Hole in dash next to heat controls

[montauk]

What was the hole for next to the heater controls? I'm trying to find a spot for my start/stop button. My other option would be to pull out the cigarette lighter and put it there.

[jimtweet]

On my 75 it’s for wiper speed, but what’s wrong with your key for start stop?

[SWS911]

I think it was for the rear "fog light" on the Euro cars.

[EC900]

The knock-out indentation is in the vinyl covering for the (euro) rear fog lamp switch, the diameter of the plastic locking ring, a smaller pre-drilled hole behind it to snug up the threaded switch shaft onto the metal dash frame. Good spot for a start switch or other gadget. Guess Porsche didn’t throw away old tooling for appearance sake.

Reference
Mystery Dash Switch 1980 911SC

[proporsche]

it is actually not hole at all- unless you cut it out.. .It is a place where in 1987 porsche placed the auto-heat sensor

Ivan

[montauk]

Originally Posted by jimtweet

On my 75 it’s for wiper speed, but what’s wrong with your key for start stop?

I'm converting to EFI and the ECU is also a power distribution unit. I can use it to turn on the starter solenoid so I thought I'd add a start/stop button. It works perfectly. I just need to find a spot for it. No problem turning the engine over. Getting it to start, not there yet

[montauk]

Thanks for the additional responses. I'll need to drill the metal panel to fit the switch. I was also considering replacing the cigarette lighter with the switch, but accessing it is going to be a pain. The old unused hole in the dash is accessible from inside the car.
Dave

[Winter]

I have the same indent in my ‘76 dash, and posted about it here: https://forums.pelicanparts.com/porsche-911-technical-forum/1171639-dash-instrument-question.html

Plan was to install a switch for my power antenna there, but PO of my car deleted the rear wiper, so that switch may end up for the antenna power.