I'm trying to find the house fuse box for the 120volt Nov 17, 2016I'm trying to find the house fuse box for the 120volt electrical system in a 1999 Coachmen class B motor home on a Dodge chassis. Can you be of assistance? Mechanic's Assistant: Have you checked the manual yet? Most vehicles have two fuse panels. No manual available in motorhome or found online. I found chassis fuse box but no house fuse or Amazon: 12 volt fuse box wwwon›Search›12 volt fuse boxAmazon: 12 volt fuse box. UMISKY 6-Way Fuse Box Blade Fuse Blocks with LED Warning Indicator Damp-Proof Cover for 12V/24V Automotive Car Truck Boat Marine Bus RV Van, 6 Circuit Independent Positive Negative Pactrade Marine 6 Gang Switch Panel with Illuminated Switch 20 Preprinted Labels, 6.5" L x 2.5" H x 4.5" W. 4.0 out of 5 stars 3.