Electronic Parking Brake Motor

Remove and replace the electronic parking brake motor assembly on a 2005 Dodge Viper, ensuring proper brake function and system calibration.

Warnings

Tools required

Parts

• Electronic parking brake motor assembly × 1 — Use OEM specification
• Mounting hardware kit (if corroded) × 1 — Use OEM specification

Preparation

1. Park vehicle on level surface and place transmission in first gear (manual) or Park (automatic)
2. Place wheel chocks at front wheels
3. Open hood and disconnect battery negative terminal. Wait 2 minutes for system capacitors to discharge
4. Loosen rear wheel lug nuts while vehicle is on ground
5. Raise rear of vehicle with floor jack and secure on jack stands at manufacturer-specified lift points
6. Remove rear wheels completely
7. Verify electronic parking brake motor location (typically mounted to rear caliper or backing plate)

Procedure

1. 1

   Release Electronic Parking Brake Tension
   The 2005 Viper uses a mechanical hand-lever parking brake. Fully release the hand lever inside the cabin to slacken the parking brake cables. There is no scan tool service mode or motor actuator for this system.es are slack. Note the number of rotations for reinstallation reference.
2. 2

   Disconnect Electrical Connector
   Locate the electrical connector on the parking brake motor housing. Press the locking tab and carefully pull the connector straight off the motor. If connector is corroded or difficult to remove, gently wiggle while pulling. Do not force. Clean any corrosion from connector pins with electrical contact cleaner if present.
3. 3

   Disconnect Parking Brake Cables
   Identify the parking brake cable attachment point on the motor assembly. Most electronic parking brake motors have a cable end fitting that inserts into a slot or bracket on the motor housing. Use needle-nose pliers to compress any cable retaining clip or spring, then slide the cable end out of the motor bracket. Support the cable to prevent it from snapping back under residual tension. Mark cable routing with tape or note positions for reinstallation.
   ⚠Cable may have residual tension even after motor retraction. Control cable carefully to prevent injury.
4. 4

   Remove Motor Mounting Fasteners
   Remove the mounting bolts securing the electronic parking brake motor to the caliper bracket or backing plate. There are typically 2-3 mounting bolts. Inspect fasteners for corrosion and check that they are Torx or metric bolts as typical for this platform. Support the motor assembly while removing the final fastener to prevent it from falling.
   Torque spec

   Caliper Mounting Bolts88 Nm (65 lb-ft)
5. 5

   Remove Electronic Parking Brake Motor
   Carefully pull the motor assembly away from the mounting surface. If motor is stuck due to corrosion, gently tap the housing with a plastic mallet to break the seal. Do not pry against brake components. Once free, maneuver the motor out from the wheel well. Inspect the mounting surface for damage, corrosion, or debris.
6. 6

   Prepare Mounting Surface
   Clean the motor mounting surface on the caliper bracket or backing plate with a wire brush and brake cleaner. Remove all corrosion, old gasket material (if present), and debris. Ensure mounting surface is flat and undamaged. Inspect mounting bolt holes for stripped threads or damage. Apply a light coating of anti-seize compound to bolt threads if mounting into aluminum.
7. 7

   Install New Electronic Parking Brake Motor
   Position the new electronic parking brake motor onto the mounting surface, aligning the mounting holes. Ensure the motor actuator shaft and cable attachment point are oriented correctly for cable routing. Hand-thread all mounting bolts to prevent cross-threading. Tighten mounting bolts evenly in a cross pattern to the specified torque of 27 Nm (20 lb-ft).
   Torque spec

   Caliper Mounting Bolts88 Nm (65 lb-ft)
8. 8

   Reconnect Parking Brake Cables
   Route parking brake cables to the motor assembly following the original path noted during removal. Insert cable end fittings into the motor bracket slots and secure with retaining clips or springs. Ensure cables are properly seated and clips are fully engaged. Verify cables move freely without binding or rubbing against sharp edges.
9. 9

   Reconnect Electrical Connector
   Push the electrical connector firmly onto the parking brake motor terminals until the locking tab clicks into place. Tug gently on the connector to verify it is fully locked. Ensure no wires are pinched and the connector boot is properly sealed against moisture intrusion.
10. 10

    Reinstall Wheels and Lower Vehicle
    Reinstall the rear wheels, hand-threading all lug nuts. Lower the vehicle until wheels contact the ground but vehicle weight is still on jack stands. Torque wheel lug nuts to 135 Nm (100 lb-ft) in a star pattern. Fully lower the vehicle and remove jack stands. Torque lug nuts again in star pattern to final specification to ensure proper seating.
    Torque spec

    Wheel Lug Nuts142.4 Nm (105 lb-ft)
11. 11

    Reconnect Battery and Calibrate System
    Reconnect the battery negative terminal. The 2005 Viper mechanical parking brake requires no scan tool calibration. Adjust the parking brake cable tension per the factory mechanical adjustment procedure so the brake fully engages within the specified lever travel and fully releases when the lever is down.on, the parking brake will not function.
    ⚠️System calibration is mandatory. An uncalibrated parking brake motor will not hold the vehicle and may result in rollaway.
12. 12

    Functional Test
    With the vehicle safely chocked, apply the mechanical parking brake hand lever and verify the rear brakes engage (vehicle resists rolling). Release the lever and verify the brakes fully release. Repeat 3 times to confirm consistent operation. Release the parking brake and verify motor retracts and brake releases. Repeat this test 3 times to confirm consistent operation. Check for any warning lights on the instrument cluster.

Reassembly

1. Reassembly is included in the procedure steps above
2. Ensure all electrical connectors are fully seated and locked
3. Verify parking brake cables have proper routing without interference
4. Confirm all mounting hardware is torqued to specification

Verification

• Electronic parking brake engages and releases smoothly when commanded from dashboard switch
• No warning lights illuminated on instrument cluster related to parking brake system
• Parking brake holds vehicle securely on an incline (test in safe area with spotter)
• Motor operates quietly without grinding, clicking, or excessive noise
• Parking brake cables move freely without binding
• Scan tool shows no active fault codes for parking brake system
• Vehicle passes rollaway test: with parking brake engaged on slight incline, vehicle does not move

Related trouble codes on this vehicle

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