Instrument Panel and Interior Switches Illumination — 2016 workshop reference 3842

- Vehicles With: Touchscreen Display) . If the audio system does not respond normally to FDIM inputs, REFER to: Information and Entertainment System (415-00A Information and Entertainment System - General Information - Vehicles With: AM/FM/CD/SYNC, Diagnosis and Testing). REFER to: Information and Entertainment System (415-00 Information and Entertainment System - General Information - Vehicles With: Touchscreen Display) .

Pinpoint Test

All Illumination (Networked and Non-Networked components) Do Not Dim

Refer to Wiring Diagrams Cell 71 for schematic and connector information.

Normal Operation and Fault Conditions

The dimmer switch is integral to the headlamp switch and provides a corresponding voltage signal to the BCM based on which switch is pressed (dim up or dim down).

DTC

Description

Fault Trigger Conditions

B1436:01 Digital Dimmer Switch Input:

General Electrical Failure

A continuous and on-demand DTC that sets in the BCM when the BCM detects an open, short to power or to ground on the dim up or dim down circuits.

Possible Sources

Wiring, terminals or connectors Dimmer switch (part of the headlamp switch) BCM

PINPOINT TEST A : ALL ILLUMINATION (NETWORKED AND NON-NETWORKED COMPONENTS) DO

NOT DIM

A1 RETRIEVE AND RECORD DIAGNOSTIC TROUBLE CODES (DTCS)

Ignition ON. Using the diagnostic scan tool, retrieve all Diagnostic Trouble Codes (DTCs).

Is DTC B1436:01 present?

Yes	GO to A2
No	GO to A6

A2 CHECK THE DIM UP AND DIM DOWN CIRCUITS FOR A SHORT TO VOLTAGE

Source reference 3842

2016 Mustang workshop publication supplied to Mustang Atlas. Original technical text and illustrations; HTML formatting by Mustang Atlas. Source page numbering is retained for traceability. Follow the configuration, revision, warnings, and cross-references in the material. About this edition.