One time use fender turn signals?

[HWYCRZR]

68 Polara DL. Fender mounted turn signal indicators. I wanted to change the bulbs and clean up the sockets. Problem is I am not seeing a possible way to change the bulb. I actually broke one thinking it would come apart. I have been looking at the broken one but can’t figure out how it is supposed to come apart to change the bulb. I cannot imagine that at least the bulb isn’t replaceable. My thought is that it should slide apart. Any knowledge or thoughts on this dilemma?

 

[The Captain]

It unscrews

 

[1970cat]

the knurled part is supposed to unscrew but is usually corroded solid.

 

[HWYCRZR]

That was my initial thought. It is strange to have them knurled for no reason. I have them soaking in WD40 right now. I am pretty sure I will end up with the other side breaking as well. Of all the parts in the parts manual this one did not have a pictorial breakdown. At least not this style.

 

[mcmlvii]

A little late seeing this thread, but here's a photo of my '66 turn signal in pieces. It was a bear to get them both apart and working again.

 

[HWYCRZR]

Thanks.
I left them to soak and stated tearing apart my grill. Maybe try them again tonight or tomorrow.

 

[HWYCRZR]

Got the first one loose. Man those are some fine threads.
I think I can fix it with a little clear epoxy. Now for the next one.

 

[mcmlvii]

Nice! Seems like epoxy should work fine to repair it.