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Cadillac & LaSalle Club Forums => Technical / Authenticity => Topic started by: Roger Zimmermann on August 18, 2023, 04:05:16 AM

Title: 1951 Seventy-Five: purpose of a knob
Post by: Roger Zimmermann on August 18, 2023, 04:05:16 AM
On the left side from the instrument cluster from a 1951 car, there are two knobs: the upper one is for the wipers. What is the purpose of the round knob just under the first one? Sorry the text is in German...
The owner's manual is published in the Heritage Center; both 1951 and 52 manuals are very discreet about this knob: I saw no explanation.

Schalter Armaturenbrett.pdf

Thanks for the help!
Title: Re: 1951 Seventy-Five: purpose of a knob
Post by: V63 on August 18, 2023, 10:44:10 AM
Someone will surly know this but it got my curiosity 🤣✅

The owners manual suggests two possibilities, fog lights or convertible top. See images
Title: Re: 1951 Seventy-Five: purpose of a knob
Post by: Roger Zimmermann on August 18, 2023, 11:44:59 AM
That's! As the car is a closed one, the knob can just turn but not be pulled!
The fog lamps are just under the knob for the convertible as stated in the German attachment.
Thanks for the explanation; this morning I did not see the page for the convertible operation.
Title: Re: 1951 Seventy-Five: purpose of a knob
Post by: V63 on August 18, 2023, 12:58:06 PM
Well what ever it is ...convertibles don't have it 🤣✅
Title: Re: 1951 Seventy-Five: purpose of a knob
Post by: Alan Harris CLC#1513 on August 19, 2023, 12:00:25 AM
Many years ago, I had a 1951 Series 62 convertible. That knob was for the power top. On a Series 75, I would bet that it is for the divider window.
Title: Re: 1951 Seventy-Five: purpose of a knob
Post by: Roger Zimmermann on August 19, 2023, 03:27:24 AM
Quote from: Alan Harris CLC#1513 on August 19, 2023, 12:00:25 AMMany years ago, I had a 1951 Series 62 convertible. That knob was for the power top. On a Series 75, I would bet that it is for the divider window.
Thanks Alan. I had also that idea, but I'm not sure if the driver has the possibility to open or raise that divider window. I'll ask the man who wanted to know the purpose from that knob.
Title: Re: 1951 Seventy-Five: purpose of a knob
Post by: V63 on August 19, 2023, 09:17:51 AM
I echo that i would not anticipate the driver would have control of the division.

Best to see what's 'behind' the switch? Wires? Or cable or vacuum hoses? Or nothing?!Maybe it's a dummy filler knob?
Title: Re: 1951 Seventy-Five: purpose of a knob
Post by: Roger Zimmermann on August 19, 2023, 09:29:27 AM
That would be also my first step. However, some people prefer to ask first! On the other side, I don't know if it's easy to see what's attached to the knob...
Title: Re: 1951 Seventy-Five: purpose of a knob
Post by: V63 on August 19, 2023, 11:58:16 AM
You would probably need to stand on your head but it's not that encapsulated otherwise
Title: Re: 1951 Seventy-Five: purpose of a knob
Post by: Jay Friedman on August 19, 2023, 01:24:21 PM
My guess--and I emphasize it is a guess because I don't own a '51--is that it is for the fog lamps.  My reason is that on my '49 a similar knob has that function. 
Title: Re: 1951 Seventy-Five: purpose of a knob
Post by: Roger Zimmermann on August 19, 2023, 01:32:14 PM
Jay, no, the knob for the fog lamp is under that mysterious knob. I gave your thoughts to the owner, up to now he is silent...
Title: Re: 1951 Seventy-Five: purpose of a knob
Post by: The Tassie Devil(le) on August 19, 2023, 08:30:20 PM
Quote from: V63 on August 19, 2023, 11:58:16 AMYou would probably need to stand on your head but it's not that encapsulated otherwise
No need to stand on ones' head.   Deftly position a mirror and look in comfort.

Bruce. >:D
Title: Re: 1951 Seventy-Five: purpose of a knob
Post by: Roger Zimmermann on August 23, 2023, 04:28:51 AM
Strange people sometimes...The man who asked me about the purpose of the knob found the answer from his documentation: it's to fade the radio in the back.