ELECTRICAL TROUBLESHOOTING - continued - TM-9-2320-386-24-1-10087

TM 9-2320-386-24-1-1

0012 00

Electrical Troubleshooting (Contd)

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

a. If continuity is 1 ohm or less, go to step 3.

b. If continuity is greater than 1 ohm, disconnect ground lead from magnetic starter

relay. Repair or replace ground lead (WP 0125 00), go to test 1, step 1, and retest.

Step 3. Check for battery voltage at lead 214 of magnetic starter relay with starter switch

engaged.

a. If voltage is present, go to step 5.

b. If voltage is not present, go to step 4.

Step 4. Check for battery voltage at leads 10 and 14 on magnetic starter relay. Voltage should

be present.

If voltage is not present, replace or repair lead 14 (WP 0125 00), go to test 1,

step 1, and retest.

Step 5. Check continuity of lead 214 between magnetic starter relay and starter solenoid.

If continuity is not present, replace or repair lead 214 (WP 0125 00). Clean connections

before reinstalling lead. Ensure all connections are tight, go to test 1, step 1, and retest.

Test 4. Test continuity of neutral safety switch.

Step 1. Set parking brake (TM 9-2320-386-10).

Step 2. Ensure transmission is in neutral.

Step 3. Disconnect lead 74A from neutral safety switch and starter switch.

Step 4. Set multimeter to measure continuity. Check continuity of lead 74A.

a. If continuity is not present, repair or replace lead 74A (WP 0125 00).

b. If continuity is present, go to step 5.

Step 5. Disconnect lead 74B from neutral safety switch.

Step 6. Check continuity of neutral safety switch.

a. If continuity is present, connect leads 74A and 74B to leads of neutral safety switch

and go to test 5.

b. If continuity is not present, replace neutral safety switch (WP 0098 00).

Test 5. Test for battery voltage into accessory/battery switch pins A and C.

Step 1. Remove two leads 11 from accessory/battery switch pins A and C. Using multimeter,

check for battery voltage on contact ends of leads 11.

a. If voltage is not present, go to test 6.

b. If voltage is present, install both leads 11 into pins A and C, and go to step 2.

Step 2. Observe battery gauge in dash for proper operation.

a. If battery gauge works, go to step 5.

b. If battery gauge does not work, go to step 3.

Step 3. Remove lead 27/400 from pin B of accessory/battery switch. With accessory/battery

switch turned ON, check for battery voltage at pin B.

a. If voltage is present, go to test 6.

b. If voltage is not present, go to step 4.

Step 4. Remove two leads 11 from pins A and C and lead 27 from pin D. With accessory/battery

switch in ON position, check continuity between pins A and B, followed by pins C

and D.

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