Oh, geeze, believe it or don't, I spent
years chasing that elusive original-'70s-A-body-turn-signal-flasher sound. It made quite an impression on me in my grandfather's '72 Dart. I tried every flasher I could get my hands on at parts stores and in wrecking yards—nope, no luck. I put an ad in the old Slant-6 News magazine spelling out what I wanted: an original '70s A-body flasher that went "tick-BZZ! tick-BZZ! tick-BZZ!"—no luck there, either. Eventually I gave up.
Then in about 2010 I bought
this really nice '73 Dart, with few enough miles to probably have its original flasher (no, I didn't buy it just for the flasher). Turn signals went "tick-dunk, tick-dunk, tick-dunk". Not the same sound I remembered from grandpa's '72, but also not an unfamiliar sound; the very same sound from the flasher in all the '91-'92 Spirit-Acclaim-LeBaron cars I owned over the years (amplified differently by a different mount on a plastic rather than metal dashboard part). That's the sound of an ordinary Wagner thermal flasher, the kind in the round plastic can with the square nub on top. I pulled the '73's flasher: Yep, sure enough, it's original: same plastic round can, with "TUNG SOL" cast into it—a company whose vehicle lights-and-flashers business was bought by Wagner Electric in the mid '70s. The nub was different: instead of a solid plastic square about maybe 3/16" on a side (insert into square hole, twist to wedge in place, twist opposite to unwedge and remove) like the Wagner ones, it had two stubby legs bowed out in the middle to form a plastic anchor meant to be push-snapped into or pull-snapped out of the square hole.
Operated on the bench, the Tung-Sol and Wagner flashers sounded identical. I put the Wagner flasher in the Dart: "tick-dunk, tick-dunk, tick-dunk". I put the Tung-Sol flasher back in the Dart: "tick-BZZ! tick-BZZ! tick-BZZ!" The hair on the back of my neck stood on end: here was a sound I had not heard since I was a little kid.
Over the next days and weeks of hearing sometimes the one sound and sometimes the other when I would put on the signal, I figured out what was up all along: if the flasher is not quite solidly snapped into its anchor,
and its rotative position is
just so in terms of how the various parts inside are orientated with respect to gravity's pull, then you'll get that "Bzz!" sound. It's one or another internal part of the flasher vibrating when the bimetallic strip snaps, amplified many times by the metal structure of the dash. Turn the flasher a bit or snap it a little tighter into its hole, and the "Bzz!" goes away. And the volume of sound also varies quite a lot (no matter what sound it is) depending how the flasher is rotated and put in contact with the panel it's mounted to.
Wagner quit making flashers years ago; now they slap their brand on generics from China. But there's TONS of new old stock around.
Old Car Parts Northwest probably has full pallet loads of whatever old flasher you might want; which in your case is a Tung Sol or Wagner № 224 in the plastic can. Or if no luck there, there's
this.
Note the square hole in the side or rear wall of the ashtray's forward (fixed) housing behind the dash was the site of the spring steel flasher bracket on cars through whenever it was they went from metal-can to plastic-can flashers, probably '71. The plastic-can flasher eliminated the need for the bracket, as the flasher itself could just be snapped into the same square hole. One less part to make/buy/install, a penny saved per car. That bracket looks like it's for a rectangular flasher, and a rectangular flasher will fit, but the original flashers were round. The edges of the flasher bracket serve as "claws" that grab onto the outside of the round flasher can. Same for the hazard flashers. The bracket can be removed and the split-snap or twist-wedge plastic flasher installed directly into the square hole that held the bracket.
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一期一会
Too many people who were born on third base actually believe they've hit a triple.
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