69 911E RPM transducer and rear fuse box wiring ?

[SFE]

Hi all,

I'm trying to make my "stop shut off solenoid" working because I have some backfiring during deceleration and I have some questions about the wiring (car is a 1969 2.0 liters).

Here is what I found in my rear fuse box :



On the picture there is the "other blue yellow wire not connected", this wire is coming from the RPM transducer and it should be connected to the rear fuse box on a non permanent 12V if I'm correct.

So I disconnected the black wire that seems to go to the front of the car (rear window defrost ???) and I connected this other blue yellow wire as shown on the picture below :



Then I started the engine , put 3000 RPM and push the micro-switch : rpm dropped immediately
I try a second time.....no RPM drop anymore

So it worked just one time

Do you confirm the wiring I did is OK ?
What happened, the RPM transducer failed ?

[SFE]

Anyone who have a 2.0 liters MFI 911E who could send me a picture of his rear fuse box connections ?

It would be great

[werinhari]

Hi,

I was just looking for some other stuff, that I couldn't find any hint on in our German forums when I fell over your thread.
Maybe the attached diagram will help you a little.
I recommend looking for more details about function and testing of the RPM transducer before experimenting any more!

Beste, Wolfgang

wiring-diagram-69-911.pdf

[SFE]

Hi,

I was just looking for some other stuff, that I couldn't find any hint on in our German forums when I fell over your thread.
Maybe the attached diagram will help you a little.
I recommend looking for more details about function and testing of the RPM transducer before experimenting any more!

Beste, Wolfgang

wiring-diagram-69-911.pdf

Thanks Wolfgang,
It is the wiring diagram I'm using.
But as you can see there is 4 fuses on it and I have only a 3 fuses configuration.

[Emmcee]

This is what I’ve got

[SFE]

This is what I’ve got

Interesting, thanks !

And your RPM transducer is working ?

[Emmcee]

Interesting, thanks !

And your RPM transducer is working ?

As far as I can tell. No backfiring or idling issues, have never had a reason to do any diagnostics on it.

[SIMI BOB]

My relatively untouched '69S (1070) looks exactly like Emmcee's picture.
Bob B

[SFE]

Ok thanks.

I don't have the red/black wire and that makes sense because my rear window heating is KO.

What I see is both blue/yellow wires are connected together on a non permanent 12V spot.

[tonyiad]

Here's a photo from my 69 911E. I've got a working micro switch and I think the RPM transducer is good too but, as for the rpm dropping immediately, I can't say it does.
Attachment 597901