I'm not sure if this is in the correct place, but it's not (at the moment) specific to any specific Honda. When I install it in my Civic, then I suppose information itne the thread may be skewed more to a 7th Generation Civic... @Staff if you feel this should be moved, please feel free. Anyways.... I bought a cracking Honda HDD Navi (08A40-2L6-100), plus official Honda bluetooth accessory at a REAL bargain price, and having opened it up, read the installation instructions (for an FK Civic) and the extra (VERY helpful) information sent to me, I have a few questions. This unit was installed in a Ford C-Max (I think) previously, so the wiring harness has been cut and spliced to work in a C-Max. Also, I think part of the wiring harness is missing (as I seem to be missing part of it compared to the installation instructions). Nonetheless, from what I understand, I 'simply' need to cut the modified HDD Navi wiring harness and splice it up with the correct wires for the wiring harness / adaptor currently in use on my Civic (with a Pioneer head unit). To better explain what I am referring to with my questions, I've included some pictures. In the image below - 1 = GPS antenna 2 = modified wiring harness (big black end connected to C-Max. Blue end goes into the HDD Navi 2a = 4 Wires come out of the connector plug on this, which are not used (confirmed this in the circuit diagram sent to me with the unit) 3 = Navi Harness. This has also been cut it seems (compared to install instructions), as both ends should have connector plugs on them, but only one does) 3a = seems to be where the Navi harness was modified, with the connector plug being cut off. Has 3 wires (orange, brown and blue) 4 = Connector cable for the Honda Bluetooth accessory (BUS Cord) 5 = Honda bluetooth accessory (HFT ECU) 5a = Microphone (very short cable, even though install docs say MIC and bluetooth box go on separate sides of the car...) (MIC) 5b = Another mono audio plug (SUB Cord) So... questions I have about the parts above are - 3a - Circuit Diagram that came with the unit (see extracts below), shows the Navi harness as having Blue, Brown and a Light Blue wires, whereas in fact it has Orange, Purple and Blue. Questions - 1 - Does BLUE on the Navi harness goto Speed Sensor ? 2 - Does PURPLE on the Navi harness goto hand brake ? 3 - What does ORANGE on the Navi harness connect to ? The next 3 questions refer to picture of cables above, as well as circuit diagram extract below 4 - Does it matter which end of the BUS cord plugs into HDD Navi? One of them is at 90 degrees, and the other is straight, but connector plugs are the same 5a - Am I correct in assuming the MIC plugs into the IN port on the Bluetooth Accessory ? 5b - Am I correct in assuming the SUB Cord goes from the OUT port on the Bluetooth Accessory to port 1 on the rear of the HDD Navi (See below) ? I have also included a picture of the rear of the HDD Navi unit, as I do not know what all the port are for. 1 - Is this for SUB Cord from the Bluetooth Accessory ? 2 - Apple connector cable, which I am not using 3 - Navi harness 4 - GPS Antenna 5 - BUS Cord 6 - Wiring harness 7 - What's this for ? 8 - What's this for ? 9 - Car antenna Not shown - where do I connect my reversing camera (RCA plug) and Dashcam DVR (RCA plug) Not shown - where do I connect my steering wheel controls ? In addition to the questions above, I was also wondering what would happen if I didn't connect the speed sensor wire of the Navi harness ? What would and what wouldn't work ? (I realize I already asked this in my project log, but thought best to keep all questions in one place). I initially thought I would have to go ahead and buy an attachment kit (which includes wiring harness) for this unit, but I think that if I can answers to the questions above, I should be able to get this done myself (very slowly and carefully), even if (for the moment) it will not support my reversing camera and dashcam DVR.