If it is a Ford chassis, they are under the hood, in a separate fuse box, usually near the firewall. You can find an owners manual for a Ford chassis here:
http://www.motorcraftservice.com/vdi...&menuIndex1=16
If not a Ford, post the chassis make, and the tenth digit in the VIN number, that will give the year of the chassis, which may be older than the year of the coach.
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LadyWindrider
2012 Ford F250 ext. Cab 4x4
2002 Jeep Wrangler Sahara
2008 Yamaha V-Star 650 Classic
2008 Work and Play 18LT