Part 1 of 2
LAMPS/LIGHTING - EXTERIORLamp Systems
JR 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 body ground to operate properly. Plastic lamps require a wire in the harness to supply body ground to the lamp socket. 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.
Begin electrical system failure diagnosis by testing 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.
Fig.1 Daytime Running Lamp Module:
Daytime Running Lamp (Canada Only)
JR vehicles built for use in Canada are equipped with a Daytime Running Lamp (DRL) system. The DRL system operates the high beam filaments at a lower intensity when the engine is operating and the exterior lamp switch is in either the OFF or parking lamp ON position and the parking brake is not applied. The DRL system is controlled by the Daytime Running Lamp Module located on the back of the multi-function module behind the instrument panel. The DRL module overrides the headlamp switch when the headlamps are turned OFF. The headlamps operate normally when the headlamps are turned ON.
The DRL system is controlled by the Daytime Running Lamp Module located on the back of the multi-function module behind the instrument panel (Fig.1). The DRL module overrides the headlamp switch when the headlamps are turned OFF. The headlamps operate normally when the headlamps are turned ON.
Headlamp Time Delay System
The optional Headlamp Time Delay system is controlled by the Body Controller (BC) and a relay located in the junction block. The headlamp time delay system can be activated by turning ON the headlamps when the engine is running, turn OFF the ignition switch, then turn OFF the headlamp switch. The BC will allow the headlamps to remain ON for 90 seconds before they automatically turn OFF. Refer to the Owner's Manual for more information.
BRAKE LAMP SWITCH
The brake lamp switch is located under the instrument panel at the brake pedal arm. It controls operation of the vehicle's brake lamps. Also, if the vehicle is equipped with speed control, the brake lamp switch will deactivate speed control when the brake pedal is depressed.
When the brake pedal is depressed, the plunger on the outside of the switch extends outward. This action closes the electrical contacts within the switch, completing the circuit to the brake lamps at the rear of the vehicle, thus illuminating the brake lamps and the Center-High-Mounted Stop Lamp (CHMSL).