Exterior Lighting

Refer to PDU User Guide

The complexity of the electronics involved with the various Electronic Control Modules and the multiplexed communication networks, preclude the use of workshop general electrical test equipment. Therefore, reference should be made to the PDU User Guide for detailed instructions on testing the exterior lamps and circuits.

The PDU systematically tests and analyses the lamp assemblies, the bulbs and the electrical connections to them. It should be noted that the lamps are not wired directly to the switches. Actuation of a switch provides an input signal to the Body Processor which interprets the signal as a request to switch output from the Body Processor, either directly or indirectly to a specific lamp.

Where a fault involving a lamp is indicated by the PDU, before replacing the component, some basic diagnostic methods may be necessary to confirm that connections are good and that wiring is not damaged.