300E (124.030) L6-3.0L (103.983) (1986)
^
Pressure regulator
^
Four-circuit protection valve
^
Trailer control valve
^
Gauges
^
Air horn (if applicable)
10.
Make any necessary corrections then retest.
^
Pressure regulator
^
Four-circuit protection valve
^
Trailer control valve
^
Gauges
^
Air horn (if applicable)
10.
Make any necessary corrections then retest.