Ventilation Controls

[Paul W]

I want to remove the ventilation controls in the dash to fix a minor electrical gremlin (won’t go to 3 speed setting) and potentially refub the fascia. Can anyone who has done this shed any light? Searched Pelican / Early S but there is nothing there relevant to an early car and can’t find any reference in my set of shop manuals.

Also – are the red and blue squares supposed to illuminate – from what I can make out it looks like there is the provision for bulbs in the back of the panel (from what I can see.

Any help would be most appreciated.

TIA

[Paul W]

Got it! Who would have thought for the first time ever I wasn’t using enough force – just needed some ‘persuasion’ to pop out.

[HughH]

I
Also – are the red and blue squares supposed to illuminate – from what I can make out it looks like there is the provision for bulbs in the back of the panel (from what I can see.

paul

My Blue one has a globe and does illuminatewhen the fan is on. Maybe the lights have t be on as well but I cant remember
the red one did not have a globe in it or wires to connect to it when i last had it apart (about 5 years ago) I wondered then as well and would be interested to hear the answer

[Paul W]

Hi Hugh

Mine looks like it only has the provision (ie wiring) for one globe. Might put the multimeter on it and see if like yours it is triggered by the fan switch.

[Terminator]

Paul,

It is and they aften fail and yes you should only have a globe for the blue light which is supposed to come on once the fan is activated on one of its three speeds.

Fun part is geeting the wires reconnected in the correct spot so that the levers work correctly and air goes where it should and the levers move from one side to the other.

[Paul W]

For those who have undertaken this little project, can the facia plate be replaced or does the whole unit need to go.

Cheers

[Paul W]

Fixed the electrical issues - nothing that a dremel with a wire brush fitting couldn’t handle. The mechanicals are pristine just the fascia’s that is a little shabby so I’ll have to work out what to do. I have one light globe holder wired into the loom and according to my multimeter it comes on when the fan is on.

Couple of questions…
Does anyone know where I can get a bulb to fit this holder; it’s an odd size?

Secondly can anyone shed ay light on the function of the wire below? Can’t make it out on the wiring diagram and it’s coloured brown with a white stripe.

Cheers

[gulf908]

Paul,

I believe that the red indicator is to show if the gas heater is on.
Irrelevant therefore for RHD cars.

Cheers,
Dennis.

[Paul W]

Dennis, that makes sense.

[Terminator]

Porsche sell the bulbs Paul

[Terminator]

Paul if you mean the chrome yes it can be replaced if you mean the black I am not sure but don't think so from my previous experience.

I have a nice chrome surround if your stuck

[Paul W]

Hi Clyde,

Chrome surround is perfect - just the black portion which is tired. Have aPorscheaprt looking for a replacement for me.

Any idea what the mystery wire is from?

How did you go with your dash speaker grill?

[911ex2]

Paul the brown cable/white trace(br/wh) looks to be the switched +ve that goes to to the glove compartment light,after activation of the glove compartment switch ,as per my 69 wiring diagram,fault finding and wiring issues dont you just love the challenge.#*@$% Graham

[Paul W]

Hi Graham, thanks for the feedback. Are you referring to the door switch trigger for this light?

You’re right there can be a world of frustration trying to trouble shoot electrics on older cars though luckily the wiring on mine is reasonably unmolested, save the loom for the radio installed by the PO.

[911ex2]

yes Paul , the glove box door