New cable delivery arrived ...

As soon as I have some time, the wiring "fun" can start ...

21 September 2019

 

Design of a completely new harness ...

14 September 2019

 

As cables get brittle with the years (at least 37 years), it was clear to me, that I have to make a completely new harness. Also all the changes require additional wiring, that has to be integrated.

While I'm at it, I can also reroute some wiring to make life easier. So what were the steps?

1. The basis was the SL-harness (R107), which I laid out on a big table. EVERY single cable in there was put into an Excel-sheet, with colour, length, diametre, from where to where, etc.

2. All additional wiring was designed, e. g. the electrical fan, seat heating, etc.

3. A COMPLETE wiring diagram (colour!) was drawn with ALL cables ever being in that car. This also integrates "extras" like ABS, seat heating, cruise control, …

4. The layout in the car was designed with all nodes

So all in all it was a work of months (I don't count the hours anymore), there are 344 single cables with a total length of 547 metres …

Next step is to order the cables … ;-)

Bild in Lightbox öffnen (open image in lightbox). Automatic calculation of the required cable lengths ...
Bild in Lightbox öffnen (open image in lightbox). Pin assignment of every plug and socket ...

Electrics behind the centre console ...

9 September 2019

 

As mentioned elsewhere, most of the electrical components will be installed behind the gloves compartment. However, not all will fit there. With the new aircon unit, I do have some space behind the - modified - centre console.

So during the prototype phase, I cut a plywood plate in shape, so it a) fits behind the console and b) can be fixed with the two bars on the left and right.

I painted it black and started to fix the parts:

  • front left, the two relais for the seat heating (close to the switches)
  • front right, my electronics for the gear display, the ashtray display; it also provides +5V for the USB socket
  • back left: the control unit of the aircon unit
  • back right: my selfmade connector "58d" (originally fitted to the heater box in the R107)
Bild in Lightbox öffnen (open image in lightbox). Wooden Plate behind the centre console ...
Bild in Lightbox öffnen (open image in lightbox). Selfmade connector "58d" upside down ...
Bild in Lightbox öffnen (open image in lightbox). … here printed with the original connector clicked in ...