For the last month, EAS has been having intermittent faults which has disabled suspension until the system would magically reset. The faults would occur for no reason, at any speed, on any ground (level, un-level, etc) and was completely random. The truck could be working fine, at any height, then be locked at that height for hours.
I was able to diagnose the issue and determined that the delay relay (PN: AMR 1111) was hosed. If I flicked it while the system was in fault-mode, EAS would restart and continue to work as normal. I ended up sourcing a replacement relay which has solved all issues to date.
Looking at the insides of the bad relay, it looks as if the mini-relay (PN: V23072-C1061-A303) is bad and the cause of all problems. Allied Electronics sells these mini-relays and with some careful soldering, it looks that this part is serviceable. Looking to the future, should my RRC eat another relay I'd rather be able to fix it rather then source the part or order the brand new one.
Has anyone ever tried to fix these? Did it work afterwards?