Near Intersection of I-35 & I-90 Southern Mn. | I'm not familiar with that harness but here are a few things to keep in mind.
Different brands and models of section valves are wired in various ways. Sometimes a company will offer what appears to be the same valve but with different wiring. Having some of each style can make for a very confusing situation.
Solenoid valves are common. They use electricity to open but rely on a spring to close. They only use two wires. They require a constant ground and a wire that goes to 12VDC when the valve should open.
Electric Ball Valves are commonly used since they are generally more reliable. With them a motor turns one direction to open the valve and the opposite direction to close it. Internally there are limit switches to limit the travel so the ball can move from fully closed to fully open but not go around in circles.
Electric Ball Valves are generally wired as two styles. It is important to know which style you have.
With ball valves, the motor needs to turn in both directions. This means that some method for reversing the polarity is needed. With some valves (Polarity Reversing) this must be done externally. Some valves handle this internally and are easier to work with.
With the Polarity reversing style, a DPDT reversing switch is needed externally or a Polarity Reversing relay can be used. This is necessary since the wiring going to the valve must has a pair of wires whose polarity reverses for open versus close. The third wire is sometimes constant hot or constant ground. This third wire is needed to allow the motor to "get going again" while a limit switch is open.
The other style does not require this external polarity swapping approach as the polarity reversing is done for you internally. This style is easier to work. It also has 3 wires. One is a constant 12V hot and another is constant ground. Thus 12V and ground are always available to run the motor. These wires are connected internally to a crisscross relay. The relay is triggered by the third wire. This relay sends +/- or -/+ to the motor to cause it to rotate in the correct direction.
Some valves even have a fourth wire. The purpose of the fourth wire varies. Sometimes it can be used to light an indicator light. Some wiring arrangement use the fourth wire for more complex switching arrangements.
Since there are many possible variations, it is imperative that you know what style of wiring is needed when investigating harness problems.
Edited by tedbear 3/31/2024 10:00
|
Raven Wiring Diagram
