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My brake lights aren’t bright enough

Your single filament bulb is probably your reverse lights
No... 69-70 Chargers have little round lights in the rear valance for reverse lights... There are three red light sections per side, the inboard sections are strictly tail lights...
 
The 69 and 70 Chargers use a 3 bulb arrangement in each side. The left has an 1157 in the 1st and second socket and if I remember this right, a 1059 for the 3rd one. The right side starts with a 1059 then the 2nd and 3rd are 1157s.
The 1059s are single filament. They do not brighten along with the turn signals and brake lights.
To make these "Yorkim" bulbs work, I'd need a single filament for the inner sockets on both sides.

I see an 1141 can SOMETIMES interchange for 1059. You might drill into this deal or just give these a run for ten bucks. I do think they sell a few different styles of this one.

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What did you decide to do Greg @Kern Dog, clean the lenses and sockets or upgrade to LEDs?

They look pretty bright to me, though it’s not that sunny in the picture.
 
Greg.... @Kern Dog ....just please make sure that the lamps in your taillight assemblies are actually rated at 12 Volts...and not 24 Volts.

I have seen that happen where they get mixed up, and dim tail & brake lights is the result. It actually happened on my A100 when my buddy installed new lamps in without checking the packet first - he grabbed new lamps from his auto-lamp display in his shop, and they were actually 24 Volts.

I honestly don't know how it wasn't discovered on inspection. It was only when someone pointed out that the lights were dim, that I checked each lamp myself. Found the problem, changed the lamps, and they are super bright now.

This happened about 12 years ago. :)
 
That would be really strange. All that I have ever used is the 1157 and the 2057 bulbs for the center and outer sockets. I don't think that I ever questioned the voltage rating. Note the difference between the brightness of these two cars of mine:

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Both cars have the same type of bulbs. Red/Ginger has cleaner lenses and restored housings that I'm pretty sure that I painted silver in 2003.
Jigsaw sat wrecked from 1995 to 2021 and while all the wiring works, it could have lots of resistance in it. I've never had the housings out of the car. The bulbs may even be what was in the car when I got it. The brake lights show up okay in the dark...

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Now with the afternoon sun behind me...

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If anything, I'd opt for the Digitails but I'd disable the sequential function for it. I'd rather it just illuminate the way the stock system does.
As it is now, I have changed nothing. I got back from the road trip and got busy with @CoronetDarter on an engine build and install in his 68 Dart.
 
From the pictures, I think so too. It is only Randy that thought mine were ripe for improvement. I've never been outside of my car to see anyone else drive it.
 
I wonder if a previous owner tipped some sort of dye into the light housings....making the lights appear darker - like a stealth mode????

Worth taking a look.
 
I would pull your bulbs and test the circuits with a volt meter, see if your getting good ground and proper voltage. You may have a corroded connection in your harness
 
Looks like Classic Industries has rebooted an older design of LED tail lights for the 69-70 Chargers. The wiring plugs right into the tail light socket. Non sequential.

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