CHART - 2 - ENGINE CRANKS BUT WILL NOT START (Cont'd) -726280639

TM 9-2320-364-20-1

Section IV. TROUBLESHOOTING CHARTS (Cont.)

D. CHART - 2 - ENGINE CRANKS BUT WILL NOT START (Cont'd)

STEP/SEQUENCE

RESULT

WHAT TO DO NEXT

C 2- 21

Check for +12 or +24

Volts at Ignition Wire

Turn ignition off.

Less than

Go to C 2--23.

Disconnect vehicle harness

11.5 volts.

connector at ECM.

Turn ignition on.

Read voltage between socket B3

on the vehicle harness connector

Greater than

Go to C 2--22.

(red lead) and a good ground

or equal to 11.5 volts.

(black lead).

C 2- 22

Check for Good

Ground Wire

Read voltage between socket B3

Less than

ECM ground wire (ckt #150)

on vehicle harness connector

11.5 volts.

is open or has a poor connection.

(red lead) and socket D and E

Repair open or poor connection.

on 5-way power harness.

Then go to C 2--30.

Greater than

Go to C 2--11.

or equal to 11.5 volts.

C 2- 23

Check if Ignition

Circuit Breaker is

Okay

Turn ignition off.

Circuit breaker

Go to C 2--24.

Check DDEC ignition

is okay.

circuit breaker (CB13).

Circuit breaker open.

Go to C 2--25.

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