Ok I have 2 comps and 2 pressure switches they are viair ones with in built relay all wired correctly.
Pretty much even though I have 12v on the load wire (white) nothing can swap compressors ect still nothing.
Are they openable? Just want to see what’s inside if it’s only the relay part Maybee I can fix it.
Do have new pressure switches here but they are 1/4 npt with nonrelays.