I'll get that pin-out for you also) that goes to underhood fuse block to C2 pin"C3" which turns on relay that gives you power on pin "D5" of connector C3.


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post #5 of 39 (permalink) Old 08-08-2012, 05:23 PM Thread Starter
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Alright I believe you know what you're saying but please just turn it into english Hook up my powers to which wire?? Also I have my two grounds on my fogs to their own ground. Is that Alright?

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post #6 of 39 (permalink) Old 08-08-2012, 05:25 PM
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Do you have OEM wiring?

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post #7 of 39 (permalink) Old 08-08-2012, 05:26 PM Thread Starter
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Nope, just the red and wire wiring from any auto store. 14guage

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post #8 of 39 (permalink) Old 08-08-2012, 05:33 PM
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Yes, normally the two fog lamp grounds would go to 2 seperate ground lugs on the car, drivers side just below the brakeline block or ABS block on the sub frame, the other ground lug is on the passenger side (not sure where at this moment but I can find out). Your power wires will go to pin "D5" of connector "C3" under fuse block (Should be 2 purple wire if U have OEM wiring. Also if you have OEM wiring the wires will be tied and tucked away inside inner fenders in front.

---------- Post added at 09:33 PM ---------- Previous post was at 09:31 PM ----------

Sorry, this is the best plain english I have.

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post #9 of 39 (permalink) Old 08-08-2012, 05:35 PM Thread Starter
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Well I'm not sure if your talking about the oem wires from my dash, which I do have. Or whether I have the oem wires running down to connect to fog lights, which I don't. I just have the dash trim with the fog switch option on there, connecting to my fog female plug. I hope this helps clear things up

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post #10 of 39 (permalink) Old 08-08-2012, 05:36 PM
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Did your car already have the fog switch or you salvaged one?

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Drives 2016 Sunset Orange Trax LT1 1.4L Turbo auto 3GNCJPSB8GL142716

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