DTC B134E-14: Switch Illumination Adjustment Control - Circuit short to ground or open: Action

NOTE: To validate the repair firstly run the engine for 30 seconds and check the dimmer switch function, then use the Jaguar Land Rover approved diagnostic equipment to check this DTC is no longer set within the body control module

Refer to the electrical circuit diagrams and check the dimmer switch circuit for short circuit to ground, open circuit, high resistance. Repair the wiring harness as necessary