Found it, thanks in part to very nice folks at Newmar and Freightliner customer support. The gal at Newmar quickly transferred me to FL - and stayed on the line to make sure I got an answer! The FL rep found a part #, and suggested the relay was either under the dash or a "front LH compartment." Since I did not have a matching compartment I checked the front compartment over the genny. There is a box there with wiring harness and fuses for the genny and assorted stuff, as well as the turn signal and emergency flasher. Go figure. So, off to NAPA for a replacement. Kudos to Newmar and FL for their prompt and courteous support.