Table 4-2. Unit Troubleshooting - Continued

TM 5-4930-233-14

TM 4930-14/1

Table 4-2. Unit Troubleshooting - Continued

ITEM

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

Step 3. Test wiring harness (para 4-25).

Replace or repair harness.

Step 4. Test for defective alternator (para 4-24).

Replace alternator (para 4-24).

ENGINE CRANKS BUT WILL NOT RUN OR RUNS FOR A SHORT TIME ONLY

Step 1. Check wiring harness for proper connections and test (para 4-25).

Correct connections or repair harness as needed (para 4-25).

Step 2. Check fuel strainer and filter for clogging.

Replace or clean elements as needed (para 4-16).

Step 3. Test ignition/starter switch (para 4-26).

Replace switch (para 4-26).

Step 4. Test relays A and B (para 4-26).

Replace defective relay (para 4-26).

Step 5. Disconnect oil pressure switch (para 4-25) and operate engine.

Replace oil pressure switch if engine operates correctly.

NOTE

If engine will not run with new oil pressure switch but will operate with switch

disconnected, troubleshoot engine (TM 9-2805-262-14).

Step 6. Disconnect oil temperature switch (para 4-26). Operate engine.

Replace oil temperature switch if engine operates correctly

NOTE

If engine will not run with new oil temperature switch but will operate with switch

disconnected, troubleshoot engine (TM 9-2805-262-14).

4-9