The short bracket is correct for a 1940.This places the lamp below the accessory grille guard rail so it does not split the beam.There is no mention of two different brackets in the 1940 parts book...and many you see are the taller style.Was there a change during the model year???
The film strips show only the short bracket.
In the last month or two there were two 1940's pictured on the cover of the G&D.The car with the conventional amber fog lamps had the correct brackets.The other car had a GM Guide passing lamp, a much larger lamp and came with the tall bracket only.
The 1937-40 lamps are all of the same demension...the rim from a 1937 will fit a 1939 or the rim and lens from a 1940 can be installed on a 1939 lamp to make it look like a 1940.The only problem is the pointed shell (see below) 1937-39 lamps may not fit in the shallow space between the grille and guard rail of a 1940.
All Chevrolet Guide fog lamps from 1937 thru 1952 had silver brackets.My '39's are good original and look almost like aluminum paint was sprayed on.Same for the ones on my '50.
They 1942 lamps had a chrome rim but the rear of the housing was painted gray...if they were black out lights they would have been all painted.
There is a mystery to the 1939 fog lamps.Some have a pointed back on the housing like a 1937-38 lamp and some are rounded back like a 1940.Did they change shape in mid-year???
Chevrolet also offered a Unity brand fog lamp from 1937-40.They were slightly smaller than the Guide(Guide was a Division of GM-Unity was not)...The lamps are mentioned in the parts book but not in the 1937-40 accessory books.I originally had a set on my '39 but traded them for a set of Guides.The Unity had a flat round lens-not like the pointed creased '39 lens or the 1940 lens with the flat upper part.
Also some of the 1937-39 Guide lamps have a double filament head lamp bulb with the wire snipped to one filament (low beam) and some do not.I use the snipped wire for the directionals in my '39 and still have the other filament for the fog lamps.With both the head lamps and fog lamps on the road illumination is fairly good.I am not sure as to how the 1940's were wired.
Bob-One time when black isn't right
