Jeep 1997 Grand Cherokee Service Manual page 595

FORWARD FACING SENSOR SWITCH
ZG
DIAGNOSIS AND TESTING (Continued)
Fig. 1 Automatic Day/Night Mirror
(5) Turn the ignition switch to the On position. Set
the parking brake. Place the transmission gear selec-
tor lever in the Reverse position. Check for battery
voltage at the backup lamp switch output circuit cav-
ity of the mirror wire harness connector. If OK, plug
in the mirror wire harness connector and go to Step
6. If not OK, repair the open circuit as required.
(6) Place the transmission gear selector lever in
the Neutral position. Place the mirror switch in the
On (LED in the switch is lighted) position. Cover the
forward facing ambient photocell sensor to keep out
any ambient light.
NOTE: The ambient photocell sensor must be cov-
ered completely, so that no light reaches the sen-
sor. Use a finger pressed tightly against the sensor,
or cover the sensor completely with electrical tape.
(7) Shine a light into the rearward facing head-
lamp photocell sensor. The mirror should darken. If
OK, go to Step 8. If not OK, replace the faulty mirror
unit.
(8) With the mirror darkened, place the transmis-
sion gear selector lever in the Reverse position. The
REAR FACING SENSOR CONNECTOR
POWER MIRROR SYSTEMS
mirror should return to its normal reflectance. If not
OK, replace the faulty mirror unit.
REMOVAL AND INSTALLATION
AUTOMATIC DAY/NIGHT MIRROR
(1) Disconnect and isolate the battery negative
cable.
ON/OFF SWITCH
(2) If so equipped, remove the wire harness cover
by grasping the lower portion of the cover and sliding
it into the upper portion and off of the mirror base
(Fig. 2).
Fig. 2 Automatic Day/Night Mirror Remove/Install-
(3) Unplug the wire harness connector from the
mirror.
(4) Remove the set screw that secures the mirror
to the windshield support button.
(5) Push the mirror up far enough to clear the sup-
port button and remove the mirror.
(6) Reverse the removal procedures to install.
ELECTRICAL CONNECTOR RELEASE TAB
Typical
8T - 7