Anyone know what these are on the engine electrical panel?

[psychoideas]

Hello All,

First off, what is this 3 pin flat black plug normally used for?

Second, what are the components on the mounting plate?
I'm good with the fuses. I'm pretty sure that the cylindrical relay is for the cold start and the big square aluminium one is the rear window defrost.
But what are the other two?
Cheers,
Frank.

1976 911S with CIS

[strictly]

rear window heater i am thinking, but that is from memory, I can have a peek tomorrow.

[thor66]

'76 may have a thermo-time switch and relay for the CIS

[timmy2]

3 pin is actually only a 2 pin and a center guide, for the Rear window heater grid.
The 2 pieces on top with 3 prong plugs are the remote voltage regulator and noise suppression.
The square silver box is the 2 stage relay for the window heater.
The round relay is for the engine blower fan.

[psychoideas]

Originally Posted by timmy2

3 pin is actually only a 2 pin and a center guide, for the Rear window heater grid.
The 2 pieces on top with 3 prong plugs are the remote voltage regulator and noise suppression.
The square silver box is the 2 stage relay for the window heater.
The round relay is for the engine blower fan.

Awesome, thank you timmy2.
Well the rear window I think has never been plugged in as long as I've had it.
I'm going to add a mounting plate to install an MSD 6al.

Thanks to those that responded. 👍

Regards,
Frank