My 2008 CRV 2.2 CDTi windshield wipers work intermitently on 2008 Honda CR-V

My wipers usually dont work in the rain but sometimes works at other times. Can anyone help as Im going on a 3 hour trip and wouldnt like them to give up completely.

Asked by for the 2008 Honda CR-V
possibly could be the wiper motor going bad..
Do you know where the relay for the front wiper motor is as I think this may be sticking.