Файл: 92FWD_8R.pdf

GENERAL INFORMATION

Power seats can be adjusted in six different directions up, down, forward, back, tilt forward, or tilt rearward.

A three armature permanent magnet reversible motor is coupled through cables to worm gear box assemblies located in the seat tracks, providing the various seat movements.

The electrical circuit is protected by a 30 amp circuit breaker located on the fuse block.

TEST PROCEDURES

Before any testing is attempted the battery should be carefully charged and all connections and terminals cleaned and tightened to insure proper continuity and grounds.

With dome lamp on, apply switch in direction of failure. If dome lamp dims the seat motor is trying to work indicating mechanical jamming. If dome lamp does not dim, then proceed with the following electrical tests.

CIRCUIT BREAKER TEST

Find correct circuit breaker on fuse block. Pull out slightly but be sure that circuit breaker terminals still contact terminals in fuse block. Connect ground wire of voltmeter to a good ground. With probe of voltmeter positive wire, check both terminals of circuit breaker for battery voltage. If only one terminal checks at battery voltage, circuit breaker is defective and must be replaced. If neither terminal shows battery voltage, check for open or shorted circuit to circuit breaker.

HARNESS VOLTAGE TEST

The following test will determine whether or not voltage is continuous through the body harness to the switch.

(1)Remove power seat switch from mounting position and disconnect switch from wiring harness.

(2)Connect one lead of test light to ground terminal, black wire (BK) of center section, and touch other test light lead to red wire (RD) terminal.

(3)If test light comes on, harness to switch is good. If test light does not come on, perform circuit breaker test.

MOTOR TESTS

AABODY

(1)Remove switch from mounting position and disconnect from harness.

(2)To check the center motor, connect a jumper wire between pin 5 and pin 3 (Fig. 1). Connect a second jumper wire between pin 7 and pin 4. If motor does not operate, reverse the jumpers, pin 5 to pin 4 and pin 7 to pin 3. If motor still does not operate check wiring between switch connector and motor assembly. If wiring checks good replace motor assembly.

(3)To check the front motor, connect a jumper wire between pin 5 and pin 1 (Fig. 1). Connect a second jumper wire between pin 7 and pin 8. If motor does not operate, reverse the jumpers, pin 5 to pin 8 and pin 7 to pin 1. If motor still does not operate check wiring between switch connector and motor assembly. If wiring checks good replace motor assembly.

(4)To check the rear motor, connect a covered jumper wire between pin 5 and pin 6 (Fig. 1). Con-

Fig. 1 Power Seat Switch Connector±AA Body

nect a second jumper wire between pin 7 and 2. If motor does not operate, reverse the jumpers, pin 5 to pin 2 and pin 7 to 6. If motor still does not operate check wiring between switch connector and motor assembly. If wiring checks good replace motor assembly.

(5) If all motors and the seat operate properly, perform Switch Test.

AG & AJ BODIES

(1)Remove switch from mounting position and disconnect from harness.

(2)To check the front motor, connect a jumper wire between cavity number 2 and cavity number 9 (Fig. 2). Connect a second jumper wire between cavity number 6 and cavity number 5. If the motor does not operate, reverse the jumpers, 2 to 5 and 6 to 9. If motor still does not operate check wiring between switch connector and motor assembly. If wiring checks good replace motor assembly.

(3)To check the center motor, connect a jumper wire between cavity number 2 and cavity number 8. Connect a second jumper wire between cavity 6 and cavity number 7. If the motor does not operate, reverse the jumpers, 2 to 7 and 6 to 8. If motor still does not operate check wiring between switch connector and motor assembly. If wiring checks good replace motor assembly.

(4)To check the rear motor, connect a jumper between cavity number 2 and cavity number 10. Connect a second jumper wire between cavity number 6 and cavity number 3. If the motor does not operate, reverse the jumpers, 2 to 3 and 6 to 10. If motor still does not operate, check wiring between switch connector and motor assembly. If wiring checks good replace motor assembly.

(5)To check the seatback recliner motor if equipped, connect a jumper wire between cavity number 2 and cavity number 1. Connect a second jumper wire between cavity number 6 and cavity number 11.

Fig. 2 Power Seat Switch Connector±AG & AJ

Bodies

If the motor does not operate, reverse the jumpers (2 to 11 and 6 to 1). If motor still does not operate check wiring between switch connector and motor assembly. If wiring checks good replace motor assembly.

(6) If all motors and the seat operate properly, perform Switch Test.

