Defect
On certain vehicles, a dash light dimmer circuit, mounted in the multiplex control unit may be damaged by heat build-up if the dimmer circuit is operated at a setting that is less than full intensity. This would cause a transistor in the module to fail resulting in loss of instrument cluster lighting. Such a condition would prevent the driver from reading the speedometer or other instruments when operating the vehicle in the dark.
Safety Risk
No risk description available.
Remedy
Multiplex unit will be replaced.