Auxiliary Video Display is Poor or Blank

Auxiliary Video Display is Poor or Blank

Diagnostic System Check - Radio,Stereo, and Compact Disc

Perform the Diagnostic System Check - Vehicle before proceeding with these diagnostic procedures. Refer to Diagnostic System Check - Vehicle. Initial Inspection and Diagnostic Overview

Auxiliary Video Display is Poor or Blank

Important: The following information lists the most probable cause of the concern to the least probable cause, followed by the appropriate test for the condition. If the list leads to the replacement of a component, always inspect for a poor connection before proceeding with the replacement. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Diagnostic Aids. Component Tests and General Diagnostics

* Auxiliary detect signal circuit open, shorted to ground, or shorted to battery positive-Test auxiliary detect signal circuit for resistance to ground with key in OFF position. With no auxiliary device connected to red RCA input jack, resistance to ground should be 270K ohms. With auxiliary device connected to red RCA input jack, resistance to ground should be 50K ohms. If resistance values are not correct, check for open, short to battery positive, or short to ground on auxiliary detect signal circuit. Refer to Circuit Testing and Wiring Repairs in Diagnostic Aids. Component Tests and General Diagnostics
* Auxiliary Control Signal circuit open or shorted to battery positive-Test the Auxiliary Control circuit from the radio for an open or a short to battery positive. Refer to Circuit Testing and Wiring Repairs in Diagnostic Aids. Component Tests and General Diagnostics
* Overhead console faulty-Test Auxiliary Detect signal circuit for resistance to ground with key in off position. With no auxiliary device connected to red RCA input jack, resistance to ground should be 270K ohms. With auxiliary device connected to red RCA input jack, resistance to ground should be 50K ohms. If resistance values are not correct, check for open, short to battery positive, or short to ground on auxiliary detect signal circuit. Replace overhead console.
* Radio faulty-Replace radio. Refer to Radio Replacement.