Chrysler Le Baron, Dodge Dynasty, Plymouth Acclaim. Manual — part 309

helper depresses brake pedal and observes warning
lamp. If lamp fails to light, inspect for a burned out
lamp, disconnected socket, a broken or disconnected
wire at switch.

If lamp is not burned out and wire continuity is

proven, replace brake warning switch in brake line
TEE fitting mounted on frame rail in engine com-
partment below master cylinder (Fig.16).

CAUTION: If wheel cylinder bleeder was opened
check master cylinder fluid level.

SPEEDOMETER SYSTEM

The

vehicles

are

equipped

with

electronically

driven speedometer and odometer assemblies. The
unit has the same appearance as a conventional
speedometer but it eliminates the cable-driven me-
chanical system. A signal is sent from a transmis-
sion-mounted

vehicle

speed

sensor

to

the

speedometer circuitry through the wiring harness.
By eliminating the speedometer cable, instrument
cluster service and removal is improved. Refer to Fig.
17 Speedometer Diagnosis Chart.

When the speedometer is out of calibration. The

electronic automatic transaxle vehicle speed sensor
output must be calibrated to reflect the different

combinations of equipment. The procedure is called
Pinion Factor, refer to Group 21, Transaxle for the
procedure.

Fig. 15 Brake System Warning Lamp Diagnosis

Fig. 16 Brake Warning Lamp Switch

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INSTRUMENT PANEL AND GAUGES

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SPEEDOMETER/ODOMETER ASSEMBLY
REMOVAL

(1) Remove switch pod assembly.
(2) Remove cluster, refer to Cluster Removal.
(3) Remove mask and lens assembly.
(4) Remove tachometer, turbo gauge.
(5) Remove volt, temperature, oil and fuel gauge

assemblies.

(6) Remove the speedometer/odometer assembly

from the cluster housing.

(7) Disconnect pigtail connector from the cluster

printed circuit board.

(8) For installation reverse above procedures. Lis-

ten for the pigtail connector to snap in place.

SPEEDOMETER CIRCUIT TESTING

(1) Using DRB II, check vehicle speed sensor for

speed sensor fault code and for proper speed indica-
tion. Refer to Powertrain Diagnostics Procedure
Manual; Speed Control Test (Fig. 18).

(2) Remove cluster, but do not disconnect cluster

wiring.

(3) With ignition ON check for battery voltage

across the ignition pin and ground pin of speedome-
ter connector.

(4) Check for continuity from vehicle speed sensor

signal pin to connector at speed sensor.

(5) Check cluster to body for continuity to ground.
(6) If all these tests prove good, replace speedome-

ter.

VEHICLE SPEED SENSOR REPLACEMENT

(1) Remove harness connector from sensor and

make sure weather seal is on harness connector.

(2) Remove sensor retaining bolt (Fig. 19).
(3) Pull sensor and pinion gear assembly out of

transaxle. If necessary carefully pry loose with a flat
blade screwdriver (Fig. 20).

(4) Remove pinion gear from sensor.
(5) For installation reverse above procedures. Seat

the sensor assembly by hand to ensure proper gear
engagement. Tighten retaining bolt to 7 N

Im (60 in.

lbs.) torque.

ELECTRONIC AUTOMATIC TRANSAXLE
VEHICLE SPEED SENSOR REPLACEMENT

The output vehicle speed sensor is located to the

left of the manual shift lever.

(1) Raise and support vehicle on safety stands.
(2) Remove vehicle speed sensor (Fig. 21).
(3) For installation, reverse above procedures.

Fig. 17 Speedometer Diagnosis

Fig. 18 Speedometer

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INSTRUMENT PANEL AND GAUGES

8E - 49

VEHICLE SPEED SENSOR TEST

For testing of the vehicle speed sensor and related

components using DRB II, refer to the appropriate
Powertrain Diagnostics Test Procedure Manual.

TACHOMETER DRIVE MODULE REMOVAL

(1) Remove cluster assembly.
(2) Pull tachometer drive module from printed cir-

cuit board (Fig. 22).

(3) For installation reverse above procedures. Use

care when aligning module to printed circuit board.

PRINTED CIRCUIT BOARD REMOVAL

(1) Remove cluster assembly.
(2) Remove mounting screws securing printed cir-

cuit board to cluster housing.

(3) Remove tachometer drive module (Fig. 22).
(4) Twist out all lamp sockets.
(5) For installation reverse above procedures.

CLUSTER LAMPS REMOVAL—MECHANIAL
CLUSTER ONLY

(1) Remove cluster assembly (Fig. 23).
(2) Remove one piece integral lamp and socket

from rear of cluster.

ELECTRONIC CLUSTER

Refer to Body Diagnostic Procedures Manual when

using DRB II.

SELF DIAGNOSTIC SYSTEM

The electronic clusters have an internal diagnostic

routing to isolate problems within the cluster.

Fig. 20 Vehicle Speed Sensor and Speedometer Pinion

Fig. 21 Vehicle Speed Sensor Removal

Fig. 22 Cluster Printed Circuit Board

Fig. 19 Vehicle Speed Sensor and Connector

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INSTRUMENT PANEL AND GAUGES

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Perform cluster Self Diagnostic Test to determine

whether problem is within cluster or outside of clus-
ter.

Refer to Fig. 24 and 25.
Successful completion of the SELF DIAGNOSTIC

TEST indicates that the problem is in the wiring,
connectors or sensors out side of the cluster.

CLUSTER ASSEMBLY REMOVAL

The electronic cluster which is serviced as an as-

sembly is removed with the same procedure as the
conventional cluster.

CONDITION: CLUSTER DISPLAYS DO NOT
ILLUMINATE AFTER VEHICLE IS STARTED

(1) Check fuses and verify battery and ignition

voltage at cluster connector.

(2) Check ground from cluster connector to instru-

ment panel ground stud.

SWITCH AND PANEL COMPONENT SERVICE

HEADLAMP SWITCH

The headlamp switch is located on the left side of

the switch pod. The switch controls the headlamps,
parking lamps, fog lamps and instrument light dim-

ming. If any of the switches require replacement the
entire headlamp switch assembly must be replaced
(Fig. 26 and 27).

REMOVAL

(1) Remove switch pod assembly from the instru-

ment panel. DO NOT attempt to remove instrument
cluster dimmer switch or wiper delay switch knob,
they are not removable.

(2) Remove turn signal switch lever by pulling

straight out of switch pod.

(3) Remove screws from bottom of switch pod.
(4) Separate inner and outer switch pod halves and

remove turn signal switch to gain access to screw.

(5) Remove five inner switch pod panel screws and

3 screws from underneath the switch pod. Separate
the inner bezel from the outer bezel.

(6) Remove switch mounting screws before discon-

necting linkage.

(7) Disconnect switch linkage from buttons. Pull

the linkage straight up from the switch/button to dis-
engage it and remove switch.

Fig. 23 Mechanical Cluster Lamp Location

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INSTRUMENT PANEL AND GAUGES

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