btBack.gif (1076 bytes)btHome.gif (1530 bytes)btffwd.gif (1784 bytes)

Electrics and wiring

Next job is all electric stuff, and the wiring loom. Most switches, lights and stuff looked to be in pretty good shape, and were tested OK. The wiring loom however was completely rotten away. Bending the wires would produce a spray of plastic bits, so it was off to the the junkyard for a better one.
So, i did find a wreck of similar age and type (a 912 seems to be simpler in its electrics). However, the wiring had the same problems that mine had: the plastic sheeting around the wires had deteriorated to such a degree that it was all but unusable.
Anyway, the connectors and fuse box were intact, so i removed everything and cut the wires away. Even the layout was gone, because most of it was patched up or removed at an earlier stage. The harvest of today: a good set of connectors, a fuse box, all relays and door switches.  Somehow the photograph doesn't do justice to the bad state everything was in, in reality it looked even worse than in the photograph.
So, nothing left to do but revert to the basics, the schematic itself. I did find a scan of it on the internet, but most of it was barely readable. So, thanks to the official  Porsche dealer in Eindhoven, who have given me excellent service throughout this project, i  got a color copy of an original, which was of very good quality considering its age. Click the image for a bigger, printable version.


Next job: wires and connectors. I basically layed out the schematic, testing switches, relays and stuff as i went along. This is actually good fun, because every part can be tested by itself, so you actually get the feeling that you are making some progress. I also found several mistakes in the schematic, if you are interested just e-mail me.
The dashboard, test-fitted to see if everything worked. It did - eventually. For a classic car, these Porsches seem to have a lot of electrical functions... Later on, i removed everything again to have the dashboard painted black. The wiring was neatly  taped together with some black insulating tape, and then a final test of all components together.
With everything connected and tested, the wiring loom was removed from the car. A few rolls of tape to hold everything in place...
And the final result looks like this. The fusebox, neatly wired and taped, with the three connectors running into the car to the dashboard.
In the engine compartment, you can see the fuel pump, voltage regulator, spark coil, etc. The loose wiring goes to the generator, but where did i leave that engine again....
So how is this for a 'before-and-after' eh? The logo on the left was what is left of the fuel pump sticker. So i re-created it in a design software, and printed it onto vinyl. The result looks better than new....
  All in all it took me about four months to get it all together. Although a lot of work, it wasn't too difficult. Electricity is actually quite logical and easy to test - one wire at a time. One suggestion for safety: never work with a battery connected, if you short-circuit anything your newly created wiring loom takes only a few seconds to go up in smoke. Use a 12V power supply instead, or replace the earth strap by a wire with a fuse.
btbttop.gif (1923 bytes)