Neutral Safety Switch

This procedure replaces the neutral safety switch on a 2008 Dodge Viper with 8.4L V10 and 6-speed manual transmission, which prevents the engine from starting unless the clutch pedal is depressed.

Warnings

Tools required

Parts

• Neutral safety switch (clutch pedal position switch) × 1 — Use OEM specification

Preparation

1. Park vehicle on level ground and engage parking brake.
2. Place wheel chocks behind rear wheels.
3. Disconnect negative battery terminal using 10mm wrench and wait 2 minutes for airbag system discharge.
4. Adjust driver's seat fully rearward for maximum access to pedal area.
5. Remove driver's side lower dashboard trim panel to access clutch pedal assembly area if additional working room is needed.

Procedure

1. 1

   Access clutch pedal assembly
   Position yourself in the driver's footwell with adequate lighting. Locate the clutch pedal assembly mounted to the firewall bracket. The neutral safety switch (clutch pedal position switch) is a plunger-type switch mounted on the clutch pedal bracket where it contacts the pedal arm; verify the exact mounting location against factory service documentation. Identify the switch body and its electrical connector. Identify the switch body and its electrical connector.
2. 2

   Disconnect electrical connector
   Locate the electrical connector on the neutral safety switch. Press the release tab on the connector and pull straight out to disconnect. Do not pull on the wires. Inspect the connector terminals for corrosion or damage.
3. 3

   Remove neutral safety switch mounting fasteners
   Locate the switch mounting fasteners securing the switch to the clutch pedal bracket. Remove the switch retaining fasteners or release the switch from its bracket retainer; the exact retention method (bolted or snap-in/twist-lock) and fastener size must be verified against factory service documentation for this vehicle. Support the switch as you remove the second fastener to prevent it from falling.
   ⚠The clutch pedal may shift slightly when the switch is removed. Keep hand clear of pedal travel path.
4. 4

   Remove neutral safety switch
   Carefully withdraw the neutral safety switch from the clutch pedal bracket. Note the orientation of the switch plunger in relation to the clutch pedal arm for proper installation of the new switch. The plunger should contact the pedal arm when the clutch is released (pedal up position).
5. 5

   Inspect mounting area
   Inspect the clutch pedal bracket and mounting surface for damage, cracks, or wear. Clean the mounting surface with a wire brush if corrosion is present. Check the pedal arm contact surface where the switch plunger makes contact and clean if necessary. Verify the clutch pedal pivots smoothly without binding.
6. 6

   Position new neutral safety switch
   Position the new neutral safety switch on the clutch pedal bracket, ensuring the plunger is oriented to make contact with the clutch pedal arm in the released (up) position. The switch permits starter engagement only when the clutch pedal is fully depressed; verify the exact plunger action and switch logic against factory service documentation before installation. Align the switch mounting holes with the bracket.
7. 7

   Install switch mounting fasteners
   Install the 2 mounting bolts finger-tight to hold the switch in position. Verify the switch plunger aligns properly with the clutch pedal arm contact point. Secure the switch to the bracket using the correct retention method for this vehicle; if bolted, tighten securely but do not overtighten as the plastic switch housing can crack. Verify retention method and fastener size against factory documentation.
8. 8

   Reconnect electrical connector
   Reconnect the electrical connector to the neutral safety switch, pushing firmly until the locking tab clicks into place. Gently tug on the connector to verify it is fully seated and locked.
9. 9

   Reconnect battery and test
   Reconnect the negative battery terminal using a 10mm wrench. With the clutch pedal released (up position), attempt to start the engine by turning the key to the start position. The engine should NOT crank. Depress the clutch pedal fully and attempt to start the engine. The engine should crank normally. If the engine cranks with the clutch released, the switch is incorrectly installed or defective.

Reassembly

1. Reinstall driver's side lower dashboard trim panel if it was removed during preparation.
2. Return driver's seat to normal position.
3. Clear all tools and parts from vehicle interior.

Verification

• With clutch pedal released, verify the engine will not crank when ignition is turned to start position.
• With clutch pedal fully depressed, verify the engine cranks normally.
• Test the switch function multiple times by releasing and depressing the clutch pedal while attempting to start.
• Verify no warning lights are illuminated on the instrument cluster after testing.
• Ensure the clutch pedal operates smoothly with normal feel and that the switch does not interfere with pedal travel.

Related trouble codes on this vehicle

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