ested the Prius pump that will be used to circulate cooling fluid through the turbocharger after shutdown.
Used a Toyota turn signal connecter obtained here (
https://www.amazon.com/Connector-2-way-Toyota-Signal-90980-11162/dp/B01E3C6YS2) to power the pump.
Initial connection to a motocycle battery that had been on a solar trickle charger found that the pump would not turn. Placing the pump in a dog's water bowl proved unsatisfactory, with a surge of water every second or so.
With a voltmeter across the battery, it was determined that a meager 11 volts was supplied to the pump. Placed a charger across the battery for an hour and a half, until an indicated 12 volts on the meter. Second wet test in a plastic container proved a good flow through the pump. Good water-tight connection at the turn signal power fitting.
As a side note, this pump - ordered as suggested from the Sonex part list, requires 5/8" diameter silicone tubing to properly fit the pump ports. The 1/2" tubing specified by Sonex will not fit the inlet ports of this pump.