AIR COMPRESSOR RUNS CONTINUOUSLY.

TM 3-1040-279-12&P

TROUBLESHOOTING (CONT)

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

Step 3.

Check continuity of cable assembly 2J1 on air compressor.

Check for continuity between pins A, B, and C of connector 2J1 and terminals 1, 2, and 3 of

terminal board TB14. See wiring diagram (P. 4-165).

If continuity is not present in all cases, replace cable assembly 2J1 (P. 4-151).

If continuity is present in all cases, reconnect cable assembly and go to next step.

Step 4.

Check air pressure switch S114.

Bleed air from air compressor tank through control valve.

Check for continuity between terminal 1 of terminal board TB14 and terminal X2 of relay

K104.

If continuity is present, go to next step.

If continuity is not present, replace pressure switch S114 (P. 4-151).

Step 5.

Check relay K104.

Check for continuity between terminals X1 and X2 of relay K104.

If continuity is present, go to next step.

If continuity is not present, replace relay K104 (P. 4-151).

Step 6.

Check air compressor.

Set POWER switch to ON.

Check for 28v between terminals X1 and A1 of relay K104.

If 28v is present, replace air compressor (P. 4-151).

If 28v is not present, replace relay K104 (P. 4-151).

10. AIR COMPRESSOR RUNS CONTINUOUSLY.

Step 1.

Check air compressor hoses for leaks.

If leaks are found, refer to TM 9-2350-261-20-1 for equipment mounted on M1059

vehicles or TM 3-1040-280-20&P for equipment mounted on M1037/M1097 vehicles.

If no leaks are found, go to next step.

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Change 4