Cooling Fan Relay

Replace the cooling fan relay in a 2005 Dodge Viper 8.3L V10, located in the Power Distribution Center in the engine compartment.

Warnings

Tools required

Parts

• Cooling fan relay × 1 — Mopar 04692319 or equivalent

Preparation

1. Park vehicle on level ground and engage parking brake.
2. Turn ignition OFF and remove key.
3. Allow engine to cool if recently operated.
4. Disconnect battery negative terminal and wait 2 minutes for system capacitors to discharge.
5. Locate the Power Distribution Center (PDC) on the driver's side of the engine compartment, near the firewall.

Procedure

1. 1

   Access Power Distribution Center
   Open the hood and locate the black Power Distribution Center box on the driver's side of the engine bay. The PDC is mounted near the firewall and contains fuses and relays for various electrical systems.
2. 2

   Remove PDC cover
   Release the locking tabs on the sides of the PDC cover by pressing them inward or lifting them upward depending on design. Lift the cover straight up to remove it. The underside of the cover typically has a relay and fuse diagram for reference.
3. 3

   Identify cooling fan relay location
   Refer to the relay diagram on the underside of the PDC cover or in the owner's manual to identify the cooling fan relay position. The Viper typically uses a high-current relay for the cooling fan system. Note the relay orientation before removal, as some relays are directional.
4. 4

   Remove old cooling fan relay
   Using needlenose pliers or a relay puller, grasp the body of the cooling fan relay firmly and pull straight up with steady pressure. Rock the relay gently side-to-side if needed to break the connection, but do not bend the relay terminals. Remove the relay completely from its socket.
5. 5

   Inspect relay socket
   Examine the relay socket in the PDC for corrosion, damage, or debris. Check that all socket terminals are present and not bent or pushed back into the housing. If corrosion is present, spray electrical contact cleaner into the socket and allow it to dry completely. Use compressed air to remove any debris.
6. 6

   Install new cooling fan relay
   Align the new relay with the socket, ensuring the relay orientation matches the original configuration and any keying features are properly aligned. Apply a small amount of dielectric grease to the relay terminals if desired for corrosion protection. Press the relay straight down into the socket with firm, even pressure until it seats completely and clicks or bottoms out.
7. 7

   Reinstall PDC cover
   Position the PDC cover over the relay box, ensuring no wires are pinched. Press down on the cover until all locking tabs engage fully and the cover is secure.
8. 8

   Reconnect battery
   Reconnect the battery negative terminal and tighten the terminal clamp securely. Ensure the connection is clean and tight.

Reassembly

1. All reassembly is included in the procedure steps above.

Verification

• Turn the ignition to the ON position without starting the engine. Check that no warning lights indicate electrical system faults.
• Start the engine and allow it to reach operating temperature (approximately 200°F coolant temperature). The cooling fan should activate when the thermostat opens and coolant temperature reaches the fan activation threshold.
• If equipped with air conditioning, turn the A/C on with the fan speed at maximum. The cooling fan should activate immediately to support A/C condenser cooling.
• Listen for smooth fan operation without grinding, clicking, or relay chatter. The fan should run steadily when activated.
• Turn off the engine and verify the cooling fan stops within a few seconds, or continues to run briefly if the coolant temperature is high (normal post-shutdown operation).
• Check that no electrical burning smell is present and the relay is not excessively hot to the touch after operation.

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