Starter Solenoid

Replace the starter solenoid on a 2014 Ram 2500 with 6.7L Cummins diesel engine, requiring removal of the starter assembly for solenoid replacement or rebuild.

Warnings

Tools required

Parts

• Starter solenoid × 1 — Use OEM specification or quality aftermarket
• Starter rebuild kit (if applicable) × 1 — Optional full rebuild kit

Preparation

1. Park vehicle on level surface and engage parking brake
2. Chock rear wheels securely
3. Open hood and disconnect negative battery cable, then positive cable
4. Raise front of vehicle with floor jack and support securely on jack stands
5. Allow engine to cool completely if recently operated
6. Remove engine skid plate if equipped (multiple 13mm bolts)
7. Inspect starter location from underneath for access clearance

Procedure

1. 1

   Disconnect battery cables at battery
   Using a 10mm wrench, loosen and remove the negative battery terminal bolt first, then the positive terminal bolt. Remove both cables and secure away from battery posts to prevent accidental contact.
   Torque spec

   Battery Terminal Bolts6 Nm (4 lb-ft)
2. 2

   Access starter from underneath vehicle
   Position yourself under the driver's side of the vehicle. Locate the starter motor on the driver's side of the engine block, between the engine and transmission bellhousing. Identify the electrical connections and mounting bolts.
   ℹ️The 6.7L Cummins starter is mounted low on the engine block. You may need to remove heat shields or brackets for clear access
3. 3

   Disconnect starter electrical connections
   Locate the main battery cable connection on the starter solenoid (large terminal with nut) and the smaller trigger wire connector. Using a 13mm socket, remove the nut securing the main battery cable. Pull the cable straight off the solenoid stud. Disconnect the small trigger wire by pressing the tab and pulling the connector.
   ⚠Note the exact position and routing of all wiring for proper reinstallation. Take a photo if necessary
   Torque spec

   Battery Cable Nut18 Nm (14 lb-ft)
4. 4

   Remove starter mounting bolts
   Using an 18mm socket with extension, remove the two starter mounting bolts that secure the starter to the transmission bellhousing. The bolts thread into the bellhousing from the starter side. Support the starter weight as you remove the second bolt.
   ⚠Starter is heavy and may fall once bolts are removed. Support with one hand while removing final bolt
   Torque spec

   Mounting Bolts46 Nm (34 lb-ft)
5. 5

   Remove starter assembly
   Carefully maneuver the starter assembly away from the bellhousing. It may require slight rotation or tilting to clear the dowel pins and surrounding components. Lower the starter carefully and place on a clean workbench.
   ℹ️Inspect the starter mounting surface and dowel pins on the bellhousing for damage or debris
6. 6

   Remove solenoid from starter
   With starter on workbench, locate the two or three bolts securing the solenoid to the starter motor housing (typically 10mm). Remove these bolts and carefully pull the solenoid away from the starter drive assembly. Note the position of any internal linkage connecting the solenoid plunger to the drive mechanism.
   ⚠Internal springs may be under tension. Control the solenoid removal to prevent components from springing apart
   Torque spec

   Battery Terminal Bolts6 Nm (4 lb-ft)
7. 7

   Clean and inspect starter components
   Use a wire brush to clean the starter mounting face, solenoid mounting surface, and electrical terminals. Inspect the starter drive gear for wear or damage. Clean the bellhousing mounting surface on the vehicle. Spray electrical contact cleaner on all connection points.
   ℹ️If starter shows signs of bearing wear, grinding, or damaged drive gear, consider full starter replacement instead of solenoid-only repair
8. 8

   Install new solenoid to starter
   Position the new solenoid onto the starter motor housing, ensuring any internal plunger linkage properly engages with the drive mechanism. Align the mounting holes and install the solenoid mounting bolts. Ensure the solenoid sits flush against the housing before tightening.
   ⚠Verify plunger linkage is properly connected before fully securing solenoid. Improper assembly will prevent starter engagement
   Torque spec

   Battery Terminal Bolts6 Nm (4 lb-ft)
9. 9

   Reinstall starter assembly to vehicle
   Position the starter assembly to the bellhousing, aligning the mounting holes and ensuring the starter nose seats properly into the bellhousing pilot hole. Install both starter mounting bolts by hand first to ensure proper thread engagement, then tighten progressively.
   Torque spec

   Mounting Bolts46 Nm (34 lb-ft)
10. 10

    Reconnect starter electrical connections
    Connect the main battery cable to the large solenoid terminal stud. Install the nut and tighten to specification. Reconnect the small trigger wire connector, ensuring it clicks into place securely. Verify all connections are tight and properly routed away from heat sources and moving parts.
    ⚠Ensure battery cable connection is clean and tight. Poor connections are a leading cause of starting issues
    Torque spec

    Battery Cable Nut18 Nm (14 lb-ft)
11. 11

    Reinstall protective components
    Reinstall any heat shields, skid plates, or brackets that were removed for access. Ensure all fasteners are properly tightened and nothing interferes with starter operation or electrical connections.
12. 12

    Reconnect battery and lower vehicle
    Reconnect the positive battery cable first, then the negative battery cable at the battery. Tighten battery terminal bolts to specification. Remove jack stands and lower the vehicle to the ground.
    Torque spec

    Battery Terminal Bolts6 Nm (4 lb-ft)

Reassembly

1. Ensure all electrical connections are secure and properly routed
2. Verify starter mounting bolts are torqued to specification to prevent vibration loosening
3. Confirm battery terminals are clean, tight, and free of corrosion
4. Double-check that all skid plates and protective covers are reinstalled

Verification

• Turn ignition key to START position and verify engine cranks smoothly without grinding or hesitation
• Listen for proper solenoid engagement (single click followed by immediate cranking)
• Verify no abnormal noises from starter during cranking
• Check that starter disengages immediately when key is released from START position
• Inspect all electrical connections for signs of heat or arcing after first start
• Test starting system 3-4 times from cold to verify consistent operation

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