Disclaimer: The following is provided as a GUIDE ONLY, and neither myself, nor FITFREAK.NET take any responsibility for the outcome of someone else doing the following. You follow these steps at your own risk!
I wanted to create a proper how to at the end, but here are the steps I've done so far. I purchased the steering mounted radio controls (included the bluetooth buttons not shown) and the steering sub-harness from
Ben at AJ-Racing.
Since I have a
manual Fit Sport, there are 4 available pins in the cable reel.
These 4 pins are used on the automatic Fit Sport for the paddle shifters. The other Fits use a different cable reel and have no spare wires.
First thing you need to do is unplug the battery and turn on the lights. This will drain any power stored in any electronic devices in the car.
Then the fun part, removal of the airbag. With the steering pointing down, there's a cover on the steering wheel near the steering column. Remove it and unplug the yellow connector. There are two torx bolts, one on each side. They are at an angle, so don't strip them! Then the airbag can be removed and the horn connector unplugged.
Remove the stock sub-harness.
Three wires from the new sub-harness need to be removed (only two if you don't care for the bluetooth controls) from the harness plug and two wires cut for the back lighting of the buttons, and then added to the existing steering wheel sub-harness.
Start by removing the plastic wire holder. I used a slotted screwdriver (flat tip) to pop both sides of the connector.
Once that's out, I used a pin to unclip the wire from the plug. If you insert the pin under the connector, you'll eventually release the holder and the wire and connector will slip out. For the steering controls you need the brown wire (common ground) and green/red wire (signal). Remove the grey wire too if you want to wire in the bluetooth buttons. Two or three more wires with connectors will be needed for the other side of the cable reel (identical white plug BTW). You can either remove them now or later.
Here you can see where I spliced and soldered the red and the red/black wire for the button back lighting. I then taped up each wire and the harness to keep all the wires neat and tidy (not shown).
Removing the blank trim on the steering wheel requires removing two phillips bolts from behind (I had the screwdriver pointing to the tilt handle) and one from the front. There's also a rubber holder at the bottom spoke. I then installed the new one in the reverse order.
Here's the sub-harness reinstalled in the steering wheel. I passed the harness under the plastic trim for the stereo controls like the stock one was routed for the cruise control wiring. The circled grey wire goes to the stereo controls and the green one is for the bluetooth controls (not installed, yet

).
The other connector for the cable reel is located behind the upper steering column cover. Three phillips screws under the steering column and the rest are pressure clips. Same white plug as pictured above. I placed the wires at the same spot as I did on the steering wheel side of the cable reel.
I ran the two wires for the stereo from that white plug to the back of the radio to find out the damn radio didn't respond to them.
GRRR...
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Vivid Blue Pearl 2007 Honda Fit Sport MT
My list of Goodies...
JDM Honda stuff: LED tail lights, armrest, leather shift knob, coin tray, roof console, steering mounted radio controls.
Honda Canada stuff: rubber floor mats, trunk liner, cargo cover, cargo net, re-keyed locking gas cap, exhaust tip finisher, lock nuts.
ICE: JVC KD-AVX33 headunit, PAC SWI-JACK.
Other items: Eibach Pro springs, CL map lights with Homelink, LED 3rd brake light, tint.