Three options that I know of:
- Find and replace with another factory power antenna – which are getting a bit hard to locate nowadays.
- Find and retrofit with an aftermarket power antenna.
- Retrofit car to a non-power antenna.
Chrysler made a running change on the M-body power antennas somewhere in ’87 or ’88 (or so). The two are interchangeable if you have the correct chrome nut (on top of fender) and the chrome washer underneath it.
The antenna fender hole is the same for all years FMJ’s – but the thread size of the power antenna motor got a lot smaller. I think the wiring to/from radio is also different (which is not that hard to change out).
I have never been a fan of power antennas – even though I have changed out a good many of ‘em in my lifetime (not on my cars). I removed the power antenna from my ’86 Fifth Ave 2 years ago and installed a normal antenna in its place and have been happy.
Any FMJ with manual antenna, the cable, base, fender nut and washer will all fit - if thinking about getting rid of having power antenna.
Now with that said, if an FMJ with dealer-added radio could come with the normal antenna
OR a cheap funky antenna that isn’t worth the time to remove. Just look at the fender top. If it has a chrome castle nut and chrome washer, with a screw-on solid mast – you are golden.
If the base is black-plastic and looks round-ish (like ½ of a ball), then stay away.
Mopar antenna bezel and cap nut 74 85 3501287 3501289 | eBay is a good example of both (but not the best picture).
Both (of above parts) will work for non-power or older power antenna’s (but not the newer power). The newer one, the outside diameter of nut is the same, but the center threaded part is about ½ the size with a small hole.
BudW