AUXILIARY PUMP WILL NOT PUMP FUEL-continued

TM 9-2320-279-20-1

Troubleshooting Malfunctions (Cont)

Table 2-9.

Troubleshooting (Cont)

Malfunction

Test or Inspection

Corrective Action

TANKER SYSTEM (CONT)

5. AUXILIARY PUMP WILL NOT PUMP FUEL (CONT).

Step 6.

Check for defective auxiliary pump power wire. Remove auxiliary pump junction box cover

(para 7-48). Check resistance of red wire between relay terminal E3 and APC AUXILIARY

PUMP CONTROL switch.

If resistance is more than zero ohms, replace wire, install main, control, and auxilia-

ry pump junction box covers (paras 7-47, 7-48, and 7-49).

NOTE

There are two model configurations when working on auxiliary pump system.

Model B incorporates a ground strap from auxiliary pump junction box to auxiliary

pump. Model A does not incorporate this ground strap.

Perform step (6.1) only if working on Model B.

Step 6.1. Check for defective or poor auxiliary pump junction box ground. Check resistance between

ground stud in auxiliary pump junction box and a known good ground.

If resistance is more than zero ohms, replace ground strap from auxiliary pump junc-

tion box to auxiliary pump.

Change 5

2-232.1/(2-232.2 blank)