This procedure covers the replacement of a single ignition coil on a 2014 Ram 2500 with the 6.7L Cummins diesel engine, which does not use traditional ignition coils or spark plugs.

Warnings

Tools required

Parts

• Ignition coil (if diesel auxiliary ignition system equipped) × 1 — Use OEM specification

Preparation

1. Ensure engine is cool to the touch
2. Park vehicle on level ground and engage parking brake
3. Disconnect negative battery cable and wait 2 minutes for system discharge
4. Verify which system uses the ignition coil being replaced (likely auxiliary heater or aftermarket accessory)

Procedure

1. 1

   Locate the ignition coil assembly
   Since the 6.7L Cummins diesel does not have spark plugs or traditional ignition coils for engine operation, locate the specific ignition coil you are replacing. This is typically part of an auxiliary cab heater system mounted near the firewall or under the dash. Trace the coil connector to identify the correct component.
2. 2

   Disconnect electrical connector
   Press the release tab on the electrical connector and pull straight away from the ignition coil. Do not pull on the wires themselves. Inspect the connector terminals for corrosion or damage.
3. 3

   Remove mounting hardware
   Remove the mounting bolts securing the ignition coil to its bracket or mounting surface. Note the orientation and position of any spacers or washers for reinstallation.
   Torque spec

   Mounting Bolts37 Nm (27 lb-ft)
4. 4

   Remove the ignition coil
   Carefully extract the ignition coil from its mounting location. If equipped with a bracket, note the orientation for proper reinstallation of the new coil.
5. 5

   Clean mounting surfaces
   Clean the mounting bracket and surrounding area with electrical contact cleaner to ensure proper grounding and heat dissipation. Remove any debris or corrosion from bolt holes.
6. 6

   Install new ignition coil
   Position the new ignition coil in the mounting location, ensuring correct orientation. Install mounting bolts finger-tight initially to allow for adjustment if needed.
7. 7

   Torque mounting hardware
   Torque the mounting bolts to specification using a torque wrench. Ensure the coil is seated properly and does not move when fasteners are tightened.
   Torque spec

   Mounting Bolts37 Nm (27 lb-ft)
8. 8

   Reconnect electrical connector
   Apply a small amount of dielectric grease to the connector terminals if desired for corrosion protection. Press the connector firmly onto the ignition coil until you hear or feel a positive click indicating full engagement.
9. 9

   Reconnect battery
   Reconnect the negative battery cable. Ensure the connection is clean and tight to prevent voltage drop issues.

Reassembly

1. Double-check all electrical connections are fully seated and secure
2. Verify no tools or parts were left in the engine compartment
3. Ensure all mounting hardware is torqued to specification

Verification

• Turn ignition to ON position (do not start) and verify no warning lights related to the auxiliary system appear
• If equipped with auxiliary cab heater, test operation to confirm proper function
• Listen for unusual sounds or observe any fault codes that may indicate improper installation
• Verify the ignition coil is securely mounted and connector is fully engaged

More procedures for this vehicle