Hi all have allways had amigos lit up decided to do something about it now my code reader said shuttle valve switches failure I took switch off spare mod valve off my 02 spare I tested it with ohms tester it showed good read with probes in connection when pressing each valve on switch installed it on the mod valve in truck one I took out showed no reading at all when codes deleted it showed same reading drove it off road locking up brakes ok my question is are there more codes for this mod valve or if I buy a new switch should it work did the test on the switches mean anything I have two wheel sensors need changing on front I no this is an age old problem don’t want to spend 800 on new mod valve is it common for this other complete valve be also faulty.