Land Rover Discovery 3 Multimedia Installation Manual
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A www.disco3.co.uk resource Page 20 The pictures above are showing how I threaded the power cable extension for the GVIF reverse sensing switch, but the process is the same for the camera RCA video cable. It’s a good idea to feed this cable from the rear as well as it’s easier than doing it the other way arou nd. Leave the end of the reverse sensing powe r extension in the cubby for now, we will join it up shortly. You now need to remove some trim from the kickpanel of the doors, both front and rear passenger side (this is unavoidable as the plastic trim is in one pi ece but also desirable as we’ll work under the front passenger seat as well). Start with the lower trim of the pillar next to the front passnger side under the seatbelt; 4 clips hold it in place, just pull towards the seat and it’s out. Next, lift the plastic tri m with the LR logo on it until th e clips give way. There are from memory 7 clips all together, all of which will give way but remain in the floor panel end (where the OEM wiring harness goes under). It is important you CARFULLY lift those out with some pliers or tweezers, if th ey fall through it ’s a real pain to retrieve them. Push them back to the plastic trim for refitting later. (rear section clips location) (front section clips location) Next, we need to gain access under the front passenger seat trim to thread the video cable and reverse power sensing cable to the GVIF. I found that simply unclipping (1 clip) the black side trim of the seat base front gave me enough clearance to slide my fingers and cables und erneath. I fed th e GVIF reverse power (grey) cable from under the seat, under the rails and under the carpet (there is a seam under the seat) and the video cable from the outside to under the seat. (side seat panel trim pulled back) (GVIF reverse power cable and video signal)
A www.disco3.co.uk resource Page 21 To join the GVIF reverse power cable with the extension we fed earlier, I used the same non ‐elegant way as before of twisting, tinning, heatshrinking and taping to maintain a low profile of the joint for when the trim is refitted: (GVIF end –grey ‐ and extension from rear twisted and joined) (heatshrunk and taped) You may notice I threaded a twin power extension here as well, this was done simply because that’s what I had to hand but also gives an additional single core line to the boot if needed in the future. The video cable simply plugs into the corresponding input of the GVIF. On ce everything is com plete, use cable ties to tidy up and line the cables in the groove of the sill before refitting the trim: Make sure the felt sits properly over the plastic trim all around and refit the seat base black panel and tidy up the cabin, the remaining work is at th e boot area.
A www.disco3.co.uk resource Page 22 The last bit to do is to wire up both the camera power and the GVIF reverse power to the reversing light so they can both be triggered automatically when in reverse. We need to remove the rear left light cluster for this, it’s primarily clipped on, held by two screws on the bodywork to wards the tail gate. Once you have undone the screws, pull the light cluster backwards to release the holding pins and undo the connector. Put the light to one side and in the wiring that ends in the connector locate the GREEN with BROWN wire (that’s the reverse +v e) and the ALL BLACK wire ( ‐ ve). Locate the camera power cable we left in the rear left cubby and thread it through the opening behind the light cluster, under the top flap. To locate this from the inside, I just felt me way with my hand, but be caref ul not to know any thing else out of place! Then using snaplocks, join the red (+ve) wire to the GREEN and BROWN wire and the black ( ‐ve) to the ALL BLACK wire: (camera power extension fed through...) (...and snaplocked in place)
A www.disco3.co.uk resource Page 23 Now locate the power extension cable of the GVIF, thread it through the same hole and snaplock that to the red cable of the camera power cable (you could also join this to the same snaplock used before, but I chose to have them separate for ease of troubleshooting if needed. Note I shortened and tape d the unused black wire from the GVIF power extension for good measure . Tuck the cables as far back as possible, refit the connector to the light cluster and re ‐assemble everything (the light cluster, boot panels, roof panel, weatherstrips....). For me, that was it as far as installation goes, I fitted the GVIF with strong double Velcro next to the factory Nav DVD unit (there’s a metal plate with enough room