1988 Johnson/Evinrude "CC" 40 thru 55 Models Service Manual, Page 311Get this manual
6Hold the tilt switch in the "down" positionThe voltmeter should show 12 volts or higherIf no reading or low reading is present on the meter, check the battery connections, fuse (0, switch and condition of the harness wires7 I the wire harness and switch test good but the pump motor is still inoperative, repair of the pump motor is indicated