how to fix my Ram 1500 DT (2019-Present) if it won't start in cold weather

Solution

1. Preparation

• Gather tools and parts. Ensure the vehicle is parked on a flat surface.
• Safety: Disconnect the negative battery terminal to prevent electrical shorts.

2. Battery Maintenance

1. Inspect and Clean

   • Remove the battery terminals and clean any corrosion using a wire brush and a mixture of baking soda and water.
   • Reattach terminals securely after cleaning.

2. Battery Test

   • If the battery voltage is low, use a battery tester to check the health of the battery. Replace if necessary.

3. Starter System Check

1. Starter Bypass Test
   • Use a jumper wire to bypass the ignition switch and connect the starter solenoid directly to the battery to test for functionality.
   • If the starter engages, replace the ignition switch.

4. Fuel System Check

1. Fuel Pressure Test
   • Connect a fuel pressure gauge to the fuel rail test port.
   • Turn the ignition to the ON position (without starting) to check if the fuel pump activates and achieves the required pressure (check manual for specs).
   • If pressure is low, inspect fuel pump and filter.

5. Engine Oil Check

1. Oil Inspection
   • Check engine oil level and viscosity. If the oil is too thick for cold weather, consider changing to a lower viscosity oil compatible with winter conditions.