Mine has the exact same problem, but only while pulling a trailer. No RH signal lights at all without a trailer.Hey guys, brand new driver and new to the group. Need some advice. Got on with the local trucking company but I don’t think their truck is safe. It has an electrical problem and I don’t want to tell dispatch because they might think I’m a complainer. When I pull my left signal light down, everything works fine. But when I pull my right signal light down, it locks up my brakes something awful. Ideas to fix? Bad wiring somewhere between my brakes and lights? Thanks in advance.