wiring diagram CHEVROLET DYNASTY 1993 Owner's Manual

or bind the transmission range indicator guide tube
and position guide tube in original location.(5) Adjust with tool if necessary to center pointer
on N (Neutral) and check in other gears (Fig. 14). (6) Install upper and lower steering column cover.
(7) Install the rear window defogger bezel and ra-
dio bezel. (8) Install cluster bezel.
(9) Reconnect battery.
REMOVALÐCLUSTER WITHOUT TRANSMISSION RANGE
INDICATOR FROM STEERING COLUMN
(1) Remove cluster bezel (Fig. 10).
(2) Remove four screws attaching cluster to base
panel. (3) Pull cluster rearward carefully, reach behind
and disconnect the two harness connectors. (4) Carefully rotate cluster and remove the two
transmission range indicator screws. (5) Remove cluster assembly.
(6) For installation reverse above procedures. (a) Do not kink guide tube when installing clus-
ter. (b) Replace guide tube behind fuse block.
GAUGES
It is not necessary to remove instrument cluster
from vehicle for gauge replacement. When removing
gauge assemblies from cluster, gauge must be pulled
straight out, not twisted, or damage to gauge pins
may result.
MULTIPLE GAUGE MALFUNCTION
If all the instrument cluster gauges appear to be
malfunctioning, remove the cluster assembly.
² Check for good pin contact
² Check for ignition voltage between the IGN cavity
D and ground.
² If there is ignition voltage
² Check for continuity between the wire harness
ground cavity G and ground.
² If there is continuity, replace the print circuit
board (Fig. 16).
GAUGE INOPERATIVE (FIG. 17 THROUGH 20)
(1) Remove gauge in question.
(2) With the ignition key ON, check for ignition
voltage at ignition pin of gauge. Check for ground at
ground pin of gauge. Refer to the individual gauge
circuit test for proper pin. (a) If no voltage or ground at gauge pins. Check
cavity D red cluster connector for ignition voltage
or cavity G for ground. (b) If no voltage or ground, repair as necessary.
Refer to 8W, Wiring Diagrams.
Fig. 15 Cluster With Mask and Lens Removed
Fig. 14 Transmission Range Indicator Step 4
8E - 28 INSTRUMENT PANEL AND GAUGES Ä

(4) Remove six screws holding the cluster mask
and lens assembly. (5) Pull cluster mask and lens rearward to remove
(Fig. 5 and 6).
(6) For installation reverse above procedures.
CLUSTER ASSEMBLY REMOVAL
(1) Disconnect battery to assure no Air Bag Sys-
tem fault codes are stored. (2) Remove switch pod assembly.
(3) Unscrew tilt column lever if equipped.
(4) Remove steering column trim cover.
(5) Remove attaching screws on cluster and pull
cluster rearward. (6) Tilt cluster to disconnect wiring connections
and turbo gauge hose if equipped, then remove clus-
ter. (7) For installation reverse above procedures.
GAUGES
MULTIPLE GAUGE INOPERATIVE
Volt, speedometer, tachometer and other gauges
appear to malfunction: (1) Remove cluster
(2) Check for ignition voltage at cavity 9 of the red
cluster connector and ground. If no voltage, repair as
necessary (Fig. 7).
(3) Check for ground continuity between cavity 14
of the red cluster connector and ground. If no ground,
repair as necessary. (4) If OK and pins or connectors are not distorted,
replace printed circuit board. (5) Install cluster.
GAUGE CALIBRATION/INOPERATIVE
(1) Remove gauge in question (Fig. 8 through 11).
(2) With the ignition key ON, check for ignition
voltage at ignition pin of gauge and ground. Check
ground pin of gauge for continuity to ground. (a) If no voltage or ground, check at cluster red
connector pin 9 for ignition voltage and pin 14 for
ground. (b) If no voltage or ground, repair as necessary.
Refer to 8W, Wiring Diagrams. (c) If there is voltage or ground, check cluster for
distorted terminals. If terminals are OK, replace
printed circuit board.
Fig. 5 Cluster Mask and Lens
Fig. 6 Cluster with Mask Removed
Fig. 7 Conventional Cluster Connectors
8E - 44 INSTRUMENT PANEL AND GAUGES Ä

(5) Reconnect battery.
