Rear Wiper & Fluid started while switch was off

[tracey.jenkinson]

Hi All. this is my first post. I was driving my '02 Explorer this morning for about 12 minutes when all of a sudden the rear wiper turned on and the rear fluid started spraying down. I thought maybe I had bumped the switch, but it was in the off position. It wouldn't stop. I switched it to intermittent and that would work fine, but as soon as I would switch it to off, it would come on as if I turned the knob all the way down to do the rear sprayer.

I turned the vehicle off and it sat for about 1 1/2 hours. When I came back to start it, the rear wiper and fluid started right up again, even though it was in the off position. I drove it home (so embarrassed, cuz it wasn't raining or anything out!), and pulled the fuse for now.

Any ideas? Relay switch? Motor? The cheaper the better solution, cuz finances are super tight these days.

Thank you for your anticipated help!