I just took my 63 Coupe de Ville out of storage.  While walking around the car with the lights on, I noticed that the left taillight is much dimmer than the right side.  What could be the cause of this?  I was also looking into replacing the standard 1157 bulbs to brighter LED ones.  From what I understand, a load resistor would have to be installed.  Do I need this, and if so, where would I wire it into?  I have tried to polish and brighten up the inside of the taillight housing as Jason had previously suggested to me, but the brake light/turn signals still seem awfully dim, especially during daylight hours.  I am on a tight budget this summer, so any suggestions to keep costs at a minimum would be very much appreciated.

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The interior lens's may be dirty. A poor ground will keep a bulb dim.

So where would I find the ground to check it?

The socket is grounded to the housing. The socket can be loose in the housing, or the housing could be loose in the bumper end.

The socket is crimped into the housing, and I fix that by using a punch or chisel to stake the ends back to the housing.

Always clean the grounds when ever starting to solve an electrical problem
More often than not it will fix the problem
Gound connections need to be cleaned after many years of use to conduct power as they SB


My lights were dim too.  I removed the lenses and the horizontal pieces were covered with dust.  I have now replace the seals.  I got new ones from McVey's.  The lights are much brighter now. 

I too want LEDs.  I bought them from BrightLED.com, but their design prevented me from pushing them in far enough to twist them into place, so I sent them back.  You do not need a resistor if you install an electronic flasher, which you can buy from brightled.com or probably any auto parts store.

If anyone has successfully installed LEDs into their taillight, I would like to know from whom you bought them.


I sell a LED light assembly for the 63. It makes the tail light and brake lights super bright. These are professionally made by Lambert Enterprises.  

You can see them on my web site www.1963caddyshack.com   They are 250.00



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