TM 9-2330-381-14
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
HYDRAULIC SYSTEM - CONT
b. Using an ohm meter, connect leads to poles of pressure switch PS6. Reading on meter should
be infinity (open). Check operation of pressure switch PS6 by slightly opening forward bleed
valve on curbside platform cylinder. Allow only residual pressure to be bled from cylinder. Once
pressure is relieved from cylinder, close bleed valve and check indicator light. Indicator light
should be lit and ohm reading should be zero (closed). If indicator light is not lit or ohm reading is
not zero, replace pressure switch PS6 (para. 4-78).
c.
Using an ohm meter, connect leads to poles of pressure switch PS7. Reading on meter should
be infinity (open). Check operation of pressure switch PS7 by slightly opening forward bleed
valve on streetside platform cylinder. Allow only residual pressure to be bled from cylinder. Once
pressure is relieved from cylinder, close bleed valve and check indicator light. Indicator light
should be lit and ohm reading should be zero (closed). If indicator light is not lit or ohm reading is
not zero, replace pressure switch PS7 (para. 4-78).
d. Using an ohm meter, connect leads to poles of pressure switch PS8. Reading on meter should
be infinity (open). Check operation of pressure switch PS8 by slightly opening aft bleed valve on
streetside platform cylinder. Allow only residual pressure to be bled from cylinder. Once
pressure is relieved from cylinder, close bleed valve and check indicator light. Indicator light
should be lit and ohm reading should be zero (closed). If indicator light is not lit or ohm reading is
not zero, replace pressure switch PS8 (para. 4-78).
ELECTRICAL SYSTEM
31.
ALL LAMPS DO NOT LIGHT
Step 1.
Check intervehicular cables/connectors for corrosion and defects.
a. Using a multimeter (item 17, appx. B) and semitrailer electrical schematic (figure FO-1) as a
guide, check for corroded intervehicle cable hookups. If cables are corroded, clean cables and
reconnect as required.
b. If cables are defective, replace cable as required.
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