# Rear window wiper **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** jimmy, gmc\ **Created:** [January 27, 2011, 3:11pm UTC](https://community.cartalk.com/t/rear-window-wiper/60534 "2011-01-27T15:11:03Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![JennyZ](https://avatars.discourse-cdn.com/v4/letter/j/91b2a8/32.png) [@JennyZ](https://community.cartalk.com/u/JennyZ)\ **Post date:** [January 27, 2011, 3:11pm UTC](https://community.cartalk.com/t/rear-window-wiper/60534/1 "2011-01-27T15:11:03Z")
2000 GMC Jimmy The rear window wiper doesn’t work properly. Sometimes it will go part way and then stop, or not do anything. I can hear the motor trying to move the wiper blade, but it won’t. What can be done to resolve this? The defrost works fine. ---
**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\ **Post date:** [January 27, 2011, 3:52pm UTC](https://community.cartalk.com/t/rear-window-wiper/60534/2 "2011-01-27T15:52:27Z")
Remove the wiper arm and check if the splines in the arm are striped out. If they are, it’s just a matter of replacing the wiper arm. Tester ---
**Author:** ![JennyZ](https://avatars.discourse-cdn.com/v4/letter/j/91b2a8/32.png) [@JennyZ](https://community.cartalk.com/u/JennyZ)\ **Post date:** [January 27, 2011, 5:54pm UTC](https://community.cartalk.com/t/rear-window-wiper/60534/3 "2011-01-27T17:54:49Z")
thanks. I’ll try that. but, what are splines? ---
**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\ **Post date:** [January 27, 2011, 5:59pm UTC](https://community.cartalk.com/t/rear-window-wiper/60534/4 "2011-01-27T17:59:22Z")
This is what splines look like. Tester ---
**Author:** ![JennyZ](https://avatars.discourse-cdn.com/v4/letter/j/91b2a8/32.png) [@JennyZ](https://community.cartalk.com/u/JennyZ)\ **Post date:** [January 27, 2011, 6:01pm UTC](https://community.cartalk.com/t/rear-window-wiper/60534/5 "2011-01-27T18:01:44Z")
thanks!