Well, on mine, the rear wiper is slow while cold outside, not to mention it will not work sometimes, when I completely push the rear wiper button in. When I push the rear washer button, sometimes it used to not work.
Now mine worked fine flawlessly. I like electrical work, well to a point, but I recommend getting a wiring diagram of the rear wiper and washer circuit along with the courtesy lamp circuit. Trace from the wiper motor to a power source, whether it'd be a relay, computer, whatever, and test for continuity in that circuit (with the button on of course).
Do the same for the courtest lamp cicuit, which might be a bad ground, relay, maybe a burnt out tail lamp could be the problem. I remember back when I had to figure out why my aunt's Jeep Grand Cherokee's parking lights would come on when she depressed the brakes. It was a burnt out tail light bulb. But there are many other possibilities.
Good luck figuring this one out!

__________________
Pat Albaugh, Midwest Moderator
"Diffage" -the point at which the truck's differential makes contact with the ground.
http://www.cardomain.com/id/RageRover42Visit my RRC and others here!(updated as of September 15, 2006)
1995 RRC LWB
-LT265/75R16 Pathfinder All Terrains
-RTE 2" Lift Springs
-Pro Comp ES9000 Shocks (from DAP Enterprises)
-KMC Front Diff Guard
-4 Desert Fox 55 watt Lighting
-Radio Shack CB Radio (never know when signal fails on a cell phone)
-2 Halogen Super Sport 100 watt forward lights
-Custom slim style front bumper w/ integrated bull bar
-Lowe's Special "Homemade" Snorkel
-T-Case out of an 92' RRC