My problem is to get it back on!
Michael,
Mine got rear-ended last year and one of the lenses has since come loose. It appears to only have a sticky yellow gasket like substance holding it on.
What I want to know is what to use to put it back on so that it will be water and dust tight, yet able to be removed reasonably easily as you have asked to do.
Since mine is 31 years old and yours must be close to that, I would bet that Nissan used the same material on yours. You should be able to gently pry it off of the base of the lamp assembly. What to use to put it back is something I have not yet researched.
Right now I have it wedged into place with some plastic shims and I expect to find it missing after every drive down a bumpy road. Hopefully someone knows the entire drill for proper removal and reattachment.
Regards,
Dale