to the right), tidied up all cables under the seat with cable ties and connected the RCA cables from my AV inputs to th e GVIF. I also con nected the audio output from the GVIF to my pre‐existing cabling (audio only) from the “inexpensive AV modification” (see “Maintenance & Mods (D3)” on the forum), which I relocated t behind the lower glovebox as I no longer have need to have access to it. In hindsigh t, and given I now want to have the ability to see the camera image without putting the car in reverse, I have considered rewiring the power to the camera to be fed by the power socket in the boot. To do this, the process is similar to what is descri bed above, but use only one snaplock to the rear light cluster for the GVIF reverse sensing cable. Feed the camera power cable as described, but instead of threading it through the flat to behind the light cluster, feed it upwards to the aux power socket. Then use snaplocks to tap both +ve and –ve fr om ther e. The socket cable and plug is reasonably accessible simply by pulling out the left boot trim as described above. If you (like me) undo the snaplocks, remember to tape over the wires they were attached to, to avoid short‐circuits or re ‐fit the GVIF’s cable snaplock wh er e you had joined the camera. In the end however, I decided to have a slightly more complicated power setup for the camera: as part of another mod I am in the process of making, I wanted the camera to take power either by a switch fitted in the front so I can feed a mul t iplexer which goes to AV3 of the GVIF, or automatically power up when in reverse. To achieve this, I fitted a 5 ‐blade changeover relay with connections as follows (more on this mod in a different guide):
A www.disco3.co.uk resource Page 24 Part III – Putting everything together and operating The way we have set up the GVIF, it will power up and operate when the key is in position I. There are a number of settings the user can change by use of the supplied IR remote control, the receiver of which as mentioned above you can either permanently fix as I have done, or plug in temporarily to make all your adjustments and then remove. This is how my dashboard looks when all cables have been tidied away: Highlighted are the IR receiver and the source switch. I have threaded the IR receiver cable under the passenger seat runners, u nder the carp et joint and then under the left side of the centre console, simply by tucking it under, then threaded it up the left side of the head unit and HVAC controls (while the H‐ trim was off). In a similar way I also threaded the RCA AV cable for the DVD, though that went be hind the top glovebox. Similarly on the right side I put the switch button cable: (IR receiver and RCA AV cable) (AV selector switch cable)
A www.disco3.co.uk resource Page 25 Chapter II – DVD player installation Why have a DVD player? (as opposed to a hard disk/USB media player). I chose the VEBA AV ‐2705 unit as it features the most versatile options for playing media in my view: conventional DVDs, CDs, almost every type of audio file, almost every type of video file, most common picture files, has enough inputs/outpu ts for feeding both the GVIF and rear screens while also being able to be used as a pass‐ through for say an extra TV tuner, and to top, all the above can be done from either of three media: disks (CD/DVD, any FAT and FAT 32 formatted USB drive or any FAT or FA T 32 formatted SD card – though this unit only supports low speed SD cards). Accepting disks is also convenient on the move, in case someone in the car buys say a new DVD that you just have to watch there and then ☺. There are of course many other alternatives including other players supporting a variety of formats. How much will it cost? The unit in question cost just shy of GBP 90 including delivery, brand new. Given the wealth of choices and form factors, the price ra nge will vary gr eatly with what you choose to fit... Any other things to know before proceeding? Nothing too important I think. The connections are quite straight forward, this unit has two +ve power cables (as do most car‐specific players I understand), the second being to keep a low draw from a permane n t live source for resuming to last position played. Location is another consideration, I chose the upper glovebox at the expense of storage space as I wanted to have access to the slot ‐loading opening of the unit on the move. This unit comes with approximately 4m worth of cable for the remote re ceiver, so if you need the space and don’t want constant access to the loading slot, then you can place the unit pretty much anywhere (just keep in mind cabling to the GVIF and power sources).
