ZJ POWER MIRRORS 8T - 1 POWER MIRRORS CONTENTS page pageDIAGNOSIS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 SERVICE PROCEDURES ................... 4GENERAL INFORMATION . . . . . . . . . . . . . . . . . . 1 GENERAL INFORMATION This group covers power outside mirrors and theautomatic day/night inside rear view mirror, whichare available options on Grand Cherokee models. Fol-lowing are general descriptions of the major compo-nents in the power outside mirror and automatic day/night inside rear view mirror systems. Refer toGroup 8W - Wiring Diagrams for complete circuit de-scriptions and diagrams.POWER MIRROR The power mirrors are connected to battery feed atall times. Each mirror head contains two electric mo-tors, two drive mechanisms and the mirror glass.One motor and drive controls mirror up-and-downmovement, and the other controls right-and-leftmovement. The mirror glass is the only serviced replacementpart for the power mirror assembly. If any other com-ponent of the mirror unit is faulty or damaged, theentire assembly must be replaced.HEATED MIRROR The heated mirror option is controlled by the rearwindow defogger switch. The heater elements in themirror are activated only when the rear window de-fogger switch is in the ON position. Refer to Group8N - Rear Window Defogger for diagnosis of this sys-tem. Fig. 1 Power Mirror Switch AUTOMATIC DAY/NIGHT MIRRORPOWER MIRROR SWITCH The automatic day/night mirror automatically Both the right and left mirror are controlled by a changes its reflectance to reduce glare in all types ofmulti-function switch located on the lower left end of driving conditions. A thin layer of electrochromic ma-the instrument panel, directly below the left spot terial between two pieces of conductive glass makecooler (Fig. 1). The selector switch is moved right up the face of the mirror. As light conditions change,(right mirror control), left (left mirror control), or two photocell sensors adjust the reflectance while re-center to turn power mirrors off. Then one of four di- ducing glare from headlamps approaching from therectional control buttons is depressed to control rear.movement of the selected mirror up, down, right, or The mirror incorporates 2 sensors. The ambientleft. The power mirror switch is serviced only as a sensor (forward facing) detects normal outside lightcomplete unit. levels. The headlamp sensor (rear facing) detects
8T - 2 POWER MIRRORS ZJlight levels received at the rear window side of the only operate when the ignition switch is in the ONmirror. When the difference between the two levels position. The mirror also senses the back-up lampbecomes too great (light level received at rear of mir- circuit and turns off whenever the transmissionror is much higher than front of mirror), the mirror (manual or automatic) is in reverse.begins to darken. The automatic day/night mirror can not be re- The mirror switch controls whether the automatic paired. If faulty, the entire assembly must be re-dimming feature is on or off. When on is selected, the placed.switch is lighted by an integral LED. The mirror will DIAGNOSISPOWER MIRRORS (1) Remove the door trim panel as described inPower Mirror Remove/Install. (2) Unplug power mirror door wiring harness con-nector. (3) Connect a jumper wire to a 12-volt source. (4) Connect another jumper wire to a good bodyground. (5) Refer to Power Mirror Motor Test for appropri-ate pin numbers (Fig. 2). Fig. 3 Power Mirror Switch Test Fig. 2 Power Mirror Motor Test (4) Turn ignition switch to OFF position. Check forPOWER MIRROR SWITCH continuity between connector cavity with black wire (1) Remove power mirror switch from mounting po-sition. (2) Unplug wiring harness connector. (3) Using an ohmmeter, test for continuity betweenthe terminals of the switch as shown in the PowerMirror Switch Test (Fig. 3).AUTOMATIC DAY/NIGHT MIRROR (1) Check fuse 19 in fuseblock module. If OK, go tonext step. If not OK, replace fuse. (2) Turn ignition switch to the ON position. Checkfor battery voltage at fuse 19 in fuseblock module. IfOK, go to next step. If not OK, repair circuit fromfuse to ignition switch as required. (3) Unplug harness connector from mirror (Fig. 4).With ignition switch ON, check for battery voltage atconnector cavity with yellow wire. If OK, go to nextstep. If not OK, repair circuit to fuse 19 as required. Fig. 4 Automatic Rear View Mirror
