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12-29-2011, 09:44 AM | #126 | |
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Went ahead and bought both of those switches as I want to take one apart, or overlay to modify the light to be red.
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01-02-2012, 09:07 PM | #127 | |
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Here is a link to an 08-10 OEM sedan rear fog from the same seller I got my hatch rear fog from: http://www.ebay.com/itm/08-10-Subaru...sories&vxp=mtr You may be able to get the factory switch (signal stalk) from them too, but I haven't figured out how to wire mine in, so you may want to just go to an aftermarket switch as others have done. Sorry for the multiple edits, but if you looks through their other Subaru parts for sale, it looks like they are parting out an Impreza (B-3) hatch as well as the sedan from the link above. Send them a message and see if they still have the rear fog\ for the hatch. One more: Factory signal stalk with rear fog switch- http://www.ebay.com/itm/07-10-Subaru...item4cf883e2cc Again, I haven't figured out how to make it work yet, because it links into the Body Integrated Unit in the car and the USDM cars don't have the rear fog enabled, but it's there for those who are interested. Last edited by Ogden; 01-02-2012 at 09:20 PM. |
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01-02-2012, 10:36 PM | #128 |
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^^ Thanks for the info.. Now I really want the stock switch. I just wired my up to turn on with the front fog lights.
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01-03-2012, 11:50 AM | #129 | |
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The trick is that it's a spring loaded switch, one step past where the front fog "click" is. So you turn on the front fogs, move it up to turn on the rear, and then it returns to the front fog "on" position. From everything I've seen, there must be a relay somewhere that latches in the power for the rear fog such that when you turn the car off, the rear fog will go off and not come on again, even if the front fogs are on. |
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01-03-2012, 02:04 PM | #130 |
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The stock Subaru w/rear fog just has some BIU logic to do that. But to wire yourself you'd need a latching relay. Too bad we don't have some wiring diagrams for Euro Impreza, perhaps the rear fog input and output logic is in the BIU already, but we would need to know which pins it is on to test it...
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01-03-2012, 02:13 PM | #131 |
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I have a diagram to build a latching relay that I was going to build to use in conjunction with the OEM switch. I haven't had a chance to investigate which pin/wire goes to the rear fog though. The pins for the switch are the same though.
Also, it's not not just the logic and wiring diagrams, there is an rear fog "enable" function in the BIU that you would have to get, presumably, a Subaru technician to turn on for you. In the manuals for the 2008 cars there is, somewhere, a list of all the functions that the BIU be used to toggle on and off including the rear fog, and the (unrelated to this topic but still useful) function that sets your rear defroster to cycle on and off to keep the rear window clear, instead of just timing out and turning off and you having to turn it back on every 15 mnutes or so. That sucks during a long, snowy commute. |
01-03-2012, 02:30 PM | #132 |
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anyone wire this up like a F1 car so if you're pitting you can make it blink really fast? also who got better bulbs? some of these pics look like ass. a bright red LED is needed for sure.
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01-03-2012, 02:35 PM | #133 |
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Ahh I see that now in the 08 FSM. Usually Subaru is good about not including any wiring or features in the FSM that apply to other markets. You know how long it took us to figure out the JDM mirror wiring ;-)
If the Select Monitor does really have that capability to turn that on, it would be great! Assuming it isn't already, we don't actually know how it comes from the factory, has anyone asked their local tech to check the stock setting? We don't still don't know what pins on the BIU though, we would need to know which one is the switch ground input, and which one is the output to energize the relay. One thing I liked about the stock Nav, you could change some of the settings of the car. The rear defog always on was the first one I changed. Almost makes the Nav swap and later selling that all off totally worth it. Now when I turn the defog on it stays on, which is nice around here. |
01-03-2012, 03:10 PM | #134 |
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We are thinking along the same lines.
I think that the BIUs are the same for all markets and the FSM has the information for all markets in it so that the dealer techs don't get mixed up finding functions that their FSM doesn't list when they go into the service the BIU. I'm wondering it's not just WAY simpler than we are making it? Why wouldn't this function just like adding the front fogs. Install switch, install lamp, toggle the logic in the BIU (which you have to do to add the factory front fogs), and viola! ? Maybe? I do think that the USDM clusters are missing the rear fog indicator, at least I can't see it on mine, so that does point to some hard-wired differences in the cars from each region. I'll look when I get home, but I would bet that if each reverse light has an individual wire running to it from the front of the car, it's probably all in the logic of the BIU. I looked at it a long time ago and don't recall at the moment. I checked with Cityside and Village Suabru, and neither of them seemed inclined to help me mess around with the BIU. Someone who has better/personal connection to a dealership might have better luck. And, I totally agree, turning the defroster to staying on once pushed is a huge incentive to adding the factory nav. Hmm... |
01-03-2012, 08:57 PM | #135 |
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Okay people, check it:
Don't know who this guy is, but some informative video: Rear fog in reverse mode (yep, reverse mode): Rear fog operating (would have been nice to see the other side for comparison): And finally, switch operation and dash indicator: European Impreza WRX 08+ Foglight Front/Rear switch The indicator is on the opposite side of the cluster from where I thought it was. If it wasn't colder than heck outside I'd go out and look for it on the dash right now. This leads me, even more, to think that this is a plug and play modification. We just need to get a Subaru tech on board who can toggle the BIU setting. Last edited by Ogden; 01-03-2012 at 09:11 PM. |
01-04-2012, 01:41 AM | #136 |
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Just a few quick general notes to the comments above and about rear fog lights on European cars.
