Tag and disconnect leads (5, figure 5-17). Remove four screws (4), lock washers (3), flat washers (2), and
permissive paralleling relay (l).
Perform removal procedure above and position permissive paralleling relay (1) on work surface.
Connect a variable AC voltage, 50-420 Hz, power oscillator across terminals 1 and 2.
Connect multimeter across terminals 5 and 6 and check for continuity. If continuity exists, leave
multimeter connected for remainder of test. If no continuity exists, replace relay.
Connect a variable AC voltage, 50-420 Hz power oscillator, across terminals 1 and 2.
Apply 120 volts AC across terminals 3 and 4.
Adjust the oscillator output for 60 Hz (AN/MJQ-37) or 400 Hz (AN/MJQ-38).
Increase the oscillator output to a value of 20 volts. Multimeter should indicate no continuity. Slowly
decrease the oscillator output until continuity is observed. Oscillator output voltage should be
Increase the oscillator output until multimeter shows no continuity. Oscillator voltage should be no
more than 1 volt above previous voltage reading.
Perform steps 6. and 7. with multimeter connected across terminals 7 and 8.
Perform installation procedure using new relay if it fails to meet the requirements of steps 6.
10. If relay meets the requirements of steps 6. through 8., perform installation procedures.
Position permissive paralleling relay (1) in switch box and install flat washer (2), lock washer (3), and
screw (4). Connect leads (5).