GAUGES
CAUTION: During the removal and installation
watch overlays are not damage.
It is not necessary to remove instrument cluster
from vehicle for gauge replacement. When removing gauge assemblies from cluster,
gauge must be pulled straight out, not twisted, or
damage to gauge pins may result.
MULTIPLE GAUGE INOPERATIVE
Volt, speedometer, tachometer and other gauges
appear to malfunction. Also check warning indicator
lamps: (1) Remove cluster
(2) Check for ignition voltage at pin E of the red
connector. If no voltage, repair as necessary (Fig. 8). (3) Check for ground continuity between pin C of
the gray connector. If no ground, repair as necessary. (4) If voltage and ground OK and pins or connec-
tors are not distorted, replace printed circuit board. (5) Install cluster.
SINGLE GAUGE INOPERATIVE (FIG. 9 AND10)
(1) Remove gauge in question. (2) With the ignition key ON, check for ignition
voltage at ignition pin of gauge. Check for ground at
ground pin of gauge. (a) If no voltage or ground, remove cluster and
check pin E red connector for ignition voltage or
pin C gray connector for ground (Fig. 8). (b) If no voltage or ground, repair as necessary.
Refer to 8W, Wiring Diagrams. (c) If there is voltage or ground, check cluster for
distorted terminals. If terminals are OK, replace
printed circuit board.
(3) When testing the temperature gauge, allow the
engine to run until the vehicle reaches a normal op-
erating temperature. Turn ignition OFF and remove
gauge from cluster.
² When checking the temperature and oil pressure
gauges, it is important to have the same engine tem-
perature and engine speed when noting gauge posi-
tion.
² The time between gauge position reading and
sending unit measuring should be kept to a mini-
mum.
² When testing oil pressure gauge, engine needs to
be running. (a) Measure and record the resistance between
sending unit pin and ground pin of the gauge in
question. Refer to Gauge Calibration.
Fig. 7 Upper Instrument Panel Components
Ä INSTRUMENT PANEL AND GAUGES 8E - 61

Electronic vehicle speed control may be tested us-
ing two different methods. One involves use of a
DRB II. If this test method is desired, refer to the
Powertrain Diagnostic Test Procedures for charging
and vehicle speed control manual. The other test method uses a volt/ohm meter and is
described in the following tests. If any information is needed concerning wiring, re-
fer to Group 8W, Wiring Diagrams.
CAUTION: When test probing for voltage or conti-
nuity at electrical connectors, care must be taken
not to damage connector, terminals, or seals. If
these components are damaged, intermittent or
complete system failure may occur.
SERVO ELECTRICAL TESTS
WARNING: ON VEHICLES EQUIPPED WITH AIR-
BAG, SEE GROUP 8M, RESTRAINT SYSTEMS FOR
AIRBAG, STEERING WHEEL OR COLUMN RE-
MOVAL PROCEDURES.
(1) Turn ignition switch to the ON position. With
the vehicle speed control switch in the ON position,
set up a voltmeter to read battery voltage and con-
nect the negative lead to a good chassis ground. (2) Disconnect the four-way connector going to the
servo (Fig. 12). Test pin 2 of the main harness four-
way connector for battery voltage. If not OK go to
step 3. If voltage is OK go to step 4. (3) Perform the following tests.(a) Disconnect the six-way connector at the stop
lamp switch and test pin 1 of the main harness for
battery voltage. If voltage is OK perform the stop
lamp switch test. (b) If the stop lamp switch tests OK; repair wire
between the servo and the stop lamp switch. (c) If no voltage at pin 1 at the 6-way stop lamp
connector, remove the vehicle speed control switch
and disconnect the four-way connector. Test pin 1
of main harness for battery voltage. (d) If voltage is OK perform the vehicle speed
control switch test. (e) If vehicle speed control switch is OK, test
continuity across the clockspring. (f) If clockspring OK, repair as required, wire be-
tween stop lamp switch and clockspring. (g) If no voltage at pin 1 of the 4-way vehicle
speed control switch connector.
