International Lonestar Dump Switch Not Working

Hi there, I recently started experiencing problems with my dump switch.

Solenoid and the module had corrosion on the terminals, so I went ahead and replaced both air suspension solenoids and the module.

However, there is a green blinking light on the dump switch. When I put the switch into dump position it does not dump air. Air bags stay inflated. There is definitely voltage going to the circuit, as my air horn is working fine and it’s on the same module.

Module has a 4 pin plug that connects to it to give it power. There was no voltage coming in through two of the pins.

I checked the other module and the plug pm that had voltage coming to all 4 pins.

please advise if I am on the right track and advise incase I may have missed something else.

any help would be much appreciated.

thank you