TM-9-2510-247-13-P

FIFTH WHEEL TOWING DEVICE MODEL 250M

TECHNICAL MANUAL; OPERATOR’S, UNIT, AND DIRECT SUPPORT MAINTENANCE MANUAL, REPAIR PARTS AND SPECIAL TOOLS LIST

JULY 2004

TM-9-2510-247-13-P - Page 138 of 522

TM 9-2510-247-13&P

0027 00

UNIT TROUBLESHOOTING - Continued

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

ELECTRICAL SYSTEM - Continued

Step 6.

Is voltage coming into and out of solenoids?

If no, check if power is present at solenoid, but not coming out of solenoid.

If power is present at solenoid , but not coming out of solenoid, replace solenoid.

If yes, go to step 6.

Step 7.

Is voltage found at top of hydraulic motors when push button switch is on?

If no, repeat steps 1 through 5.

If yes, replace on/off switch.

2.

LOSS OF POWER TO THE 12/24 VOLT JUNCTION BOX

Step 1.

Is there minimum12VDC on batteries?

If no, go to step 2.

If yes, go to step 3.

Step 2.

Is NATO slave cable connected?

If no, install NATO cable in receptacle on prime mover and receptacle on 12/24

volt junction box.

If yes, go to step 3.

Step 3.

Are there any broken or frayed wires?

If no, go to step 4.

If yes, repair or replace wires as necessary (WP 0051).

Step 4.

Do all connections inside 12-24 volt junction box have voltage?

If no, ensure all connections are clean. Pay special attention to all grounds

(WP 0088).

If connections still do not have voltage, replace 12-24 volt

junction box.

3.

VOLTMETER DOES NOT WORK

Step 1.

Is there minimum12VDC on batteries?

If no, go to step 2.

If yes, go to step 3.

Step 2.

Is NATO slave cable connected?

If no, install NATO cable in receptacle on prime mover and receptacle on 12/24

volt junction box.

If yes, go to step 3.

0027 00-2