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Discussion Starter #1 (Edited)
This is a fix for the JK's
A hole in the bottom of the jeep will shoot mud up and behind both of the rear tail lights.

First remove the tail lights The 2 screws only on the right side of the left light and the left side of the right light. Then clean out the cavity well! Remove the foam block from both holes.

Left side out.

Right side out.
Next you see the hole on each side.

Left side hole.

Right rear hole.
Then place a piece of rubber over the holes.

Next fill with Marine low expansion foam.

Left side full up to the tag wires and don't get any on the gas breather.

Right side about half way up.

Let cure, reconnect wires to lights and screw back in..
Done!

Left rear done!

Right rear done!
Now no more mud or stuff will go up into the holes and rot out behind your tail lights..
I got the marine low expansion foam from a boat repair house. It is made to breath and will not let water stay in but keep dirt out!

UP dated for 2011 & up
On the passenger side it is all sealed up no more foam pad. Under shot.

Inside shot.


Drill a 5/8" hole from the bottom up. I had to remove the tire to get in to the spot to drill.


Feed hose in and up with no cap on.


Loop the hose in side well and put cap on and secure up with wire tie.
Add foam.

Finish running hose to rear diff. Don't forget to check for clearance with axle and spring, wire ties in and your done.
 

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I applaud...

...your can do attitude...improvise, adapt, and overcome, but I am not so sure that sealing up that "hole" is wise...I am sure that the tail light assembly is anything but waterproof, and now what I think you have is a closed space that is ripe for collection of water...hence...rust, or worse. I believe those "holes" are their for a reason, and perhaps a modification of your adaptation with, say, small drain holes, may improve your design...just my dos centavos.:)
 

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Discussion Starter #3

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Sweet! this weekends project has been determined! Thanks for the great write up. :beer: For you.
 

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Did any of you guys have a foam flooring covering that hole? I looked at mine and there was a foam piece stuck in there to block water/mud from traveling up and in.
 

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Did any of you guys have a foam flooring covering that hole? I looked at mine and there was a foam piece stuck in there to block water/mud from traveling up and in.
They all come with the foam covering... Just don't work very well...
 

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hmm maybe I should have a look in that hole, heck if I do I better take a pic, I'm sure its got some mud in there :laughing:
or a fish
 

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hmm maybe I should have a look in that hole, heck if I do I better take a pic, I'm sure its got some mud in there :laughing:

Judging from your profile pic, the mud mighta gotten washed out!!:beer:
 

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Having just installed some trailer wiring on my 2009 unlimited, I noticed the open (well, light foam protected) spot behind the lights.

Has anyone seen any problem with mud/snow/salt (gets very slushy/salty on the roads up here in winter) and corrosion? If not sealing the location off, probably a good idea to pop the lights off and give it a good cleaning/rinse from time to time?

Grant
 

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What kind of foam did you use? I called the boat shops around here and none of them had anything. Also, will gap foam for houses work the same? They have some that is fire resistant.
 

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Discussion Starter #13
What kind of foam did you use? I called the boat shops around here and none of them had anything. Also, will gap foam for houses work the same? They have some that is fire resistant.
As of today it is still working great!
I used Marine low expansion foam Don't use the junk from Home Depo it is not the same..
 
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