electrical

Starter Solenoid

for 2007 Ram 3500 5.9L I6 Cummins · 4WD

Difficulty

Moderate

Time

1.7 h

Tools

Steps

✓Fact-checked. Built from OLP's spec database, then independently fact-checked line by line with every correction applied. Master-tech sign-off by Chris Hackleman is queued. Cross-check torque values against the factory manual, and stop if anything looks unsafe. How our data is made.

This procedure covers the removal and replacement of the starter solenoid on a 2007 Ram 3500 with the 5.9L Cummins diesel engine.

Warnings

⚠️Always disconnect the negative battery cable before working on electrical components to prevent short circuits and injury

⚠The starter assembly can be heavy and awkward to handle. Ensure proper support when removing or installing

ℹ️Do not mix up the electrical connections on the solenoid. Label or photograph connections before removal

Tools required

Socket set (metric and standard)Essential

Ratchet and extensionsEssential

Wrench setEssential

Battery terminal cleaner

Wire brush

Floor jack and jack standsEssential

Wheel chocksEssential

Penetrating oil

Multimeter

As an Amazon Associate and Autel/ANCEL partner, OLP earns from qualifying purchases — how we link. This never changes the specs we publish.

Parts

Starter solenoid × 1 — Use OEM specification or Mopar 68003583AA

As an Amazon Associate and Autel/ANCEL partner, OLP earns from qualifying purchases — how we link. This never changes the specs we publish.

Preparation

Park vehicle on level ground and engage parking brake
Place wheel chocks behind rear wheels
Allow engine to cool completely if recently operated
Raise front of vehicle with floor jack and support on jack stands
Disconnect negative battery cable and secure away from battery post
Disconnect positive battery cable

Procedure

1
Access the starter assembly
Locate the starter motor on the passenger's side of the engine near the transmission bellhousing. You may need to remove the passenger's side front wheel or access from below for better access. The starter is positioned low on the engine block.
2
Document electrical connections
Before disconnecting any wires, take a photograph or make a detailed drawing of all electrical connections to the starter solenoid. Note the position of the battery cable, trigger wire, and any ground connections. This is critical for proper reassembly.
3
Disconnect battery cable from solenoid
Remove the nut securing the large battery cable to the starter solenoid terminal. This is typically a 13mm or 1/2 inch nut. Carefully pull the cable away from the solenoid and secure it out of the way.
4
Disconnect trigger wire
Disconnect the smaller trigger wire from the solenoid. This may be a push-on connector or secured with a small nut. Keep track of any washers or spacers.
5
Remove solenoid mounting hardware
Remove the fasteners securing the solenoid to the starter motor housing (typically two small screws/nuts) and disconnect the internal motor lead strap. Support the solenoid as you remove the last fastener to prevent it from falling.
6
Remove old solenoid
Carefully pull the solenoid away from the starter motor. The solenoid plunger will disengage from the starter drive mechanism. Inspect the plunger and contact points for excessive wear or damage.
7
Prepare new solenoid
Inspect the new solenoid to ensure it matches the original. Check that the plunger moves freely and that all mounting holes align properly. Clean the mounting surface on the starter motor housing with a wire brush if needed.
8
Install new solenoid
Position the new solenoid on the starter motor housing, ensuring the plunger properly engages with the starter drive mechanism. Align the mounting holes and start all mounting bolts by hand before tightening.
9
Secure solenoid mounting bolts
Tighten the solenoid mounting bolts evenly in a cross pattern. Snug the small solenoid mounting screws firmly but do not overtighten to avoid stripping the threads.
10
Reconnect trigger wire
Reconnect the small trigger wire to the solenoid terminal. Ensure the connection is secure and any push-on connectors are fully seated. Reinstall any nuts, washers, or clips that were removed.
11
Reconnect battery cable to solenoid
Attach the large battery cable to the solenoid terminal. Install the nut and tighten securely to ensure good electrical contact. A loose connection here can cause starting problems or excessive heat.
12
Reinstall wheel if removed
If the passenger's side front wheel was removed for access, reinstall it and tighten lug nuts to factory specification (approximately 130 ft-lbs) in a star pattern.

Reassembly

Lower vehicle from jack stands
Reconnect positive battery cable to battery terminal and tighten securely
Reconnect negative battery cable to battery terminal and tighten securely
Clean battery terminals with terminal cleaner if corrosion is present

Verification

Turn the ignition key to the start position and verify the engine cranks normally
Listen for any unusual clicking or grinding noises from the starter area
Verify all electrical connections are secure and not loose
Check that the solenoid engages crisply without hesitation
Test start the vehicle 3-5 times to ensure consistent operation
Inspect for any smoke or heat from the starter area during cranking