I have a Viair 20005 combo that has the pressure switch already mounted on the compressor.
I have the relay which calls for the following:
Wire to 12v constant: (I have a fused wire on battery)
Wire to 12v switched: (I have to underhood fuse box, switched fuse)
Wire to compressor:
Wire to pressure switch:
My question is, I have the Viair relay. But since the pressure switch is already mounted on the tank, I only have 1 wire going to the compressor/pressure switch and the relay calls for 2 separate. There’s nothing in the Viair manual about how to wire a relay in with this combo system.
I tried the wire on both contacts on the relay, but it doesn’t kick the compressor on. When I take the wire going to the compressor and touch the battery, the compressor kicks on.
Do I only need a 3 contact relay?
Thanks for the help…I didn’t realize this forum existed until today.