ELECTRICAL TROUBLESHOOTING - continued - TM-9-2320-386-24-1-10088

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

0012 00

Electrical Troubleshooting (Contd)

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

a. If continuity is not found, replace accessory/battery switch (TM 9-2320-361-20).

Check continuity of new accessory/battery switch before installation. Install leads 11

in pins A and C. Install lead 27/400 in pin B and lead 27 in pin D. Attempt to start

engine (TM 9-2320-386-10).

b. If starter does not crank engine, go to step 5.

Step 5. Remove lead 74A from pin B of starter switch. With accessory/battery switch in ON

position, engage starter switch, and check for battery voltage at pin B.

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

b. If voltage is present, perform continuity check on lead 74A. If continuity is not

found, replace or repair lead (WP 0125 00).

Step 6. Remove lead 74 from pin D on starter switch, turn accessory/battery switch to ON

position, and check for battery voltage on contact end of lead 74.

a. If voltage is not present, disconnect lead 27/400 from pin B at accessory/battery

switch and check continuity between lead 27/400 and its connection to lead 74.

b. If continuity is not found, replace or repair lead (WP 0125 00). Install lead 74 into

pin D.

Step 7. Attempt to start engine (TM 9-2320-386-10).

If starter does not engage engine, go to step 8.

Step 8. Remove lead 74 from pin D and lead 74A from pin B of starter switch. Engage starter

switch and perform continuity check between pins D and B.

a. If continuity is not found, replace starter switch (WP 0093 00).

b. Check continuity of new starter switch before installation.

c. Install lead 74A in pin B and lead 74 in pin D.

d. Engage starter switch. Starter should turn engine. If not, continue with testing.

Test 6. Check for battery voltage at circuit breakers.

Step 1. Remove leads 10 from circuit breakers. Using voltmeter, check for battery voltage on

contact end of leads 10.

a. If voltage is present, go to step 2.

b. If voltage is not present, perform test 3.

Step 2. Remove leads 11 from circuit breakers. Using multimeter, check for battery voltage at

circuit breaker.

a. If voltage is present at either circuit breaker, replace or repair lead 11

b. If voltage is not present, replace circuit breaker (TM 9-2320-361-20).

END TESTING!

0012 00-5