1. The rear fog light/lights on all Euro vehicles goes off when you switch to high beams and goes back on when you switch back to low beams. When you turn ignition off the rear fog goes off until you turn on the switch again. 2. There is no pre-wiring and no relay for rear fog lamp in USDM Impreza/Forester. There is an empty slot in the dash fusebox - right next to the front fogs relay. No connectors, no wires, anything but hole. There is also no rear fog symbol and amber light in the cluster. 3. There is even no relay for the FRONT fog lights if the vehicle is not equipped with this option at the time of purchase (USDM). The relay that you have to install is part of the Front fog light kit - original accessory 4. Just one quick note about the differences between the USDM, EURO, UK and JDM dashboards USDM - LHD, speedometer - MPH, light switch stalk - left side, rear fog light not mandatory - some german imports come with it anyway EURO - LHD, speedometer - Km/h, light switch stalk - left side, rear fog -left side UK - RHD, speedometer - MPH, light switch stalk - left side, rear fog - right side JDM - RHD, speedometer - Km/h, light switch stalk - right side, rear fog right side (JDM switch stalk http://www.japanparts.com/images/Ima...ase=1&no=35689 ) Quick personal note: I'm originally from Europe and I'm getting my USDM '11STI 4-door ready for import to Europe (and for registration) so that's why I had to install the rear fog light. I wanted to have it as OEM as possible. But after extensive research of possiblities I found out that it is just too complicated to install Euro stalk switch (especially without SSM). So I decided to drop off that idea and I installed it with an auxillary switch as I described in my earlier posts. As mentioned above, Subaru vehicles are totally dedicated to the local market specifications. For example, it is not even possible to change temperature units (Fahrenheit to Celsius) or fuel economy units (MPG to liters/100km) with the Subaru Select Monitor tool. Or to set european settings for radio frequencies and nav system. That's why I doubt that it might be possible to enable rear fog light option in BIU or ECU in USDM Impreza. |
01-04-2012, 11:34 PM | #137 | |
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I think what got some excited is the US Factory Service manual does call out the rear fog light option in the BIU settings. The other stuff you mentioned is not called out, the BIU doesn't control frequency settings (Nav is actually diff part numbers US and EU) and there is not an option to change the units between standard and metric. What we don't know is if the SSM can change an option that says "not supported for North America" The lack of a rear fog indicator is a pickle, but the BIU simply sends a signal to the cluster to turn the fog indicator on, it may not be needed if one can live without the rear fog indicator. I have figured out how to swap Legacy keyless units and keys into the Impreza, and wire up JDM power folding mirrors. Did you know a USDM car has all the wiring in the door for signals and power folding? Sometimes manufacturing logic makes things like that happen. What I have found is it is these projects are never quite as easy as you think it might be at first. We don't really know if it will work until someone tests this. We really need a Subie tech to tell us if the SSM can even set that rear fog option. Ogden that is pretty cool it operates with the reverse lights as well. I don't understand why our local dealers are not more helpful, but I guess some service departments just stick to the path, anything without a procedure in the service manual doesn't compute. |
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01-05-2012, 10:08 AM | #138 |
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I don't see anything here that negates the possibility of plug and play option.
