.......
The OEM solenoids have 3 posts, the new replacements have 4 solenoids! Now Kurt is a wizard with an Amp/Ohm meter, but he was still having a difficult time getting everything figured out. And yes we were using the maintenance manual and wiring diagrams. We were going crazy trying to get it all sorted out. But we did. ......
Was the original 3post used the mount for the ground of side of the coil. And the new 4post was isolated and required the extra post to be connected to ground???? Cause that's pretty common....these solenoids are special for airplanes lol