² Test for battery voltage between the ignition and
the fuse
² If voltage OK, check fuse
² If fuse OK, repair wire between fuse and clock-
spring
Fig. 7 Vehicle Speed ControlÐAC & AY Bodies with 3.0L
8H - 4 VEHICLE SPEED CONTROL Ä

CONDITION: MOTOR WILL STOP WHEREVER IT IS, WHEN COLUMN SWITCH IS PUT IN OFFPOSITION. THE WIPERS DO NOT CONTINUERUNNING TO PARK POSITION
PROCEDURE
(1) Remove motor wiring connector and clean ter-
minals. Reconnect connector and test motor.If prob-
lem persists, proceed to Step 2. (2) Set wiper switch to OFF position. Disconnect
motor wiring connector. Connect a voltmeter or test
lamp to the motor ground strap. Connect the other
lead to terminal 2 of wiring connector. (a) If voltage is not present, check for an open
circuit in the wiring harness or wiper control
switch. (b) If voltage is present, proceed to step 3.
(3) Connect an ohmmeter or continuity tester be-
tween terminals 3 and 1 (Fig. 14). (a) If there is continuity between these termi-
nals, the problem is a defective motor. (b) If there is no continuity, the problem is an
open circuit in the wiper control switch or wiring
harness.
REAR WIPER MOTORÐAG BODY TEST
The following test is used in order to locate and
then repair liftgate wiper motor defects. Refer to
Group 8W, Wiring Diagrams for liftgate wiper motor
wiring schematic. (1) Remove lower cover on liftgate (Fig. 15).
(2) Disconnect feed connector from wiper motor.
(3) With ignition switch in ON position, check for
battery voltage at blue wire. (4) With ignition switch in ON position and wiper
switch ON, check for battery voltage at blue and
brown wire. If battery voltage is not present in steps
3 and 4, check fuse, liftgate wiper switch and wiring. (5) With ignition switch in ON position, and wiper
switch in OFF position, check for battery voltage be-
tween blue and brown wires. If battery voltage is not
present, check ground wire to liftgate switch. (6) If battery voltage is present in steps 3 and 4,
replace motor.
FRONT WIPER MOTOR ASSEMBLYÐAG and AJ
BODIES
REMOVAL
(1) Park system.
(2) Open the hood assembly.
(3) Remove wiper arms and blades, disconnect
hoses from tee connector (Fig. 16).
Fig. 13 One Jumper Wire Between Terminal 1 and 3. One Jumper Wire Between Terminal 2 and Battery positive
Fig. 14 Ohmmeter Between Terminals 3 and 1
Fig. 15 Liftgate Lower Cover
8K - 6 WINDSHIELD WIPER AND WASHER SYSTEMS Ä

LAMPS
CONTENTS
page page
BULB APPLICATION TABLE ............... 38
CONCEALED HEADLAMPS ................ 27
EXTERIOR LAMP SWITCHES AND HEADLAMP ALIGNMENT ........................... 3
EXTERIOR LAMP SYSTEMS .............. 25
EXTERIOR LAMPSÐAA BODY ............. 7
EXTERIOR LAMPSÐAC BODY ............ 10 EXTERIOR LAMPSÐAG BODY
............ 14
EXTERIOR LAMPSÐAJ BODY ............ 16
EXTERIOR LAMPSÐAP BODY ............ 19
EXTERIOR LAMPSÐAY-BODY ............ 22
GENERAL INFORMATION .................. 1
ILLUMINATED ENTRY SYSTEM ........... 33
GENERAL INFORMATION
Each vehicle is equipped with lamps used for illumi-
nating and indicating purposes. A circuit must have a
good ground to be complete. Circuit ground occurs
when the lamp socket makes contact with the metal
body. On vehicles with plastic lamps, a wire between
the socket and the body makes the grounds. When changing lamp bulbs, check the socket for
corrosion. If corrosion is present, clean contacts with a
wire brush and coat the inside of the socket with
Mopar tMulti-purpose Grease or equivalent.
CAUTION: Do not touch the glass of halogen bulbs
with fingers or any possibly oily surface, reduced
bulb life will result.
BODY IDENTIFICATION
Throughout this Group, references are made to the
vehicle family or body code. To decode the vehicle
identification plates, refer to the Introduction Section
at the front of this manual.
DIAGNOSTIC PROCEDURES
Begin electrical system failure diagnosis by testing
all related fuses and circuit breakers in the fuse block
and engine compartment. When a vehicle experiences problems with the head-
lamp system, verify the condition of the battery con-
nections, charging system, headlamp bulbs, wire con-
nectors, relay, high beam dimmer switch and headlamp
switch. Refer to Wiring Diagrams manual for compo-
nent locations and circuit information.
