Intermittent Wiper Not Working

While driving in the rain today, suddenly realized the intermittent feature for the windshield wipers is not working. The wipers run just fine on low and high speeds, but the intermittent is no longer working.

This is a 1996 Georgie Boy motorhome on a Chevrolet chassis.

I've started to do some research and learned there most likely is a relay that controls the intermittent feature. Any suggestions on where I might fond this relay?

Thanks in advance for reading this posting and look forward to your help...ideas...and suggestion.