My approach is always to consult the wiring diagram. It would seem that for the 1994 year the fuses are no longer on the relays and the pressure switch is no longer a switch but a variable output sensor. This output is evaluated by the push button controller to switch the stage 1 relay.

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Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician