how to troubleshoot my Ram 1500 DT (2019-Present) that won’t start after sitting

Solution

1. Preparation

• Gather tools: OBD-II scanner, multimeter, socket set, torque wrench.
• Ensure the vehicle is in a well-ventilated area and the ignition is off.

2. Battery Inspection

• Disconnect the negative battery terminal first, followed by the positive terminal.
• Clean any corrosion from the terminals using a wire brush and a battery terminal cleaner.
• Reconnect the terminals securely and check the voltage with a multimeter.

3. Fuel System Check

• Locate the fuel pump relay in the fuse box and replace it if it has failed.
• If the relay is functional, check the fuel pump fuse and replace it if necessary.
• If the fuse is intact, access the fuel pump connector, and use a multimeter to check for voltage while cranking the engine. If no voltage is present, further investigate the wiring or fuel pump.

4. Starter Motor Inspection

• If the battery is good and the fuel system checks out, inspect the starter motor.
• Remove the starter motor from the vehicle by disconnecting the electrical connectors and unbolting it from the engine.
• Test the starter motor by connecting it directly to a battery; it should engage and spin. If it does not, replace the starter motor.

5. Reassemble and Test

• Reinstall the starter motor and reconnect all electrical connectors.
• Reconnect the battery terminals (positive first, then negative).
• Attempt to start the engine and observe the results.