Nartron eess manual switch

[Dcmock]

So I modified my eess box with a manual switch and solenoid, when I push the button I get 24v to the glow plugs but when I let off it still has 19v going ro the glow plugs, unless I switch the main switch off then it goes to nothing, anyone have a schematic to make sure I wited it right

 

[TOBASH]

Schematics in my signature line.