I had a bit of fun today after installing my new TRD SS & Bushings, and after being rear-ended I knew this was one mod I totally had to have. Full credit goes to Thomas who wrote up a bit about this mod in the xB1 forum (and I will be doing this for my '05 xB in due time).

http://www.youtube.com/watch?v=o0u04IWkXq8

So the item I purchased is the IBF4 from comagination.com and you can find it right here:

http://www.comagination.com/bflasher.htm

Only thing we need to learn on any new vehicle is which wire does which, since there is never an obvious red/black wire setup for power/ground. So I had to guess and do some poking around to learn how to make this work.

Thomas provided a great wiring diagram for the xB1:
http://tijil.org/brake_light_wiring02.gif

The G-W wire on our car is the Yellow wire, and the W-B is the Brown wire.

In order to get to the wires for the 3rd brake light only (you can opt to make all 3 brake lights flash but that is another location to tap), you will need to remove the inner black panel on the hatchback. It is held on by plastic pop tabs, so...you guessed it, just yank (damn Lego cars). You will also need to get 2 black pop tabs on the sides, but it comes out easily.

When the panel is pulled out, you will see this:

http://img685.imageshack.us/img685/1083/20110709001.th.jpg (http://imageshack.us/photo/my-images/685/20110709001.jpg/)

The 3rd brake light is easy to find, but here is a closer look:

http://img714.imageshack.us/img714/2084/20110709002.th.jpg (http://imageshack.us/photo/my-images/714/20110709002.jpg/)

Easiest way to connect the IBF4, is just like the wiring diagram shows. Tap the blue and red wires coming out of the flasher into the yellow wire on the tC, and tap the ground wire as well. Then comes the pucker part... cut the yellow wire in between where you tapped. I don't have any photos of this part, mostly as mine got all sorts of ugly due to some other issues (don't have someone test the brakes, if that person doesn't know there is a clutch on the car, just don't). There is PLENTY of room for the flasher itself to sit near the brake light. A small square of 3M double sided tape will secure the flasher to the hatch, and you are good to go.

Looks good! I've seen this on motorcycles a lot but not many cars.

So my first commute to work with this installed... EPIC WIN.

I normally have multiple people on my arse during the commute, traffic in Northern VA is no joke, but today I had SO many folks ease back once I tapped the brakes, the flashing 3rd brake light REALLY helps alert people that YES FOOL I AM STOPPING!

Do you have to hold the brakes down for the light to do its thing? Or can you just tap the brakes and it will still do its thing?

If you tap the brakes the 3rd brake light will flash twice, at least, that is what I've seen while having someone tap the brakes.

Small update, had a Fairfax County PO follow me at night for about 4 miles with 2 stoplights in between, and they didn't give me any trouble.

Even if they did, I have the instructions in the dash with the CA DOT Approval. :)

Not trying to poop on your idea, but it just looks like a light that has a short in the ground. Thats just me though. You've already said that you have had an improvement in results with other drivers. I drive in Atl traffic all the time and there are countless cars that either don't have working tail lights or faulty wiring. It really sucks especially during rush hour.

^^ AR has no state inspection, I see at least one car per day with 0 (zero) working brake lights, I feel your pain. I agree with the shorted out look, that last flash is kind of wierd, but none the less, I have my flasher on order. The website says the flashes will vary so maybe I will get lucky. Probably going to put one in my wifes car too.

I have had my flasher for about month, but just got it in today. Mine looks just the same as far as the half flash toward the end that almost looks like a short, but it only does it like every 4th time you hit the brakes. I am actually excited about going to work tomorrow so I can test it out in traffic and see if it keeps the Arkabillys from riding my A$$ at 70 MPH.