SYMPTOM
Headlamps are dim when engine is idling of
with ignition turned OFF. Canada cars must
have lamps ON. ACTION
² Clean battery terminal clamps and posts. Refer to
Group 8B, Battery/Starter/Generator Service for
proper procedures.
² Test charging system output. Refer to Group 8A,
Battery/Starting/Charging Systems Diagnostics for
proper testing procedures.
² Test for high resistance in headlamp circuits.
² Defective headlamp bulb.
SYMPTOM
Bulbs burn out frequently.
ACTION
² Test charging system output. Refer to Group 8A,
Battery/Starting/Charging Systems Diagnostics for
proper testing procedures.
² Check for loose or corroded connector terminals or
splices in headlamp circuits. Refer to Wiring Diagrams
manual for component and splice locations.
SYMPTOM
Headlamps are dim with engine running above
idle. Canada cars must have lamps ON.
ACTION
² Test charging system output. Refer to Group 8A,
Battery/Starting/Charging Systems Diagnostics for
proper testing procedures.
² Test for high resistance in headlamp circuits.
² Defective headlamp bulb.
SYMPTOM
Headlamps flash randomly.
ACTION
² Test for poor circuit ground.
² Test for high resistance in headlamp circuits.
Ä LAMPS 8L - 1

² Test condition of headlamp relay.
² Check for loose or corroded connector terminals or
splices in headlamp circuits. Refer to Wiring Dia-
grams manual for component and splice locations.
SYMPTOM
Headlamps do not illuminate.
ACTION
² Test for voltage at headlamp bulbs connectors.
² Test headlamp relay.
² Test headlamp switch.
² Test high-beam headlamp dimmer switch.
² Check for loose or corroded connector terminals or
splices in headlamp circuits. Refer to Wiring Dia-
grams manual for component and splice locations.
FOG LAMP DIAGNOSIS
The fog lamp system receives voltage from the
headlamp relay when the low-beam headlamps are turned ON. The high-beam headlamp dimmer switch
when actuated cancels out voltage feed to the fog
lamp circuit. The fog lamp circuit is protected by a
20 amp fuse located in the fuse panel. Refer to Wir-
ing Diagrams manual for component location and cir-
cuit information.
SYMPTOM
Fog lamps do not illuminate.
ACTION
² Test fog lamp bulb.
² Test for voltage at fog lamp connector.
² Test for proper fog lamp ground.
² Test circuit fuse.
² Test fog lamp switch.
² Test high-beam headlamp dimmer switch.
² Test headlamp relay.
² Test for open circuit in wire harness.
8L - 2 LAMPS Ä

EXTERIOR LAMP SWITCHES AND HEADLAMP ALIGNMENT INDEX
page page
Headlamp Adjustment Using Alignment Screen .... 3
Headlamp Alignment ....................... 3
Headlamp Alignment Preparation .............. 3 Headlamp Dimmer Switch
................... 3
Headlamp Switch .......................... 3
HEADLAMP SWITCH
Service procedures for the headlamp switch can be
found in Group 8E, Instrument Panel and Gauges. More
information can be found in Wiring Diagrams manual.
HEADLAMP DIMMER SWITCH
The headlamp dimmer switch is incorporated into
the turn signal switch. Proper procedures can be found
in Group 8J, Turn Signal and Flashers. More informa-
tion can be found in Group 8W, Wiring Diagrams.
HEADLAMP ALIGNMENT
Headlamps can be aligned using the screen method
provided in this section. Alignment Tool C4466-A or
equivalent can also be used. Refer to instructions
provided with the tool for proper procedures. The
preferred headlamp alignment setting is 0 for the
left/right adjustment and 0 for the up/down ad-
justment.
HEADLAMP ALIGNMENT PREPARATION
(1) Verify headlamp dimmer switch and high beam
indicator operation. (2) Inspect and correct damaged or defective compo-
nents that could interfere with proper headlamp align-
ment. (3) Verify proper tire inflation.
(4) Clean headlamp lenses.
(5) Verify that luggage area is not heavily loaded.
(6) Fuel tank should be FULL. Add 2.94 kg (6.5 lbs.)
of weight over the fuel tank for each estimated gallon of
missing fuel.
