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Today, I installed a flashing brake light module on the 3rd brake light (only) on my 2019 Passport Touring. The flasher was only $7.99 on Amazon [Qiorange Flash Strobe Controller Flasher Module for LED Brake Tail Stop Light] and works great, and the installation was much easier then I expected.

First, remove the interior trim panel above the rear window. Squeeze and pull gently, I did not have to pry against anything and did not break any clips.

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In the first photo you can see the green wiring harness clip hanging down. This is the wiring that powers the 3rd brake light. It was carefully disconnected using some small needle nose pliers.

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Once these wires are disconnected the spicing begins. I started by removing the tan and black wires that lead to the green connectors from the wire-loom that holds them. These wires will be tucked back into the loom when the splicing is complete. I wanted to make sure that the module could be installed and removed easily so I connected everything using "Bullet Butt" wire connectors. This way if something goes wrong with the module in the future, I can remove it and put things back to normal without getting my soldering iron back out.

Windshield Auto part Automotive exterior Automotive window part Wire

Cut the wiring with plenty of room for the splice. This way you do NOT lose the original connector to the 3rd brake light, and have enough room to tuck the wiring away later. I soldered, shrink tubed, and taped some additional wiring to both sides of the cut and added the bullet butt connectors. I used red wire to extend the positive (tan) wire and green wire on the negative (black) wire. I also made sure to use both a male and female connector on the same side of the splice so that the wiring could not be plugged in backwards.

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At this point, re-connect the green wiring harness and connect the bullet butt connectors together properly to make sure that the 3rd brake light is functioning as expected from the factory. In my example, the red wires go together, and the green wires go together. Have someone step on the brake to verify that all the connections are working properly.

The last step is to install the bullet butt connectors on the flashing light module and connect as instructed. Then just tuck the module and the wires up into the hole leading to the green harness and the job is done. I taped my flashing module down with double sided foam tape to make sure it did not rattle. Have a friend step on the brake to test it out and enjoy your success. Snap the trim back into place above the rear window, clean up your tools and grab a drink to celebrate a job well done!
 

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This should be stock on all cars. The most frequent accidents I see are rear-enders. Perhaps the distraction of the phone is too much for even this. Who knows?
 
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Answered my own question, it appears the LED third brake light is used in all trim levels.
Got this done as well, I think it could help from getting rear ended at it looks cool!
 

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I like the idea of this. May have prevented my wife getting bumped at a stop light, then the perp drove off!
I count 3 rapid, 3 short, then solid. Thought I better check the CA vehicle code before doing an install.
25251.5.(c) Any stoplamp or supplemental stoplamp required or permitted by Section 24603 may be equipped so as to flash not more than four times within the first four seconds after actuation by application of the brakes.
Technically, probably could be a violation, but I'm going to take a chance on it anyway.
 

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1985 - when the third brake light became standard, it stood out like an extra thumb. Now years down the road nobody notices it = a blinking accessory to the rescue.

1995 deviated from common sense (turn on your lights for greater visibility) by requiring daytime running lights.

I anticipate the $12K Star Trek force field (2035) for use in areas not under 5G control.
 

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Let me try to understand the mentality of some states........this products appears to prevent accidents....... naturally it is illegal?
 
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State (and Federal legislatures) are often times behind independent thinkers - always playing catch-up. Seat belts were well known long before being mandated (1969). Simultaneously human nature will soon ignore these advances.
 

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And here we are... Who would have ever thought that hand washing would be a thing? Well it's a fine mess you've gotten us into Ollie...
 

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These CHMSL flasher modules have been readily available for almost twenty years, and I have installed them on every one of my vehicles during that time. The legality question is debatable: Daughter has a MINI Cooper Clubman, the OEM CHMSL is about 32" in length but only the 12" center portion actually pulse while the outer portions 'burn' steady . . . legal in all 50 states.
State (and Federal legislatures) are often times behind independent thinkers - always playing catch-up. Seat belts were well known long before being mandated (1969). Simultaneously human nature will soon ignore these advances.
Remember well when my Dad purchased new 1966 Dodge Coronet 500, his first vehicle with seat belts, and within first couple weeks of ownership he unbolted and removed those "g**d*mn belt things" from the car 'cause they were always "in the way." Ah, the freedom we kids had to freely bounce around and be tossed about inside the car during road trips. :ROFLMAO:
 
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