First off... THANK YOU for this post. I followed your advice on replacing the solenoids because they weren't clicking. After replacing both, they still didn't click. I have power to both of them and the SOTF switch also has power but nothing happens when i turn the switch. Is it possible that the 4x4 switch is broken? Otherwise, maybe there is a wiring problem from the switch to the GEM or from the GEM to the solenoids?

Any one else have problems with this?

(Nothing at all happens when i turn the switch, no light, no click in the solenoids, no change in vacuum)

Thank you