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For the washer pump, if you can get to the leads at the pump itself, a simple meter should indicate if it's receiving a voltage upon application. If it is and the motor is definitely not operating at all, then you need a replacement. But if there is a voltage, it's more likely is that the motor is operating and you're not maintaining a vacuum seal for the pumping action. Obviously if you're not getting a voltage at the motor on application, you have a wiring break or a switch malfunction to track down.
The grounding issue is a lot thornier and will probably need someone at least local enough to get eyes on, regardless of general knowledge. About the only thing you can feasibly tackle yourself is a visual inspection of as much of the wiring as you can reasonably access, obviously starting at the battery. Look for bad connections, loose wirings, chafing, stripped insulation, pinches, and the like. It could be as simple as bad grounding at the terminals, easily enough remedied, but no way to promise without eyes-on.
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