TM 9--2350--292--20--10174 00--1LOW BRAKE PRESSURE WARNING LIGHT DOES NOT LIGHT WHEN BRAKEPRESSURE IS BELOW 450 PSI (OLD CONFIGURATION) OR 525 PSI (NEWCONFIGURATION WITH BRAKE MODULATION)0174 00THIS WORK PACKAGE COVERS:Low Brake Pressure Warning Light Does Not Light When Brake Pressure Is Below 450 PSI (Old Configuration)Or 525 PSI (New Configuration With Brake Modulation)INITIAL SETUP:Tools and Special ToolsGeneral mechanic’s tool kit (item 1, WP 0717 00)Multimeter (item 84, WP 0717 00)Equipment ConditionsVehicle MASTER switch OFF (TM 9--2350--292--10)LED has been replacedSubfloor plates 13 and 16 removed (WP 0454 00)Personnel RequiredTwoIs 24 V dc present?1. Disconnect lead 48 from low brake pressureswitch.2. Turn MASTER switch ON(TM 9--2350--292--10).3. Place multimeter red lead in lead 48 connectorsocket and black lead to ground. Check forvoltage.4. Turn MASTER switch OFF(TM 9--2350--292--10).noyesABCONTINUED ON NEXT PAGE1. Reconnect lead 48 to low brake pressureswitch.2. Disconnect harness 4W155 P1 from brakepressure switch.3. Turn MASTER switch ON(TM 9--2350--292--10).4. Place multimeter red lead in harness 4W155P1 socket B and black lead to ground. Checkfor voltage.5. Turn MASTER switch OFF(TM 9--2350--292--10).Is 24 V dc present?WARNINGRemove rings, bracelets, wristwatches,and neck chains before working on anyvehicle. Jewelry can catch on equip-ment and cause injury, or may shortacross an electrical circuit and causesevere burns or electrical shock.Go to Step C.FORWARD
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