I've just finally gotten mine almost all sorted, I did a full set of 4 gauges.
On the hall sensor the pins are marked inside, so I wired them up as marked.
-The "+" (pin 1) on the sensor I pigtailed into pin 4 (ignition) on the gauge.
-The "-" (pin 2) on the sensor I pigtailed into the OEM gauge light ground wires which then connected into pin 3 on the gauge connector
-Pin 3 on the sensor I tied directly into pin 5 on the gauge connector
Regarding the remaining gauge pins...
-Pin 1, I did tap into the OEM harness wire that is dedicated for the gauges & horn
-Pin 2, I ran a new ground wire through the bulkhead where the speedo cable came in and crimped a ring connector on and screwed in into an empty but dedicated ground. I've read and been told that the gauges should not share power or ground. (This is why I used the dedicated fused power and created a clean ground)
-Pin 6, I used the existing gauge illumination wire (red/white), but decided I'm actually going to tie it into pin 4 so they're always on when the truck is on (the small display is impossible to read without the light on)
-Pin 7, CAN high, got pigtailed all together (all 4 gauges, not connected to any other wires)
-Pin 8, CAN low, got pigtailed all together (all 4 gauges, not connected to any other wires)
Connecting the CAN wires allows the Speedo to send commands to the other SingleViu gauges (changing light color and brightness)
Here is where it got a bit challenging (at least for me)...
I had a very hard time trying to calibrate the speedometer and this is why...
You have to connect a wire to the 12 pin on the 12 pin connector in order to access the configuration menu. I didn't have a 12 pin connector but I did have extra wire harness connectors. I crimped a wire to the connector with a male spade on the other end so I could easily and temporarily plug it into constant power on the truck (I made sure to use electrical tape on the wire connector so as not to short anything or the gauge).
Once in configuration mode and "units" set to US, you can scroll down to "Pulse". In US setting, you can not manually set the pulse, it defaults to "auto detect".
*This is where I was really loosing my mind.
You're supposed to drive 1mi, using a GPS app,
of your choosing, on your phone. Doesn't matter how fast you drive or if you have to stop at red lights (although if you're stopped too long I found it did exit "auto detect" mode and I had to start over).
Problem I had, it was way off so I tried several time and each time was a failure. I eventually got someone from VDO tech on the phone and was told that the early batches went out misprogrammed. That it required driving a km and not a mile.
So, all that being said... if you drive a mile and the calibration is way off, try starting over and driving .62 of a mile
I just ordered a 12 pin connector as I am unable to get my Speedo gauge lights to change the lights on the other gauges even though the CAN wires are correctly tied together. According to VDO tech guy, the 12 pin connector harness needs to be connected and tied into the rest of the harness for the Speedo to communicate with the other gauges.
Not all the wires are needed for this, so I'm just going to build my own harness.
12 Pin connector to 8 Pin connector
-Pin 1 to -Pin 7
-Pin 2 to -Pin 8
-Pin 12 to -Pin 1
-Pin 3 of the 12 pin connector gets jumped back into Pin 4 of the 12 pin connector with an inline 120ohm resistor
Supposedly, doing that will allow you to change the color and brightness of all the gauges. I have yet to get my new connector and resistor but trust it'll work. You can also just order the 12 pin connector with wires (VDO 2910000484300).
If you want to build your own harness here are the parts and a link to a place that has no minimums with reasonable shipping. I saved about $85 building my own harness.
Molex connectors
8 pin connector
12 pin connector
Pins
For my 300Tdi I ordered:
A2C3832870001 -Speedometer 100mm 90mph
A2C3833130001 -Fuel level 52mm
A2C3833340001 -Water temp 52mm
323-095B -Temp sender 250F
A2C3833190001 -Oil pressure 52mm
360-009B -Pressure sender
YBE100530 -Hall Effect sender
STC4637 -Harness connector
571665 -O-ring
This is the main harness I made, two connectors get pigtailed together, and the same for the other two. Then those two pigtails get pigtailed together. Was looking for the cleanest way to get all 32 wires bundled together without a rats nest.
As mentioned, still working out getting the gauges to take their marching orders from the speedo but hope to have that sorted next week.
The lighting is very good, bright and even. Really happy with the gauges and how they look in the truck. I loved the aesthetics of the OEM gauges but hated my mechanical speedo (which was in km and about 10% off on the slow side). I'm actually going to wire the illumination to the ignition power so the lights are always on when driving. The gauges are a little hard to read at a glance during the day and the digital display is near impossible to read when not illuminated (could also be my 49yo eyes).
