Lighting and Horns: Description and Operation
GENERAL INFORMATIONAll Viper vehicles use lighting on the interior and exterior of the vehicle for illuminating and indicating purposes. Lighting circuits are protected by fuses or circuit breakers. Lighting circuits require an overload protected power source, on/off device, lamps and good body ground to operate properly Plastic lamps require a wire in the harness to supply body ground to the lamp socket. Lamp sockets that are exposed to moisture should be coated with Mopar Multi-purpose Grease or equivalent to avoid corrosion. If a socket has become corroded, clean socket and bulb base with abrasive fiber sanding pad or metallic bristle brush. Replace sockets and bulbs that are deformed from corrosion that could prevent continuous body ground.
Wire connectors can make intermittent contact or become corroded. Before coupling wire connectors, inspect the terminals inside the connector. Male terminals should not be bent or disengaged from the insulator. Female terminals should not be sprung open or disengaged from the insulator. Bent and sprung terminals can be repaired using needle nose pliers and pick tool. Corroded terminals appear chalky or green. Corroded terminals should be replaced to avoid recurrence of the problem symptoms. Wire connector terminals should be coated with Mopar Multi-purpose Grease or equivalent to avoid corrosion.
Begin any electrical system failure diagnosis by testing all related fuses and circuit breakers in the fuse block and engine compartment. Verify that bulbs are in good condition and test continuity of the circuit ground.
CIRCUIT OPERATION
Exterior Lamp
When the Remote Keyless Entry (RKE) module determines the exterior lamps should be flashed is supplies power to circuit L7. The L7 circuit connects from the RKE module to the exterior lamps.
Illumination Lamps
The illumination lamp is controlled by the dimmer switch internal to the headlamp switch. Power for the lamp is supplied on circuit E2. This circuit is protected by a 4 amp fuse in cavity 2 of the fuse block.
All of the gauges and the message center use illumination lamps. These lamps are controlled by the dimmer switch. Power for the lamps is supplied on circuit E2. This circuit is protected by a 4 amp fuse in cavity 2 of the fuse block.
Power for the fuse is supplied on circuit E1 from the headlamp switch. This circuit is HOT when the headlamp switch is in the PARKING lamp or ON position.
Battery voltage for this portion on the headlamp switch is supplied on circuit F34 from the 20 amp fuse in cavity 11 of the Power Distribution Center (PDC). This fuse is HOT at all times.