CraigH

I don’t have a diagram but this is how it works.....

Stock
The outer rear light has 2 filaments. One for parking lights (that stays the same) and one that is both brake and turn signal. It is fed from a merge of the directional signal connector and the white stop light wire.
The inner rear light is fed from a single light green wire from the Reverse/Back up switch
Modified
Swap the white and light green before the directional signal connector. So the rear direction signals will be fed both on turn and reverse. The light green wire will take the brake light signal to the rear of the car.
Then change the reverse/backup bulb to yellow.
At the rear you will need to take the light green wire to both outer lights and swap the yellow and dark green wires to the inner reverse lights.

I am going from memory and a quick look at the wiring diagrams from the AIM.

Primoz

Thanks Craig.
Like this I assume:

CraigH

I can't comment on all years but for 71 Lt and DK Blue are for the front lamps.

My eyes hurt from tracing the wires on the factory manual diagrams

Try this

CraigH

About to put all the rear bumper supports back on.

Michael T*

Great thread, I just got through all 75 pages. I have restored a few Porsches over the last few years, but nothing to this level. It has been a great learning experience on most of the C3 car's systems. Thanks again.

CraigH

Thanks Michael, glad it was helpful.

CraigH

Fitted the headlight side bracket that controls the upper stop position.

There is a threaded bump stop fitted with a rubber stop that gets adjusted so that it just hits prior to full mechanism extension. That way it locks in the upward position firmly with some slight compression of the rubber.

I tested it with my vacuum pump and the lights up then click and lock into a solid position.

There is no movement once in the upper position.

Once I am 100% happy I will wind down the locking bolt on the stop.

CraigH

PainfullySlow

So pretty! I apologize if this was answered earlier...are you using all stainless steel hardware?

CraigH

I use a mixture of refurbished original fasteners and new parts. Some are stainless and others are just new steel bolts etc as I have purchased over a period of time.

As an example for the main bumper brackets front and rear originally they used a solid washer with cerations on one side to bite into the steel. That is not part of the new kits that just include large washers, so I will be mixing old and new.

I just checked the bolts in the picture and they are not stainless, just new :-)

CraigH

Rear bumper support brackets back.

CraigH

Front support brackets back.

CraigH

Prepared the fuel overflow tube with spring and installed on tank from top.

CraigH

There is something nice about having the logo fitted again....

CraigH

Rear valence on for a test fit and to work out what fasteners I need to find





Also picked up a new floor creeper with head support.

OldCarBum

Looking real nice.

CraigH

I test fitted my original rear bumpers to ensure it was all correct.
Bolted up perfectly, just slight adjustments needed.











I have purchased some new rear bars but will decide on re chroming these based on the fit for the repos.

caskiguy

Outstanding Craig !

OldCarBum

Your work is outstanding and that color is beautiful.

CraigH

Second attempt to align rear bar.

This time without rear valence etc I addjusted the two inner bar mounts so they were parallel. This brought one side of the taillight panel in slightly and moved the other side out.

This gave me a good starting point.

I also went to 1mm thick rubber on each of the bumper mounts to protect the paint (previously it was 1.5mm.





Alignment was good.











Ran the long level along and all looked good.

Test fitted the rear valence with 2 bolts to see how it then fitted.

















To get it to fit nicely I ended up opening up some of the fibreglass holes slightly to ensure bolts did not tough at all as well as elongate most of the bar holes to give me enough movement to get it all where i wanted it.

I also added some shims behind the two centre bar brackets so it sits flush on the glass with no bending pressure.

The side bolts have a 2.5" wide aluminium plate behind them to spread the load of the bolt when tightened as well.