2001 Dodge Caravan Windshield washer fluid comes out withou

I have a 2001 Dodge Caravan and for no reason at all the windshield washer pump came on and started pumping all the liquid out of the tank until the low fluid light came on. Thinking I had a short in the multi-function swith I replaced it but on the way to work the motor started for a few seconds but did not stay on. This happens randomly for a few seconds at a time maybe twice in a 30 mile drive. The windshideld wipers work perfectly as does the rear wipers and fluid switch. Could the fluid pump motor be shorting out or do I have larger electrical module problems. my next thing to do is pull out the pump motor and inspect wires. Help