A www.disco3.co.uk resource Page 26 Part I – Removing the upper glovebox. Tools required: Your hands mostly, you may have use for a plastic blade or flat screwdriver with electrical tape around the business end. Parts required: None really; you may also want to have a few spare metal clips (part no FYC500040) just in case you lose any and can’t find them. This is rela tively simple: remove the left airvent by pulling it out (three of the usual metal clips hold it in place), remove the CD rack from the glovebox by pinching the plastic clips that hold it in place (if you have it), remove the H‐trim if it’s on and th en pull out the glovebox– HA RD (there are a number of metal clips holding it in place, eventually they will give way). I found that pulling top and bottom was easier than left and right. Put it to one side for the moment.
A www.disco3.co.uk resource Page 27 Part II – Preparing the cabling Tools required: cable stripper, crimping tool, pliers, long reach Phillips screwdriver, drill with 8mm metal drill bit, 20mm hole cutter, soldering iron, electrical tape, heatshrinking tube and about ½ hour for this part. It is always good if a multimeter is to hand, at least for continuity testing. Parts required: DVD playe r box conte nts, 50cm twin 2mm cable (for extending the units’ power cable), 3x Lucar connectors (set of male and female), 2x snaplock connectors (blue which fit 1.1 ‐2.6mm cables), cable ties. Here’s the box contents of my DVD, from left to right: user manual, male‐male RCA A/V cable, female RCA to 3.5 mm jack A/V cable (for the units’ front A/V input which is a minijack – I later found out that the jack connectors are not standard: the video and right (red) poles are swapped, so you need this cable if you plan to plug in a conventional RCA input), IR re c eiver with cable, DVD player, remote, power cables, mounting brackets, screws and adhesive foam for the IR receiver. The two looms on the unit itself are the two A/V outputs (one even has an SPDIF digital audio out!!), and one A/V input with the IR sensor plug on it as well. Th e power loom has three cables: per manent positive (yellow), switched positive (red) and ground (black). I chose to feed power, as mentioned above in the GVIF section, from the left power socket by snaplocking to the purple (switched positive) and the black (negative) wires. This was actually an e x tension with female spade connectors soldered and crimped at
A www.disco3.co.uk resource Page 28 the other end, as I wanted to be able to remove the unit without having to go all the way down to the power socket. (snaplocks to power socket) (back behind the panel) (other end with female spade connectors) Note the extension also has the yellow permanent connection attached to it, the other end was fitted with a male spade connector to fit into the permanent live empty fuse slot (number F60) on the fuseblock behind the lower glovebox. I then threaded the newly made extension up next to the IH U and HVAC (fo r the red and black wires) and behind the lower glovebox into the fuseblock (for the wire with the yellow connector). (permanent positive F60) (power from the left socket) (all cables and the RCA to the GVIF) While I was at it, I threaded the A/V cable down the side of the IHU and HVAC, then pinched it under the lower end of the trim and tucked it under the centre console to the carpet joining, then carefully under the passenger seat rail and connected to the AV1 inpu t of the GVI F (this went to the second A/V output of the DVD unit). I also threaded the headrest screens’ RCA input behind the SatNav screen and through to the same area (this went to the first A/V output of the DVD unit). (headrest screens input panel) (routing carefully behind the SatNav) (out the other end for the DVD player) That’s the car prepared. Tidy up the cables with cable ties, being particularly careful not to let anything catch on the curved slider mechanism of the lower glovebox on the RHS.
A www.disco3.co.uk resource Page 29 Part III – Fitting the unit to the glovebox With the glovebox out of the car, I started by making a paper template of the tapered shape (depth ‐ wise), to properly locate the screws that would hold the bracket down (circled, looking from the opening inwards): (detail of the mounting bracket) (template for the fixing screws – from the underside of the glovebox) Then I drilled two holes where the cables would come out from inside the glovebox (I measured exactly the location by placing the unit upside ‐down from the outside): (back view of drilled holes) (view from the inside) The next thing is to fit the brackets to the unit with the supplied screws and fit the unit in the glovebox. I found however there was no way that I could tighten the screws to the glovebox even with an angled screwdriver, so I ended up using the template to dril l four little ho les at the top of the glovebox, directly over where the bracket screws would be to give a long reach screwdriver room to do its thing. By visual inspection, I figured they wouldn’t be visible from even the shortest passenger and it seems I was right!