Rear Fog Light Switch

[jaudette3]

I'm trying to get more up to speed on early fog/driving light switches. A good place to start is to gather some input on this switch.





The part no. is 902.613.623.90

Questions:

(1) Is this a switch for a rear fog light for a LWB?

(2) Would it normally have a black plastic bezel for a LWB? Is a chrome bezel correct for SWB?

(3) Can it be used as a switch for LWB fog lights?

(4) Should there be a small bulb in the bottom?

Thanks,
John

[JimmyT]

1) Several applications:

PET '70-'73 911 Fig. 9-03-05, #26) Switch, rear fog light, '72- Qty: 1
PET '74-'77 911 Fig. 9-03-05, #10 Switch for rear window heating Qty: 1
PET '74-'77 911 Fig. 9-03-05, #20 Switch for fog headlamp or rear fog light Qty: 1
PET '80-'83 911 Fig. 9-03-05, #10 Switch rear window heating, single-stage, -80 Qty: 1
PET '80-'83 911 Fig. 9-03-05, #20 Switch for fog headlamp or rear fog light, -80 Qty: 1

2) Depends on the model
3) Yes
4) Yes

[68912]

Aren’t all the 4 post on/off switches functionally the same? What do you do if the part number comes off? Wouldn’t it interchange with any other on/off switch?

That is a hazard knob, would think they would use the same tiny light stalk of the fogs, maybe in a different color for a rear fog, not the same knob as hazards

[ejboyd5]

Is that a simple on/off switch or are there two separate "on" functions depending on how far out the knob is pulled?

[jaudette3]

Just a simple 0/1.

[beh911]

Make sure you can't turn the switch a few degrees once pulled out (on).
If you can, you have the dual switch that can run front fogs and (click) turn on/off rear fog separately.
You may also benefit by doing a deeper search of the site, using a method I outlined many years ago here. Lighting switches have all sorts of precedented threads over the years.

As an aside my 69S had an NLA switch with the dual function front/rear fogs functionality, discussed here.

Pouring over the early car PET is always helpful too.

[Scott A]

That is great information, about front/rear fogs and switch location, I had never seen that.
I could feel and see there was a hole in metal, behind the basket weave, and often wondered what could/would go there.