Just putting this out as an FYI.
Our toad is an 05 Jeep Liberty and it has an intermittent but frequent problem of the passenger side brake light bulb burning out. After much electrical troubleshooting to no avail, while replacing the bulb for the umpteenth time today I discovered the cause. Inside the brake/turn/tail light assembly each bulb sits in its own little chamber and in the chamber there are reflector/refractor lenses that clip into place between the bulbs and the light assembly. The refector/refractor lens for the brake light has come loose and can be bumped into a position allowing it to make contact with the bulb which causes the bulb to overheat and crack. I had suspected rain was entering the light assembly and causing the bulbs to crack but today I noticed a small melt point on the loose lens. I have now glued the lens in place with Gorilla glue and should not have a repeat of this problem.
Just thought others may have a similar issue...I hope this helps others.