My '76 Class "C" Winnebago (Dodge MBH 300 chassis) has developed a goofball problem that has me pulling my hair: when I turn on the lights, they all work except the tail and license-plate lights. Turn signal and hazard flashers OK. Likewise for brake lights. Backup lights...well, when the automatic tranny is in reverse, the tail lamps (not lic. plate light) come on. However, pulling the headlight switch while in reverse turns those cross-wired tail lights OFF! Oddly enough, the first time I drove this Winnie home, the lights were all A-OK. Somewhere along the line this problem appeared, probably during or after the last round trip (2011). I have a Haynes manual that covers the B-series vans; the chassis wiring for the MBH300 chop-van is the same. Everything I've checked thus far (terminals, plug-ins, etc.) matches what it's supposed to be. Aargh! Nowhere in the wiring diagrams does it appear that the main light switch crosses paths...um, circuits...with the back-ups, either (not that I'd expect such a thing). I did remove and replace the battery before this happened and did discover a place along the undercarriage where a bundle of wires got pulled down by a curious raccoon (yes, raccoon: its paw prints are in dried mud beneath the rig). Can't find any broken connections. Anyone have a similar problem. Meanwhile I'm still looking. I am certain that the wiring problem is in the cab/chassis, not the camper body.