[Mark McLeod]

Programming:

• Make sure the solenoid module LEDs show one side of the solenoid to be off while the opposing side of the solenoid is on and vice versa.
• If the solenoid module LEDs are alternating and changing as you expect, then the code is doing all it can.

Electrical:

• Verify that the solenoid breakout power LED is on.
• Verify with a multi-meter that each side of the solenoid is receiving 12v when the module LEDs signal that it should be.
• Verify with your meter that when one solenoid coil is energized that the opposite coil is not.
• Make sure both solenoid side yellow indicators are not on at the same time. One should be on while the other is off.
• The solenoid coils might be wired backwards, so use the meter to verify that the polarity is correct.