Thanks for the replys. Sorry but I got a little lost in the thread with discussion re: trunk -

Still wondering the best way to get a look inside the rear panels to see if there is really water in there?

Can I take off trim and panels at back seat to get a look?

Thanks -

 

You can easily gain access to the quarter panel troughs by by pulling out the plastic center pins at all of the locations where they secure the 2 plastic liners in place on both sides of the inside of the trunk, and then remove the liners.
Also, check the spare wheel well for water accumulation.

 

Thanks Ski - I'll give that a look see -

Cheers -

PoppaPony

 

After leaking on the driver's side wheel well for 3 years, after 3 trips to the dealer who couldn't figure it out, and the car finally going out of warranty, I figured it out today.

The wheel well seam had a "pit" in the sealer. Finally.

 

https://lh4.googleusercontent.com/-3...s/s512/003.JPG

 

fwiw : i had small pools of water in the inside of the quarters after every heavy rain. it was a fluke i found them because the carpet in the trunk hides it. turns out there is some kind of clip that goes through the rear behind the taillights . but nothing is attached to the clip so water would trickle behind the taillights and into the trunk. i removed the clips and put silicone on them. then i sprayed the whole inside of the rear quarters in the trunk with rubberized undercoating. no problems since. mines a 2010 but probably the same design. you need to pull the carpet and plastic trim pieces in the trunk to really get a good look.

 

Just yesterday I had my 2013 Mustang checked for the same problem with water in the right quater panel. I have a convertible and it appears that leaves have gotten down inside the panel and caused the plug to clog up. They had to take the back seat out to get to the panel and clean it out. If the plug gets clogged the water will build up from rain, car washes, etc. Hope this helps.

 

Welcome and thanks for the info, lzpony!

Deysha

 

There has been a post on this problem, that works fairly easily, for me. Remove top panels at rear windows, slide, 3' x 3/8" dowel, vertically down in front of seat belt, probe around for small drain hole, and PUSH. You should see water draining immediately. First time, I tried, I didn't push very hard and fix did not work. Re 13 Mustang Convertible, and most likely other years.

 

Just bought a 2013 used Ford mustand and wouldn't you know water in passenger side quarter panel sloshing around. Dealer says they have a water specialist taking on Tuesday I will post how I make out!