HEADLAMP ADJUSTMENT USING ALIGNMENT
SCREEN
ALIGNMENT SCREEN PREPARATION (FIG. 1 AND 2)
(1) Position vehicle on a level surface perpendicular
to a flat wall 7.62 meters (25 ft) away from front of
headlamp lens. (2) If necessary, tape a line on the floor 7.62 meters
(25 ft) away from and parallel to the wall.
(3) From the floor up 1.27 meters (5 ft), tape a line on
the wall at the centerline of the vehicle. Sight along the
centerline of the vehicle (from rear of vehicle forward) to
verify accuracy of the line placement.
(4) Rock vehicle side-to-side three times to allow
suspension to stabilize. (5) Jounce front suspension three times by pushing
downward on front bumper and releasing. (6) Measure the distance from the center of head-
lamp lens to the floor. Transfer measurement to the
alignment screen (with tape). Use this line for up/down
adjustment reference. (7) Measure distance from the centerline of the ve-
hicle to the center of each headlamp being aligned.
Transfer measurements to screen (with tape) to each
side of vehicle centerline. Use these lines for left/right
adjustment reference.
HEADLAMP ADJUSTMENT (FIG. 3, 4, 5, 6 OR 7)
A properly aimed low beam headlamp will project the
top edge of low beam hot spot on the alignment screen
from 50 mm (2 in.) above to 50 mm (2 in.) below the
headlamp centerline. The side-to-side left edge of low
beam hot spot should be from 50 mm (2 in.) left to
50mm (2 in.) right of headlamp centerline (Fig. 1). The
preferred headlamp alignment is 0 for the
up/down adjustment and 0 for the left/right ad-
justment. The high beams on a vehicle with aero
headlamps cannot be aligned. The high beam pattern
should be correct when the low beams are aligned
properly. To adjust headlamp alignment, rotate alignment
screws to achieve the specified low beam hot spot
pattern.
CAUTION: Do not cover an illuminated headlamp for
more then 15 seconds. Lamp will overheat and burn
or melt cover.
To adjust headlamps, rotate alignment screws to
achieve the specified high intensity pattern (Fig. 1 or
2).
FOG LAMP ALIGNMENT (FIG. 8)
Prepare an alignment screen. Refer to Alignment
Screen Preparation paragraph in this section. A prop-
erly aligned fog lamp will project a pattern on the
alignment screen 100 mm (4 in.) below the fog lamp
centerline and straight ahead.
Ä LAMPS 8L - 3

EXTERIOR LAMPSÐAC BODY INDEX
page page
Aero Headlamp Bulb ...................... 10
Aero Headlamp Housing ................... 11
Aero HeadlampsÐAC/D-Body ............... 10
Center High Mounted Stop Lamp (CHMSL) ..... 13
Center High-Mounted Stop Lamp (CHMSL) Bulb . 13
Cornering Lamp Assembly .................. 12
Cornering Lamp Bulb ..................... 12
Front Side Marker BulbÐAC/C-Body .......... 12
Front Side Marker LampÐAC/C-Body ......... 12
Headlamp Diagnosis ...................... 10 Headlamp Sealed BeamÐAC/C Body
......... 10
License Plate Lamp/Bulb ................... 13
Park/Turn Signal Lamp or BulbÐAC/C-Body .... 11
Park/Turn Signal Lamp or BulbÐAC/D-Body .... 11
Rear Side Marker Lamp BulbÐAC/C-Body ..... 13
Rear Side Marker LampÐAC/C-Body ......... 13
Tail, Stop, Turn Signal, Back-Up and Side Marker LampÐAC/D-Body ...................... 12
Tail, Stop, Turn Signal, Back-Up LampÐAC/C or AY/S-Body ............................ 12
HEADLAMP DIAGNOSIS
Refer to the Headlamp Diagnosis at the beginning of
this Group. Refer to Wiring Diagrams Manual for
circuit and component locations.
HEADLAMP SEALED BEAMÐAC/C BODY
REMOVAL
(1) Turn the headlight switch ON.
(2) Open the hood and locate the Power Distribution
Center forward of the left front suspension tower (Fig.
1). Remove the cover. (3) Remove the Headlamp Close Relay (Fig. 2) to
prevent the headlamp doors from closing. (4) Turn the headlight switch OFF.
