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Home >> Ford >> 2002 >> Cutaway 7.3 F >> Repair and Diagnosis >> External Pages >> Different car >> Section 2466 (Instrument Cluster System And Panel Illumination -- F250-F550 Super Duty) >> Diagnostic Tests >> Instrument Cluster and Panel Illumination >> Pinpoint Tests >> Pinpoint Test A: The Control Illumination Is Inoperative - All Hardwired Illumination >> Normal Operation

Normal Operation

WARNING: This page is about a different car, the 2008 Ford Pickup, 2008 Ford F550 Super Duty, 2008 Ford F450 Super Duty, and 2008 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

Based on input received from the instrument panel dimmer switch, the smart junction box (SJB) sends a pulse-width modulated (PWM) voltage to the hardwired dimmable illumination sources through circuit VLN04 (VT/GY).

DTC B2A32 (LED backlighting output circuit open) - is an on-demand DTC that sets when the SJB detects an open on the LED backlighting output circuit. The DTC also sets as a result when fuse 10 (15A) has failed or is removed.

DTC B2A33 (LED backlighting output circuit short to ground) - is a continuous and on-demand DTC that sets when the SJB detects a short to ground on the LED backlighting output circuit.

This pinpoint test is intended to diagnose the following:

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