This procedure covers removal and replacement of the starter solenoid on a 2015-2020 Ford F-150 with the 5.0L Coyote V8 engine, including battery disconnection, starter access, and solenoid replacement.

Warnings

Tools required

Parts

• Starter solenoid assembly × 1 — Use OEM Ford specification for 5.0L Coyote starter
• Dielectric grease × 1 — For electrical connections

Preparation

1. Park vehicle on level ground and apply parking brake
2. Place wheel chocks behind rear wheels
3. Allow engine to cool completely if recently operated
4. Open hood and secure with prop rod
5. Disconnect negative battery terminal first, then positive terminal to prevent electrical shorts
6. Raise front of vehicle using floor jack and support securely on jack stands rated for vehicle weight
7. Remove plastic engine undershield if equipped to access starter from below

Procedure

1. 1

   Disconnect battery cables
   Using appropriate socket, loosen and remove negative battery terminal first, then positive terminal. Move cables away from battery posts to prevent accidental reconnection during service.
   Torque spec

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

   Locate starter assembly
   From underneath the vehicle, locate the starter motor on the passenger side of the engine block, between the engine and transmission bellhousing. The starter is mounted with two bolts to the transmission housing.
3. 3

   Disconnect starter electrical connections
   Identify the two electrical connections on the starter solenoid: the large battery cable (B+ terminal) and the smaller trigger wire from the ignition switch. Remove the nut securing the battery cable to the solenoid stud, then disconnect the trigger wire connector by pressing the release tab or removing the retaining screw.
   ⚠Mark or photograph wire positions before disconnection to ensure correct reassembly
   Torque spec

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

   Remove starter mounting bolts
   Using a socket with extension, remove the two starter mounting bolts that secure the starter to the transmission bellhousing. The upper bolt may require a longer extension for access. Support the starter with one hand while removing the final bolt to prevent it from dropping.
   ⚠The starter assembly weighs approximately 15 lbs. Ensure secure grip before removing final bolt
   Torque spec

   Mounting Bolts42 Nm (31 lb-ft)
5. 5

   Remove starter from vehicle
   Carefully lower the starter assembly from its mounting position. You may need to rotate or angle the starter slightly to clear the transmission bellhousing and any surrounding components. Place the starter on a clean workbench.
6. 6

   Remove solenoid from starter
   With starter on workbench, locate the solenoid mounting screws or bolts (typically 2-3 screws). Remove these fasteners and carefully separate the solenoid from the starter motor housing. Note the position of the plunger linkage that connects to the starter drive mechanism.
   ℹ️The solenoid plunger spring may be under tension. Control the solenoid during removal to prevent sudden separation
   Torque spec

   Connector Screws5 Nm (4 lb-ft)
7. 7

   Clean starter electrical contacts
   Using a wire brush, clean the electrical contact surfaces on the starter motor where the solenoid mounts. Remove any corrosion, dirt, or oxidation from both the starter housing contact points and the mounting surface to ensure good electrical conductivity.
8. 8

   Install new solenoid
   Position the new solenoid onto the starter motor, ensuring the plunger engages correctly with the starter drive shift lever. Align mounting holes and install solenoid mounting screws. Tighten screws evenly in a cross pattern to the specified torque.
   ⚠Ensure plunger linkage is properly engaged before tightening screws. Improper engagement will prevent starter operation
   Torque spec

   Connector Screws5 Nm (4 lb-ft)
9. 9

   Reinstall starter assembly
   Lift the starter with new solenoid back into position on the transmission bellhousing. Align the mounting holes and start both mounting bolts by hand to ensure proper thread engagement. Tighten bolts evenly to specified torque.
   Torque spec

   Mounting Bolts42 Nm (31 lb-ft)
10. 10

    Reconnect starter electrical connections
    Reconnect the trigger wire to the small terminal on the solenoid, ensuring it clicks into place or tightening the retaining screw. Connect the main battery cable to the B+ stud on the solenoid and install the retaining nut. Apply small amount of dielectric grease to connections before final assembly. Tighten terminal nut to specification.
    Torque spec

    Battery Terminal Bolts6 Nm (4 lb-ft)
11. 11

    Reinstall undershield and lower vehicle
    If removed, reinstall the plastic engine undershield and secure with original fasteners. Remove jack stands and carefully lower the vehicle to the ground.
12. 12

    Reconnect battery
    Clean battery terminal posts and cable ends with wire brush if needed. Reconnect positive battery terminal first, then negative terminal. Tighten terminal bolts to specification, being careful not to overtighten and crack the terminal.
    ⚠Do not overtighten battery terminal bolts as this can crack the terminal or damage the battery post
    Torque spec

    Battery Terminal Bolts6 Nm (4 lb-ft)

Reassembly

1. Ensure all electrical connections are secure and properly routed away from hot exhaust components
2. Verify starter mounting bolts are torqued to specification to prevent starter misalignment
3. Confirm battery terminals are tight and secure before attempting to start vehicle
4. Double-check that no tools or parts were left in the engine bay or under the vehicle

Verification

• Turn ignition key to START position and verify starter engages immediately without grinding or hesitation
• Listen for smooth cranking operation without clicking, buzzing, or intermittent engagement
• Verify engine starts normally and starter disengages when key is released to RUN position
• Check that no warning lights related to charging system remain illuminated after startup
• Perform a visual inspection under the vehicle to ensure no leaks or loose components are present
• Test start the vehicle 3-5 times from cold to verify consistent starter operation

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