1973 OPEL GT-R clock

j
/lA- 61973 OPEL SERVICE MANUAL
Do not overfill, as electrolyte may
be sprayed out by
gassing or may overtlow due to heat expansion dur:
ing charging.
If distilled water is not available, it is better to add
clean, mineral-free tap water than to allow the
elec2trolyte level to remain below the top of the plates:
In freezing weather the water should be added just
before using the car or otherwise charging the bat-
tery so that the water will be mixed with the acid
before it is allowed to stand in freezing temperatures.
If it is found necessary to add water to the
batterimore frequently than about every
1,ooO miles and the
quantity of water added per cell is’ excessive, check
setting of voltage regulator and adjust, if necessary:
Abnormal water loss is an indication that the battery
is being overcharged.
Inspect Battery, Mounting and Cables
Check outside of battery for damage or signs of se&ous abuse such as broken case or broken covers:
Check inside of battery by removing the vent caps
and inspecting for signs of abuse
stich as electrolyte
level too low to see, or bad or unusual odors. If
battery shows signs of serious damage or abuse, it
should be replaced.
Check the battery hold down bolts to make certain
that battery is securely held in place. The nut should
be drawn up to 20 lbs. in.;excessjve tightening may
distort or crack the battery case.If the top of battery is dirty or the hold down str?e
is corroded, clean thoroughly with a brush dipped
IFammonia or soda solution. Care must be used td
prevent any solution from getting into battery
cellslAfter the foaming of solution stops, flush off witli
clean water and dry thoroughly. If hold down strap
is corroded it should be painted with acid-resisting
paint after cleaning.
Check battery cables to make certain they are tight
at bracket and junction block. If a connection is
found loose it should be cleaned before being tight;ened as arcing and corrosion may have taken place
in the loose connection. Check condition of cables
and replace if badly corroded or frayed.
Special attention must be given to,the battery posi-
tive cable position to eliminate the possibility of con-
tact with the exhaust manifold on the 1.1 liter engine.
The cable clamp must be rotated clockwise as neces-
sary for the cable to run at a 45 degree angle toward
the right wheelhouse panel.
Cleaning Cable Terminals
If loose connections are found by inspection, or highresistance is found by voltage test, disconnect the
cable for thorough cleaning of terminals. When
removing a corroded cable terminal from battery
post, do not pry against battery case or hammer on
terminal to break it loose, since either practice will
result in broken cell covers. Use a screw-type termi-
nal puller if terminal cannot be loosened by hand.
Thoroughly clean all corrosion from disconnected
battery cable terminals and terminal posts, using
suitable wire brushes. If wire brushes are not availa-
ble, corroded terminals may be cleaned by brushing
with a strong soda solution, using care not to get
solution into battery cells.
If
cabbz strands are broken, corroded, or loose in
terminals, the cable should be replaced with the cor-
rect cable to insure ample capacity.
To prevent corrosion of battery terminals and con-
nections, apply a coating of petroleum jelly over the
battery post and cable terminals after cables have
been installed on terminals.
421 BATTERY TEST421 Battery Testers, manufactured and sold by a
number of companies, are the only battery testers
approved by Delco-Remy Division for testing one-
piece cover batteries. They are also used by United
Motors Service to determine whether or not a battery
is defective.
Figure lA-3 421 Battery Tester-Charger
The
42,l Battery Tester shows, in a few minutes, the
state-of-charge of the battery and whether it is good
or bad. The tester can be used with any 12 volt
battery, in or out of the car. The test can be made
regardless of the state of charge of the battery; it can
also be made when the electrolyte level is low
- even
below the top of the plates.

