Re: NS40 problem trimming in
The relay allows a low-current (small wire) switch to control a high-current (fat wire) device (such as the pump). If you have a single-solenoid system, you should find a fat power wire going to the relay, and two fat wires to the pump. One is for UP and the other is for DOWN. If you jumper from the power wire to UP, the motor should tilt... likewise, if you jumper to the DOWN wire, the motor should lower. Keep in mind that the 40D2 has two relays. If that is your setup, you could have changed the good relay with a new one, but left the bad one untouched. Assuming your relay is good, and wired correctly, you could have a poor connection at the pump motor, or a poor crimp connection. The wiring diagram is in your Factory service manual, available from any dealer, including me.