2003 Forest River Georgetown Electrical problems

While making a trip to myrtle beach s.C. This summer, we had the turn signals and the flashers quit working on our 2003 georgetown motorhome by forest river. We had this problem looked at in myrtle beach by a workhorse approved garage. We feel this is a real safety hazard and was told by the garage that they replace several of the turn signal units a year. Being unable to signal for lane change or turns made it very difficult to drive. We contacted workhorse and was told the motorhome is out of warranty and this is not an ongoing problem. If this is happening as often as the garage indicated, it is a real safety hazard. Would you please investigate and advise. *Tr