Amperage Draw
NOTE:
Ensure battery is fully charged and terminals are clean and tight. Perform a battery load test before proceeding.
- Using an inductive volt/ammeter type battery tester, clamp ammeter probe to positive battery cable. Connect positive voltmeter lead to positive battery post and negative lead to negative battery post. On 3.3L engine, disconnect coil pack harness connector. On 5.9L diesel engine, disconnect both wires at fuel solenoid on injection pump. On all other models, disconnect coil wire from distributor cap and attach to ground.
- Ensure that all vehicle accessories are off and transmission is in Neutral or Park. Crank engine using ignition key and observe exact reading on volt/ammeter. Readings should be as specified. See STARTER SPECIFICATIONS table in this article.
- If amperage is greater than specified or voltage is less than specified, check and repair wiring between battery and starter. If wiring is okay, turn engine by hand and check for ease of turning. If engine turns okay, proceed to STARTER RESISTANCE test below.