SELECT TEST POINTS - Voltage to the motor can be measured anywhere between the circuit breaker and the motor terminals One convenient test point is at the output terminals of your pump's timer, shown here. This picture shows the wiring inside the timer box. Three wires come in from the left of the box. Two are labeled INPUT and one GROUND. Generally, but not always, color of the wire is significant. If the two INPUT wires are red and black, they are both load wires and provide 240VAC. If they are white and black, white is neutral and black provides 120VAC. The green wires provide GROUND. The GROUND WIRES SHOULD BE ATTACHED TO THE GROUND SCREW JUST ABOVE TERMINAL "A". IT IS WRONGLY SHOWN IN THE CURRENT PICTURE AS GOING TO "A". There are 5 terminals in the timer box. The left most is A. The other four are labeled 1 to 4. The INPUT wires are connected to 1 and 3. The OUTPUT wires to 2 and 4. The OUTPUT wires are currently wired to the pump. Note: Not all timers are wired the same. This is the terminal configuration for an Intermatic timer. Check your timer to make sure which leads are the output lines.