ZJ POWER MIRRORS 8T - 3 POWER MIRROR SCHEMATICand a good ground. There should be continuity. If bient light. Light sensor must be covered com-OK, go to next step. If not OK, repair circuit to pletely so that no light reaches the sensor. Useground as required. only one finger pressed tightly against sensor, (5) Turn ignition switch to ON position. Set park- or cover sensor completely with electrical tape.ing brake. Place transmission gear selector in Re- (7) Shine a light into the rear facing sensor. Theverse position. Check for battery voltage at connector mirror should darken. If OK, go to next step. If notcavity with brown/light green wire. If OK, plug mir- OK, replace mirrorror connector back in and go to next step. If not OK, (8) With the mirror darkened, place the transmis-repair circuit to back-up lamps as required. sion gear selector in Reverse. The mirror should re- (6) Place transmission gear selector in Neutral. turn to its normal condition. If not OK, replacePlace mirror switch in ON (switch lighted) position. mirror.Cover the forward facing sensor to keep out any am-
8T - 4 POWER MIRRORS ZJ SERVICE PROCEDURESPOWER MIRROR SWITCH REMOVE/INSTALL (1) Disconnect battery negative cable. (2) Remove ash receiver. (3) Remove 6 screws holding instrument panel cen-ter bezel (Fig. 5). Fig. 6 Upper Dash Pad Attaching Screws Fig. 7 Cluster to Dash Pad Screws Fig. 5 Instrument Panel Center Bezel (4) Remove center bezel. (5) Remove 2 screws holding dash pad located be-hind top of center bezel. (6) Gently pry defroster grille out of dash pad. (7) Unplug auto headlamp and/or solar sensors (ifequipped) and set defroster grille aside. (8) Remove 4 screws in defroster duct openingholding dash pad (Fig. 6). (9) Remove 3 screws above instrument panel clus-ter holding dash pad (Fig. 7). (10) Open glove box and remove 2 screws holdingdash pad. (11) Remove dash pad by pulling up to unsnap end Fig. 8 Steering Column Coverclips. (14) Remove 1 screw from bottom of lower instru- (12) Remove 4 screws holding the steering column ment panel trim and pull panel off. There is also acover (Fig. 8). clip holding the panel to the instrument panel. (13) With left front door open, remove 1 screw from (15) Remove 1 screw holding top of mirror switchthe side of the lower instrument panel trim (Fig. 9). bezel (Fig. 10).
ZJ POWER MIRRORS 8T - 5 Fig. 11 Power Mirror Bezel Bottom Screw Fig. 9 Lower Instrument Panel Trim Fig. 10 Power Mirror Bezel Top Screw (16) Remove 1 screw holding bottom of bezel (Fig. Fig. 12 Power Mirror Switch Remove11). Remove the mirror switch bezel far enough to (4) Remove screw from under door armrest.unplug connector. (5) Remove screw from bottom of hand hold in door (17) Depress locking tabs and remove switch from armrest.bezel (Fig. 12). (18) Reverse removal procedures to install. CAUTION: The wiring harness to the door switches is just long enough to allow installation. If trimPOWER MIRROR REMOVE/INSTALL panel is pulled off by hand the switches may be (1) Remove screw at top of door trim panel near pulled apart. Use a door clip tool to prevent damag-mirror (Fig. 13). ing the switches. (2) Remove screw from demister opening. (3) Remove screw and door handle cover.
8T - 6 POWER MIRRORS ZJ Fig. 15 Power Mirror Remove/Install Fig. 13 Door Trim Panel Remove AUTOMATIC DAY/NIGHT MIRROR REMOVE/ (6) Remove the door trim panel with a wide, flat- INSTALLbladed tool (Fig. 14). (1) Remove wire cover by grasping lower portion of To aid in removal of the trim panel, start at wire cover and sliding into upper portion and off ofthe bottom of the panel. mirror base (Fig. 16). Fig. 14 Door Trim Panel Remove Fig. 16 Automatic Rear View Mirror Remove/Install (7) Unplug mirror wiring from door harness at con- (2) Unplug connector behind mirror.nector (Fig. 15). (3) Remove screw holding mirror to windshield. (8) Remove 3 nuts holding mirror to door panel (4) Push mirror up far enough to clear the supportand remove mirror. and remove mirror. (9) Reverse removal procedures to install. (5) Reverse removal procedures to install.