Brake lights and turn signal electrical issues

[Classic1965]

On my 1998 K1550 when I'm driving and my running lights are off, the brake lights work fine but sometimes so I'm told my signals will switch, but they act normally otherwise. When the running are on the turn signals act as if they have a burnt bulb with the signal going double time and the brake lights don't seem to be noticeably different. Any suggestions. This is only a few of the issues.