AC AND AY BODIES

The following tests do not apply to left seat on vehicles equipped with memory mirrors/seats. Refer to test procedures for power memory mirrors/seats in this section.

(1)Remove switch from mounting position and disconnect from harness.

(2)To check the front motor, connect a jumper wire between cavity number 3 and cavity number 8 (Fig. 3 and 4). Connect a second jumper wire between cavity number 6 and cavity number 7. If the motor does not operate, reverse the jumpers, 3 to 7 and 6 to 8. If the motor still does not operate check the wiring between switch connector and motor assembly. If wiring checks good replace motor assembly.

(3)To check the center motor, connect a jumper wire between cavity number 3 and cavity number 5. Connect a second jumper wire between cavity number 6 and cavity number 2. If the motor does not operate, reverse the jumpers, 3 to 2 and 6 to 5. If the

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Fig. 3 Left Power Seat Switch±AC & AY Bodies

motor still does not operate check the wiring between switch connector and motor assembly. If wiring checks good replace motor assembly.

(4)To check the rear motor, connect a jumper wire between cavity number 3 and cavity number 4. Connect a second jumper wire between cavity number 6 and cavity number 13. If the motor does not operate, reverse the jumpers, 3 to 13 and 6 to 4. If the motor still does not operate check the wiring between switch connector and motor assembly. If wiring checks good replace motor assembly.

(5)If all motors and the seat operate properly, perform Switch Test.

POWER SEATS 8R - 3

Fig. 4 Right Power Seat Switch±AC & AY Bodies

SWITCH TEST

To check the switch, remove the switch from its mounting position. Using an ohmmeter, perform switch continuity test (Fig. 5, 6 and 7). If there is no continuity at any one of the switch positions, replace the switch.

SEAT ASSEMBLY

REMOVAL

(1)Remove adjuster attaching bolts and nuts from floor pan. Move adjuster as required for access.

(2)Disconnect battery negative cable.

(3)Disconnect wiring harness power lead at carpet.

(4)Remove assembly from vehicle.

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HORIZONTAL AND VERTICAL TRANSMISSIONS

Transmissions are not removable and no maintenance is required. If transmission fails replace entire seat adjuster assembly.

ADJUSTER

REMOVAL

(1)Remove seat assembly from vehicle following procedure outlined under Seat Assembly Removal.

(2)Lay seat on its back on some clean surface.

(3)Remove bolts attaching adjuster to seat assembly (Fig. 8 through 11).

(4)Disconnect wiring harness at switch if seat mounted switch is used.

(5)Remove tie straps holding cable housing to seat for power bench seat adjuster only.

INSTALLATION

(1)Lay seat on its back on a clean surface.

(2)Position adjuster to seat assembly and install attaching bolts.

(3)Connect wiring harness at switch and replace tie straps where removed.

(4)Install seat following procedure outlined under Seat Assembly Installation.

POWER SEATS 8R - 5

Fig. 8 Seat Adjuster±AC and AJ Bodies

MOTOR

REMOVAL

Anytime the motor, cable and housing assemblies, or vertical and horizontal transmission assemblies, require maintenance, the assemblies must be synchronized to insure easy and proper operation.

Fig. 11 Seat Adjuster±AG Body

(1)Remove seat assembly from vehicle following procedure outlined under Seat Assembly Removal (Fig. 8 through 11).

(2)Lay seat assembly on its back on a clean sur-

face.

(3)Remove motor mounting screws.

(4)Carefully disconnect housing and cables from motor assembly.

INSTALLATION

(1) Place motor assembly into position.

(2)Carefully connect cables and housings to motor assembly.

(3)Install mounting screws.

(4)Install bolt holding motor assembly to adjuster.

(5)Install seat following procedure outlined under Seat Assembly Installation.

ENTHUSIAST SEAT

AG and AJ body vehicles have, as an option, a special enthusiast seat package. The seat includes not only the normal six-way power seat adjuster, but also special lumbar air filled support bag and adjustable seat back side wings (Fig. 12). These mechanisms are adjusted by a switch located on the right side seat wing. Refer to Owner Manual supplied with vehicle for complete instructions for seat operation.

SWITCH TEST

For switch testing, remove switch from its mounting location. Using an ohmmeter, refer to Figures 13 and 14 to determine if continuity is correct. If these results are not obtained, replace the switch.

SWITCH REPLACEMENT REMOVAL

(1)Remove left cushion side shield.

(2)Disconnect wiring from switch.

(3)Depress bezel retainers and push switch from

bezel.

(4)For installation, reverse above procedure.