300SDL (126.125) L6-3.0L DSL Turbo (603.961) (1987)
^
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.