CIRCUIT RESISTANCE TESTS
Note. If concern is not found while performing circuit resistance tests, remove starter and perform SOLENOID TEST under BENCH TESTING.
Note. If vehicle is equipped with dual batteries, tests must be performed on both batteries.
DISABLING/ENABLING IGNITION & FUEL SYSTEMS
| WARNING | To prevent engine from starting while performing tests, always disable ignition and fuel systems. |
Note. On models equipped with diesel engines, removing fuel pump relay may cause a DTC. Ensure all DTCs are cleared from memory.
Disabling Ignition & Fuel Systems
Remove Automatic Shutdown Relay (ASD) located in power distribution center. On 5.9L diesel engines, remove fuel pump relay located in power distribution center. Refer to power distribution center cover for proper relay location. Power distribution center is located in engine compartment.
Enabling Ignition & Fuel Systems
When testing and/or repairs have been completed, verify battery condition. After starter tests have been completed, recharge battery as necessary. Disconnect all test equipment. Install Automatic Shutdown (ASD) relay. On 5.9L diesel engines, install fuel pump relay. On all models, start engine several times to verify malfunction has been corrected.