Author Topic: Back up light lens question  (Read 86 times)

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Offline musclecar_fan

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Back up light lens question
« on: May 23, 2020, 02:32:45 pm »
I have 2 rear back up lenses with the same 69 part number But one is 1/4 inch thick and the other is 3/4 inch thick.  If I use the 1/4 inch thick one it will be inset when mounted in the chrome housing. The other 3/4 inch one will sit flat with the edge of the housing. Which is correct for a 69 Boss 9?  Thanks

Offline AlexM

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Re: Back up light lens question
« Reply #1 on: May 23, 2020, 06:47:28 pm »
My car has them flush, KK1982 June 24th '69
--Alex
1969 Mach 1
1970 BOSS 302 0F02G120146
1970 BOSS 302 0F02G119233 W code
1969 BOSS 302 9F02G196425
1969 BOSS 429 9F02Z198888 KK 1982

Offline flyingfred

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Re: Back up light lens question
« Reply #2 on: May 23, 2020, 08:15:48 pm »
I have found original backup light assemblies with two thin lenses installed to make them almost flush with the lamp body. I have the NOS thick versions which, from what I can tell, replaced the two thinner versions.

-Fred-

Offline Idylboss

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Re: Back up light lens question
« Reply #3 on: May 23, 2020, 10:02:41 pm »
My Feb. 26th car has the single 1/4" lens.   Marcus Anghel has a great factoid on this subject:
"The most unusual running change during the 1969 model year was in the reverse lamp lens and how they were installed. As with previous years a single thin lens was used with the housing. It seems that there was possibly an issue with moisture and debris getting caught in the housing so Ford started stacking the lens and used two lenses on top of each other to create a thicker surface. This then eventually changed to three stacked lenses until beginning of April 1969."
http://anghelrestorations.com/uploads/3/5/1/2/35122002/back_up_lights_v1.1.pdf
« Last Edit: May 24, 2020, 07:09:10 am by Jeff »
Marc
boss429sd@yahoo.com