DTC P21A Ford

Headlamp Switch Input Signals Correlation Malfunction

Headlamp Switch Input Signals Correlation Malfunction

Description

Battery voltage must be between 9-16 V.

Cause and Solution

The BCM detects an open high resistance in the turn signal multifunction switch park lamps ON signal circuit.The BCM detects a short to ground in the turn signal multifunction switch headlamps ON signal circuit.The BCM detects a short to ground in the turn signal multifunction switch headlamps OFF signal circuit.

Video Guide

Duration: PT4M9S | Uploaded: 2020-06-29

Diagnostic Info

  • DTC Code: P21A
  • Brand: Ford
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