I don't have a Dutchstar or even a Freightliner chassis, but I'll take a wild guess that the problem has to do with a faulty ground.
The solution is quite simple and cheap. Find and clean each main grounding point. Since the warning lights go on, one could assume it isn't the main ground at the battery to the chassis, but from the chassis to your electrical control panel or similar grounding point.
The second possibility is one of more of your relays are failing. These are solenoids that are 1/2 the size of a beer can and have two large brass posts and two small brass posts sticking out. They are cheap and easy to replace. You can buy them at just about any auto parts store.
