Forum Vendor has Rear Fog Light and CF Front Emblem!

[wstar]

Originally Posted by Minicobra1

dont we already have this setup without the lens cover? Seams like we should should just be able to replace the lens cover. The box and the wiring harness already seam to be there.

Yes, I took mine apart today to look at it. Basically, in place of an actual rear fog lamp, we have a "reflector" (a very poor one) mounted on a box that's the same size/shape a real lamp. There's also already factory wiring coming from the same harnesses as the rest of the rear lighting. The plug is plugged into a dummy socket next to the reflector box, to hold it there in place. Presumably one could buy the real fog lamp unit from the JP/EU models and just plug this connector into it.

The big question mark is: where does the other end of that pair of wires go? I pulled out the little area in the center console that has the cup holder and heated seat switches (empty center switch bay there) - there's no "unused" connectors laying around anywhere obvious under there, so it's not pre-wired to that area. There are no unused control settings on our left stalk that might be prewired to it. I'm lost as to what they did with the other end of the wires.

Most likely, assuming the EU one is controlled from the stalk (can anyone confirm this?), it's probably wired to the harness connector for the stalk, but our stalk just doesn't use those pins, or those wires are simply cut off in the vicinity of the steering column.

[SoCal 370Z]

Originally Posted by wstar

Most likely, assuming the EU one is controlled from the stalk (can anyone confirm this?), it's probably wired to the harness connector for the stalk, but our stalk just doesn't use those pins, or those wires are simply cut off in the vicinity of the steering column.

Yes, it is controlled from a rotating inner switch on the turn signal stalk that is not on our cars:



When I installed the illuminated door sills I learned that the harnesses are not complete, but car specific. Mostly likely the dummy plug does go to a legit wiring part of the rear harnesses, but no farther.

[wstar]

Originally Posted by SoCal 370Z

Yes, it is controlled from a rotating inner switch on the turn signal stalk that is not on our cars:



When I installed the illuminated door sills I learned that the harnesses are not complete, but car specific. Mostly likely the dummy plug does go to a legit wiring part of the rear harnesses, but no farther.

Hmm that kinda sucks. So we'll need to find exactly where the other end of the existing wiring is, and figure out easy or hard it would be to route this to the center console's unused switch area I bet, and then find a matching switch. We could probably order replacement heated seat switches, figure out a pin mapping that works, and then carefully modify the labellling on them. I don't know why they left this off. I've never had a rear fog lamp, but after reading up on it, it sounds really useful to me in heavy fog conditions (which are very common early in the morning in TX, especially out of town).

[SoCal 370Z]

Originally Posted by wstar

Hmm that kinda sucks. So we'll need to find exactly where the other end of the existing wiring is, and figure out easy or hard it would be to route this to the center console's unused switch area I bet, and then find a matching switch. We could probably order replacement heated seat switches, figure out a pin mapping that works, and then carefully modify the labellling on them. I don't know why they left this off. I've never had a rear fog lamp, but after reading up on it, it sounds really useful to me in heavy fog conditions (which are very common early in the morning in TX, especially out of town).

Nissan has done a great job of routing the harnesses on the 370Z so finding the lead and getting to a user installed switch should be achievable without too much grief.

[wstar]

Originally Posted by SoCal 370Z

Nissan has done a great job of routing the harnesses on the 370Z so finding the lead and getting to a user installed switch should be achievable without too much grief.

Ok, I just did some preliminary research on this in the Service Manual and by digging around in the appropriate places in the car. It appears that the rear fog lamp circuit is fully wired all the way to the Body Control Module (BCM). The BCM is basically a small CPU unit separate from the main ECU that resides down at the bottom of the outer side of the passenger footwell that handles a lot of little body electrical things like wipers, map lights, flashers, headlights, foglights, etc. BCM is covered in the "BCS.pdf" section of the Service Manual.

Pin 24 on connector M120 of the BCM has an orange wire plugged into it which drives the fog light with a 12V signal directly (diagram is on pg 52 of BCS.pdf). I haven't confirmed this with a continuity tester or anything yet, but it's not likely that it's disconnected anywhere in the middle.

Odds are high that if you put a light back there and swapped in the Canadian version of the headlight/wiper control sticks module, it would Just Work, or worst case, would need some programming a dealer could do to enable the fog light.

Alternatively (more likely what I'll try to do), it would be easy to snip the orange wire near the BCM connector and run it to that unused center console switch area.

[SoCal 370Z]

Originally Posted by wstar

Ok, I just did some preliminary research on this in the Service Manual and by digging around in the appropriate places in the car. It appears that the rear fog lamp circuit is fully wired all the way to the Body Control Module (BCM). The BCM is basically a small CPU unit separate from the main ECU that resides down at the bottom of the outer side of the passenger footwell that handles a lot of little body electrical things like wipers, map lights, flashers, headlights, foglights, etc. BCM is covered in the "BCS.pdf" section of the Service Manual.

Pin 24 on connector M120 of the BCM has an orange wire plugged into it which drives the fog light with a 12V signal directly (diagram is on pg 52 of BCS.pdf). I haven't confirmed this with a continuity tester or anything yet, but it's not likely that it's disconnected anywhere in the middle.

Odds are high that if you put a light back there and swapped in the Canadian version of the headlight/wiper control sticks module, it would Just Work, or worst case, would need some programming a dealer could do to enable the fog light.

Alternatively (more likely what I'll try to do), it would be easy to snip the orange wire near the BCM connector and run it to that unused center console switch area.

This is exactly the area where you wire-in the illuminated doors sills. The issue is that pin 24 might be vacant. However, the harness run is through metal protecting clips with room to spare so even if there is no occupied pin or wire it is a straight shot to the block.

[wstar]

Originally Posted by SoCal 370Z

This is exactly the area where you wire-in the illuminated doors sills. The issue is that pin 24 might be vacant. However, the harness run is through metal protecting clips with room to spare so even if there is no occupied pin or wire it is a straight shot to the block.

It's not vacant, that's what I checked. As stated in the SM, there actually is an orange wire coming off of the body wiring harness plugged into pin 24 there.

[Mr_Z]

Originally Posted by wstar

Ok, I just did some preliminary research on this in the Service Manual and by digging around in the appropriate places in the car. It appears that the rear fog lamp circuit is fully wired all the way to the Body Control Module (BCM). The BCM is basically a small CPU unit separate from the main ECU that resides down at the bottom of the outer side of the passenger footwell that handles a lot of little body electrical things like wipers, map lights, flashers, headlights, foglights, etc. BCM is covered in the "BCS.pdf" section of the Service Manual.

Pin 24 on connector M120 of the BCM has an orange wire plugged into it which drives the fog light with a 12V signal directly (diagram is on pg 52 of BCS.pdf). I haven't confirmed this with a continuity tester or anything yet, but it's not likely that it's disconnected anywhere in the middle.

Odds are high that if you put a light back there and swapped in the Canadian version of the headlight/wiper control sticks module, it would Just Work, or worst case, would need some programming a dealer could do to enable the fog light.

Alternatively (more likely what I'll try to do), it would be easy to snip the orange wire near the BCM connector and run it to that unused center console switch area.

Hi,
could you provide a link to the BCS.pdf. I really need to look at it and I don't know where to get it. Thanks in advance

[wstar]

Originally Posted by Mr.Z

Hi,
could you provide a link to the BCS.pdf. I really need to look at it and I don't know where to get it. Thanks in advance

Try downloading the service manual, over in the sub-forum about service manuals