Pneumatics Help

[Mark McLeod]

If the coil is wired backwards, then the light will go on, but the coil won't work.

[quinxorin]

If changing the direction does not work, try connecting the leads directly to a 12v battery (both directions) to make sure it works. There is a chance (very low) that the solenoid coil is fried.

The manual button is not a good indication of whether the solenoid works because, on most valves, it physically moves the solenoid, rather than with electricity.