You're right, but the one in the 68 was wired thru relays, so that if you braked while the turn signal was on, it shifted the phase of the flash, but still flashed.
It's more complicated to do that way, but if you look at how ours is wired, there's no redundancy At All.
I'd have at least left the center brakelight out of the circuit, but it's involved as well. But not tied to the flashers, as it comes out earlier.
EDIT: This is not true.
EVTM P149+ and P90+ shows the circuitry.
The Center light is only from the BOO (Brake On/Off) switch, according to the EVTM. No BOO switch, No Brakelights. It's on the brakepedal.
I must have had an intermittent fail there as well that fixed itself as I troubleshot it, as the center brakelight didn't work either.
The brake signal feeds thru the flasher module then MFS, but that is downstream from the BOO and center brakelights.
The center brakelights are in parallel, and usually melt the holders for the bulbs. You can buy lamp socket pigtails to replace them, and changing the bulb to an LED or a 3157LL will prevent future meltage.
Dang Ralph; now I have to go change the BOO switch just to make myself feel better.
I will stick with:
I check brakelight operation every time I leave in the car.
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