(5) Remove screws from headlamp bezel and remove
bezel, if equipped. (6) Remove screws from interior retaining ring (Fig.
3), and remove ring. Do not disturb the headlamp adjusting screws.
(7) Pull out sealed beam unit and unplug connector.
INSTALLATION
Reverse the preceding operation.
AERO HEADLAMPSÐAC/D-BODY
Lens fogging is a normal condition and does
not require service, as moisture will vent from
tubes behind the lens.
AERO HEADLAMP BULB
REMOVAL (FIG. 4)
(1) Locate and remove the wire connector behind the
headlamp assembly in the engine compartment.
CAUTION: Do not touch the bulb with fingers or any
possibly oily surface, reduced bulb life will result. (2) Rotate the bulb retaining ring counterclockwise
one quarter turn and remove the ring, bulb and bulb
holder from the lens assembly. The bulb holder has
alignment notches.
INSTALLATION
Reverse the preceding operation.
Fig. 1 Power Distribution Center
Fig. 2 Headlamp Close Relay
8L - 10 LAMPS Ä

EXTERIOR LAMPSÐAP BODY INDEX
page page
Center High Mounted Stop Lamp (CHMSL)Ð AP/24-44-Body ......................... 21
Center High Mounted Stop Lamp BulbÐ AP/24-44-Body ......................... 21
Fog Lamp Bulb .......................... 21
Fog Lamps ............................. 21
Front Side Marker Lamp or Bulb ............. 20
Headlamp Bulb .......................... 19 Headlamp Diagnosis
...................... 19
Headlamp Housing ....................... 19
License Plate Lamp or Bulb ................ 20
Park and Turn Signal Lamp or Bulb .......... 20
Tail, Stop, Turn Signal, Back-Up and Side Marker Lamp ................................ 20
Tail, Stop, Turn Signal, Back-Up and Side Marker Lamp Bulbs ........................... 20
HEADLAMP DIAGNOSIS
For headlamp diagnosis, refer to the headlamp di-
agnosis chart at the beginning of this group. Refer to
Wiring Diagrams manual for circuit and component
locations.
HEADLAMP BULB
REMOVAL (FIG. 1)
(1) Left front bulb removal: Remove the windshield
washer reservoir upper mounting screw and position
reservoir rearward. (2) Disconnect wire connector from back of head-
lamp behind radiator closure panel.
CAUTION: Do not touch the bulb glass with fingers
or other oily surface, reduced bulb life will result.
(3) Rotate the bulb retaining ring counterclockwise
one quarter turn and remove the ring, bulb holder
and bulb from the lens assembly. The bulb holder
has alignment notches.
INSTALLATION
Reverse the preceding operation.
HEADLAMP HOUSING
RIGHT HEADLAMP REMOVAL (FIG. 1)
To remove the aero headlamp housing, perform
steps 1, 2 and 3 of bulb removal operation and pro-
ceed with the following steps. (1) From in the engine compartment, remove the
three headlamp assembly to body attaching nuts and
separate the lamp from the body. (2) Pull headlamp/lens assembly forward.
(3) Pull the lower section of the headlamp adjuster
cable from the lamp adjuster screw.
(4) Remove headlamp/lens assembly.
(5) Remove the four lamp/lens to headlamp bucket
screws. (6) Remove headlamp/lens.
INSTALLATION
Reverse the preceding operation.
LEFT HEADLAMP REMOVAL (FIG. 1)
(1) Disconnect battery cables, negative first, and
remove battery. (2) Remove the windshield washer reservoir upper
mounting screw and position reservoir rearward. (3) Remove the air cleaner intake tube.
(4) Remove screws holding Engine Controller to in-
ner fender flange. (5) Move Engine Controller rearward, leave wires
connected. (6) Remove air duct from front of Engine Control-
ler. (7) Disconnect wire connector from back of head-
lamp. (8) From in the engine compartment, remove nuts
holding headlamp housing to radiator closure panel. (9) Separate headlamp housing from radiator clo-
sure panel. (10) Pull headlamp housing forward.
(11) Pull the lower section of the headlamp ad-
juster cable from the lamp adjuster screw. (12) Separate headlamp from vehicle.
INSTALLATION
Reverse the preceding operation.
Fig. 1 Aero Headlamp
Ä LAMPS 8L - 19