BIU different part numbers - The different part numbers could be due to the different settings, rather than actual hardware differences. My guess is that these come in from a supplier pre-configured for specific regions. It seesm unlilkely that the assembly ine worker (or robot) would take one part and then configure it one of multiple ways during assembly of the vehicle. Haivng it done by the supplier is a much more reliable and streamlined approach. Plus, we know that you can toggle several functions already (wiper heaters, front fogs, defroster), so why not more? Is uppose that there could be some sort of software lockout on the rest, but that seems like an extra step that wouldn't really be necessary or useful to the company. No relay - Good to know! I figured that one was missing somewhere, but wasn't sure where or what type of relay it is. The nice thing is that if the logic for the operation of the lights in built into the BIU, then this is likely just a simple relay. I was going to build a latching setup to mimic the funtion of the OEM setup, but I may not have to now. Lack of indicator - Could be problem if it is in the circuit for the lamp. If it's more of a side function then it might not be an operational issue, and you could wire up a simple LED pretty easily if you wanted to make your own. Wiring - So this might be a small challenge. It depends on the harnesses in the car and how universal they are. I haven't played too much with the parts I have, but I did plug in my switch and take a look athte connector. It has all of the same pins as the USDM switch and it plugs right in and supports all the USDM functions. I haven't pulled the existing swtich out of the car to compare the wiring (too dang cold to spend the time getting those 2 screws our that hold the upper cowling over the steering column on), but if it's the same and the connector has all the wires in it already, then the path to the BIU may already be in place. Downstream of the BIU...that may be more of a challenge, but probably not insurmountable. What's really driving this idea for me is that when you are mass producing something that has different versions and different options, the more you can keep things the same, the easier and cheaper it is to build. The more "different" the versions are, the more parts you need, the more logistical problems you create, etc. and Suabru is notorious for using the same parts even across different models. The switch for the rear fog is the same for the 09+ Foresters, 05-09 Legacys, and the 08+ Imprezas. Relays and switches cost money, but wiring is cheap. That's part of the reason that the wiring for things like power-fold mirrors, mirror signals, and the wiper heaters are in the big central harnesses for all of the Imprezas. As Power6 noted above, you just need to get the hardware for each end of the circuit. As noted, we need a dealer tech, or someone else with the equipment to change the BIU settings, to help us out. Also, getting the EDM wiring diagrams would also help. I haven't been able to source an EDM factory service manual...or any non USDM manual, for that matter. |
01-05-2012, 12:31 PM | #139 |
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Ogden, I think next steps here are to find the pinouts for the foglight functions, and then test them. A simple grounding of the input and and probing of the output should do. If that fails then find a subaru tech willing to poke around with the SSM to check the rear fog setting and turn it on.
This reminds me, I did the autowindow in my WRX, it was made for a Legacy but all the connections on the BIU were the same pin locations on the Impreza. Maybe if I can find a euro Legacy manual, we could guess the pins... |
01-05-2012, 12:54 PM | #140 |
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double post
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01-06-2012, 01:53 PM | #141 | |
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02-06-2012, 12:13 AM | #142 |
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bump anyone wire the rear fog to the front fog lights so that whenever the front fog lights are turned on the rear fog lights turn on as well?
sorry if this was discussed and i missed it. PS: i have a 2011 sti sedan |
02-06-2012, 12:00 PM | #143 | |
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Dude, just read the thread! It's not that big. |
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02-07-2012, 05:13 PM | #144 | |
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BUT, if you wire the rear fog to the front lights and you add extra switch just for the rear fog (that's what I did) you can turn the rear fog on separately. Of course it will work only when the front fogs are on. Check my post #118 in this thread, I just added a closed up pictures of that switch installed in the dashboard. This is a typical setup for many european cars. Usually there is a three position switch (off/front fogs/front fogs+rear fog) so you can't turn the rear fog on without the front ones. Last edited by cubiculus; 02-07-2012 at 11:05 PM. |
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02-07-2012, 09:59 PM | #145 |
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The OEM Subaru rear fog switch is also 3 position.
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02-16-2012, 02:13 PM | #146 |
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It's worth the effort! Especially in the heavy down pours rain, help me NOT get "REAR ENDED" The guy behind me said he could not see me if it was not for that light, too too much water.
Last edited by ZURCALED12; 01-29-2013 at 03:13 AM. |
02-16-2012, 02:26 PM | #147 |
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02-16-2012, 02:46 PM | #148 |
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I fixed it for ya.
Here ya go. Its in stock and ships fast..lol http://www.rallysportdirect.com/STI-...n-WRX-STI-2011 |
02-16-2012, 02:55 PM | #149 |
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I was waiting for someone to do exactly what cubiculus did. I wanted a switch for the rear fog, but I'm not committed enough to search for those kind of things on my own.
Now I'm much more compelled. How do non-USDM switch their fogs on/off? Must research... Odd that something's actually in stock there! haha $200 for everything isn't bad. I don't mind cutting out a spot for it, either. Sounds kinda fun (cutting the bumper, not cutting in general). |
02-16-2012, 06:51 PM | #150 |
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As mentioned before, the non-USDM version have different switch on the light switch stalk. USDM version have just 2 position fog switch (off/front fogs on), non-USDM version have 3 position fog switch (off/front fogs on/front fogs on + rear fog on).
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