I'm hoping it's not the motor, but rather the switch or better yet, some fuses. The fuses can be checked without any special tools.
The FSM says that the relevant fuses to start with are:
1. 50A fusible link (letter F, located in the fuse and fusible link box).
2. 15A fuse [No.1, located in the fuse block (J/B)]
3. 10A fuse [No.21, located in the fuse block (J/B)]
Page 10 of this document will tell you exactly where to look ->
http://www.nicoclub.com/service-manual? ... M45-M35/rf