Rear Window Defogger Malfunction (C68)

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Diagnostic Instructions

  • Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

  • Review Strategy Based Diagnosis for an overview of the diagnostic approach.

  • Diagnostic Procedure Instructions provides an overview of each diagnostic category.

Diagnosti

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Service Manual Table of Contents

Document Tags

Document Title: Rear Window Defogger Malfunction (C68)

diagnostic

instructions

system

procedure

information

circuit

short

ground

open

resistance

voltage

relay

switch

rear

defog

control

window

defogger

grid

windshield

coil

inoperative

description

pressed

module

illuminates

indicator

switched

reference

connector

operation

testing

scan

tool

ignition

single

replace

khvac

disconnect

test

terminal

greater

specified

range

connect

command

lamp

normal

block

underhood

krrear

verify

jumper

wire

line

middle

terminals

replacement

diagnostic procedure

short voltage

rear window

windshield defogger

relay coil

rear defogger

grid inoperative

circuit system

control module

relay switched

khvac control

ground circuit

circuit open

control circuit

circuit terminal

terminal ground

test lamp

open test

test control

circuit tests

normal test

test replace

resistance circuit

normal replace

krrear defogger

defogger relay

verify test

lamp illuminates

replace krrear

grid line

rear window defogger

defogger grid control

windshield defogger grid

defogger grid ground

rear defogger grid

defogger grid inoperative

hvac control module

illuminates rear window

window defogger indicator

battery positive voltage

relay switched input

operation rear window

control module references

grid windshield defogger

rear defog switch

single defogger grid

window defogger system

replace khvac control

khvac control module

erear window defogger

defogger grid ewindshield

grid ewindshield defogger

ewindshield defogger grid

ground circuit terminal

specified range test

range test ground

test ground circuit

ground circuit open

circuit open resistance

control circuit terminal

circuit terminal ground

command rear defog

rear defog request

defog request scan

request scan tool

scan tool test

tool test lamp

test lamp changing

test lamp circuit

lamp circuit fuse

test control circuit

control circuit short

circuit tests normal

tests normal test

normal test replace

open resistance circuit

resistance circuit tests

tests normal replace

normal replace xafuse

replace xafuse block

xafuse block underhood

circuits test normal

disconnect krrear defogger

krrear defogger relay

verify test lamp

test lamp illuminate

test lamp illuminates

circuit short voltage

fused jumper wire

test lamp test

lamp test control

normal replace khvac

replace krrear defogger

voltage supply grid

test lamp remains

middle grid line

grid line test

line test open

test open test

open test point

specified range replace

range replace krrear

jumper wire relay

wire relay terminal