TEST
ACTION
APPLICABILITY
9
Turn the ignition off.
Disconnect the Instrument Cluster C2 connector.
Disconnect the Rear Window Defogger Switch connector.
Turn the ignition on.
Measure voltage between the Rear Window Defogger Switch Sense Circuit and
ground.
Is any voltage present?
All
Yes
→ Repair the Rear Window Switch Sense Circuit for a short to
voltage condition.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 10
10
Turn the ignition off.
Disconnect the Instrument Cluster C2 connector.
Disconnect the Rear Window Defogger Switch connector.
Measure resistance between ground and the Rear Window Defogger Switch Sense
Circuit.
Is the resistance below 5.0 ohms?
All
Yes
→ Repair the Rear Window Defogger Switch Sense Circuit for a
short to ground condition.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 11
11
Turn the ignition off.
Disconnect the Instrument Cluster C2 connector.
Disconnect the Rear Window Defogger Switch.
Measure resistance of the Rear Window Defogger Switch Sense circuit from the
Instrument Cluster C2 connector to the Defogger switch connector.
Is the resistance below 5.0 ohms?
All
Yes
→ Go To 12
No
→ Repair the Rear Window Defogger Switch Sense Circuit for an
open condition.
Perform BODY VERIFICATION TEST - VER 1.
12
Turn the ignition off.
Reinstall the Rear Window Defogger Relay.
Reconnect the Instrument Cluster C2 connector.
Disconnect the Rear Window Defogger Switch connector.
Turn the ignition on.
Connect a jumper wire between the Rear Window Defogger Switch Sense circuit in
the Defogger Switch connector to ground and listen for the relay to click.
Does the Defogger Relay click?
All
Yes
→ Replace the Rear Window Defogger Switch.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Replace the Instrument Cluster.
Perform BODY VERIFICATION TEST - VER 1.
129
ELECTRICALLY HEATED SYSTEMS
*REAR WINDOW DEFOGGER INOPERATIVE —
Continued