Are there any other engine problems that could affect starting?

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Go to Starting System Check

Go to Step 2

1. Ensure the battery is fully charged.
2. Move Ignition Switch to the Start Position.
3. Measure Voltage across the RH Battery.

Is the voltage reading greater than the value after 15 seconds?

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Go to Step 3

Go to Step 6

Measure battery voltage at terminal B of the starter solenoid.

Is the voltage reading the same as battery voltage?

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Go to Step 4

Go to Step 8

Measure voltage between the negative RH Battery terminal and the Engine Block.

Is the voltage reading less than the value?

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Go to Step 5

Go to Step 9

Replace the Negative Battery cable. Refer to Battery Cable .

Is the repair complete?

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Go to Starting System Check

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Perform a Battery Load test.

Is the battery good?

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Go to Step 7

Go to Step 11

Replace the Stater Motor. Refer to Starter Motor Replacement (7.4L)

Is the repair complete?

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Go to Starting System Check

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Replace the Positive Battery cable between the RH Battery and the Starter Solenoid. Refer to Battery Cable .

Is the repair complete?

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Go to Starting System Check

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1. Connect an auxiliary ground wire between the starter casing and Battery Negative terminal.
2. Turn the Ignition Switch to the start position.

Does the engine crank?

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Go to Step 10

Go to Step 7

1. Remove the starter motor.
2. Clean the starter motor mounting surfaces. Refer to Starter Motor Inspection .
3. Re-install the starter motor.
4. Turn the ignition switch to the start position.

Does the engine crank?

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Go to Starting System Check

Go to Step 7

Replace the Battery. Refer to Battery Replacement .

Is the repair complete?

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Go to Starting System Check

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