914-6 Wiring

[gms]

Here is a copy of my engine wiring harness diagram, note this is for a European car.

[gms]

Here is a 1971 914-4 diagram that can be helpful with a 914-6 except in the engine and ignition areas.

[gms]

This is a copy of what I believe to be the factory version with someones corrections

[Dave_Darling]

This is a copy of what I believe to be the factory version with someones corrections

That diagram is on the Net in a number of places. Pelican, for one, and in some "914 on-line manuals" places (and CDs that were at one point available on evil-bay). No idea what the original source for them was.

--DD

[gms]

the connector that plugs into the ignition switch

[Richard Casto]

Some day when I have nothing else to do, I am going to make SVG (Scalable Vector Graphic) versions of those diagrams. Then they should be easier to view as well as print out. I know that someone else has redone them and is selling printed copies.

Semi-related question... What is the general availability of some of the plastic connectors for the wiring? An example being the little plastic block that holds the three headlight wires. This block is what the headlight itself plugs into. Another example is the rubber boot that covers the harness from where it exits out into the engine compartment.

I ask as I am just about to pull the wiring harness out of my car and some of the associated items are damaged or missing. Just curious how much of this is NLA. Or it is available, but very expensive.

[DEC]

Do you need a colored 914-6 wiring diagram??
Please PM me I have it as a file but it is to great for post it here in a
useable quality

[gms]

Here is the 914/6 Wire Diagram from DEC
thanks Wilco!

[smontanaro]

Here it is in four pieces. Should fit nicely on four 8.5x11 pages.

[red-beard]

How does this compare to the Art Zaph diagram?

http://66.236.61.177/showthread.php?s=&threadid=78526&highlight=wiring

[Dave_Darling]

Check the corner of the image, James. It is the Zapf diagram.

--DD

[dug]

I've been trying to figure out what the two unique 914-6 relay board items do in an effort to determine what I will need when assembling my 914-6. I have an original relay board (2 actually) and an engine wiring harness, but no relays.

In the Zapf diagram, the cylindrical one is listed as #37 Primary Control Unit, and is connected to ground, the tachometer, and the coil. It is probably only a capacitor or coil to isolate and/or convert the voltage from the coil to the tach. This can supposedly be eliminated with a 71 or later tach, or simply during a rebuild of the tachometer. But the pins would have to be jumpered on the relay board, or the relay board eliminated.

The other rectangular unit goes just to left of it on the relay board, but has no number on the Zapf diagram. On the black and white diagram Glenn posted, it is labelled 44, but there is no legend in that diagram, and 44 (and 45) is curiously missing from the Zapf legend. The missing 44 appears to be connected to ground, the distributor points, and #8 Dash Pot Throttle Positioner. So I deduce that this controls only the operation of the Dash Pot Throttle Positioner, which I have never seen on a running 914-6. This should be eliminated entirely with no effect on the car at all.

The two standard round relays on the relay board are also not necessary on a conversion, or upgraded non-stock car. 54 in the Zapf diagram is the optional rear-window heater, obviously unnecessary if you don't have one. The other, 51 is connected to the Power fuse, 10 Cold Start Valve, 41 Thermotime switch, and ignition switch via the pin with the yellow wire that is jumpered to both upper and lower multi-pin connectors. So I believe this relay is only necessary if you have a cold start valve and want it to run. Again, I've never seen this one in use.

Obviously if you have a concourse car, you want all of these things to be original. But on a six like mine that will have a 3.2 engine, I believe that I will be able to eliminate all of the relay board items, by using an alternator with a built in regulator, and a tach with post 71 style internal circuit.

I have seen photos of 914-6s with the two multi-pin connectors mated directly accomplishing this.

If anyone can confirm my interpretation, it would be most welcome. When I do get the car wired up I will post my complete solution with photos and pinouts.

thanks!
dug

[Straub]

This is a copy of what I believe to be the factory version with someones corrections

A better and bigger copy of the original plan
Legend with the original names in German.
_____________
Klaus Straub

[dug]

44 is missing from this plan too.

[Straub]

45 is missing from this plan too.

If 45 complain, then I think that you have this with a 914/4, 1974 confused.
In the plan of 1970 is at 914/6 No. 47!
You should harness your originality to examine.
Or do you want to say Porsche plans would have created false?
_______________
Klaus Straub

[dug]

this has nothing to do with a 74. I am speaking about the four pins on the 914-6 relay board that are not named to the left of 37 on this plan or the zapf plan, but they do have a label in the plan with handwritten corrections - in german - post #3 in this thread. This part on the relay board is the rectangular relay unique to the 914-6, not on a 914-4. What is the name of this part and why is it not listed in the legend?

cheers, dug

[Straub]

this has nothing to do with a 74. I am speaking about the four pins on the 914-6 relay board that are not named to the left of 37 on this plan or the zapf plan, but they do have a label in the plan with handwritten corrections - in german - post #3 in this thread. This part on the relay board is the rectangular relay unique to the 914-6, not on a 914-4. What is the name of this part and why is it not listed in the legend?

cheers, dug

You have the possibility the area you are in my plan to draw -
too Mark so I understand what you want?
Send me then ask the file with the marked points in my e-mail address.
______________
Klaus Straub

[dug]

I've put a red rectangle around the pins on the plan. Thanks for looking.

dug

[DEC]

Hi Dug,
37 is the Vorschaltgerät (Preconverter) for early tachometer (RPM)
without internal electronic to generate a clear signal .
You can find it in the 911 F-Model also.

Wilco

P.S. in German:
Speedometer = Tachometer (mph/kmh)
Tachometer = Drehzahlmesser (rpm/Umin)

[DEC]

Dug,
late but not to late I see what you mean. ;)

Follow the pin 8

The wire goes to the Schaltgerät (36/ converter) but the converter is not
an external part like the diagram.

It is on the board too and works in cooperation with the preconverter.

Wilco

[dug]

I do not think that is what is connected to the pins I outlined.
The rectangular thing at the top of this picture is what I am referring to.
http://www.pbase.com/9146gt/image/27679809

It is connected to #8 the "Dash pot throttle positioner" in the Zapf plan.
It is not connected to anything in the german pdf and #8 is not in the legend.

Does anyone have a "Dash pot throttle positioner in their 914-6?
Is this a USA only part?

thanks,
dug

[Straub]

I've put a red rectangle around the pins on the plan. Thanks for looking.

dug

This relay socket is power supply unit (ballast) for the revolution counter (tachometer).
To 1971, were also 911er tachometer installed a ballast need.
From model year was equal to 1972, the tachometer has been changed.
The ballasts are not there more.
However repairs led DZM offered in both systems.
____________
Klaus Straub

[Straub]

This relay socket is power supply unit (ballast) for the revolution counter (tachometer).
To 1971, were also 911er tachometer installed a ballast need.
From model year was equal to 1972, the tachometer has been changed.
The ballasts are not there more.
However repairs led DZM offered in both systems.
____________
Klaus Straub

The corresponding page from the Service Book