1 C- 18 1973 OPEL SERVICE MANUAL
IGNITIPN SYSTEM
CbNTENTS
Subject
DESCRIPTION AND OPERATION: Ignition System ..................................................................
Ignition
Switc,h....................................................................
Ignition Coil
..........................................................................\
Distributor
............................I...............................................
DIAGNOSIS: (Not Available)
MAINTENANCE AND ADJUSTMENTS: Contact PointReplacement ............................................
Dwell Angle Adjustment :
................................................
Ignition Timing Adjustment ..........................................
Ignition Wire Inspection :
..................................................
Check Ignition Output ......................................................
Check Distributor
..............................................................
Check Spark Plugs
............................................................
MAJOR REPAIR: Distributor Removal ..........................................................
Disassembly ........................
I...............................................
Reassembly
..........................I...............................................
Distributor Installation
....................................................
SPECIFICATIONS: /
Ignition
Coil ..........................................................................
Distributor
....‘........................i...............................................
Spark Plugs ........................................................................\
..
DESCRIPTION AND OPERATION
INGITION SYSTEM
The ignition system basically consists of an ignitipn
switch, ignition coil, distributor, battery and related
wiring. The ignition switch is located in the steering
column, the ignition coil is located left front inner fender
skirt and the distributor is located at the left
front of the engine.
IGNITION SWITCH
The combined ignition switch and steering lock ian
be switched to any one of the below listed positions.
Insert key with notch pointing upward.
Page No.
lC-18
lC-18
lC-19
lC-19
1 c-20
1 c-20
1 c-20
lC-21 r
lC-21
1 c-22
1 c-22
1 r-23
1 C-23
1 c-24
1 C-25
1 C-26
1 C-26
1 C-26
(Fully counterclockwise) Lock position. Ignition
locked, steering locked, only with key removed.
Electrical circuits disconnected except to main light-
ing switch and dome lamp. The
key can be removed.
0- (First position clockwise from lock) Garage posi-
tion. ‘The key and lock assembly must be pushed “in”
to reach this position from lock. The steering is un-
locked and the ignition is off. The electrical circuits
are the same as in lock position. The key cannot be withdrawn.
l- [Chposition.) All electrical circuits controlled by
ignition switch are completed through the switch.
The key cannot
be removed while switch is in drive
position.

I
ilC- 201973 OPEL SERVICE MANUAL
There is also a plastic hood slipped over the distrivu-tar cap with an outlet for the ignition cables as an
added protection against moisture from the outside.
See Figure lC-2.
Figure lC-2 Ignition Distributor With Hood Installed
MAINTENANCE AND ADJUSTMENTS
CONTACT POINT REPLACEMENT
Removing Contact Points1. Remove contact support lock
,screw and remqve
contact point support. If condenser is to be replaced,
it will be necessary to replace condenser and
1eads;asan assembly.
Installing Contact Points1. Lightly lubricate distributor cam with high tein-perature cam and ball bearing lubricant. Excessive
lubricant will throw off into contact points.
:
,
2. Position support on breaker plate and install lock
screw leaving slightly loose for later adjustment..
3. Plug breaker arm wire in.
4. Adjust breaker point gap to ,016”.
/
DWELL ANGLE ADJUSTMENT
1. Connect dwell meter.
2. Remove distributor cap. Remove rotor. Loosen
breaker point set screw approximately
l/8 turn.
3. Insert screwdriver in notch of stationary breaker
point. Observe dwell meter while cranking engine.
Twist screwdriver as required to obtain a reading of
50 degrees plus or minus 3 degrees.4. Tighten breaker point set screw, then recheck
dwell.
5. Install rotor and cap.~Start engine and recheck
dwell. It is important that dwell be rechecked, as
instal~lation of rotor and cap will sometimes change
the dwell angle.
IGNITION TIMING ADJUSTMENT
Preliminary Timing (Engine Won’t Run)To time the ignition on any engine which will run,
use subparagraph b only. However, if the timing of
an engine is completely off, the following procedure
must first be used to get the engine to run.
1. With rocker arm cover removed, rotate crankshaft
in a clockwise direction until both valves for No. 1
cylinder are closed and the timing marks line-up.
(Valves are completely closed if rocker arms can be
“rocked” slightly.)
2. Install distributor in engine so that vacuum ad-
vance unit is in original position and notch in dis-
tributor rotor lines-up with notch in housing. See
Figure lC-3. If distributor does not seat in engine
block., turn distributor shaft so that rotor points
about 20 degrees clockwise from distributor timing
notch
(see Figure lC-18), then press lightly on dis-
tributor housing while cranking engine with starter.
After oil pump tang snaps into slot in distributor
shaft, start timing again from Step 1, leaving dis-
tributor installed.
Figure lC-3 Rotor Position for Filing No. 1 Cyliqder
3. Install distributor clamp and bolt, leaving bolt just
loose enough to permit movement of distributor. In-
stall distributor primary wire.L

IGNITION SYSTEMlC-214. Rota&distributor counterclockwise slightly until
contact pbints just start to open. This must be done
very carefully or engine will not start.
5. Install distributor cap. Make sure spark plug wires
are correctly installed in distributor cap, through clip
and on spark plugs.
Finish TimingIContact boint gap
(.016” at widest gap) or dwell 50
degrees plus or minus 3 degrees should always be
checked before adjusting ignition timing.
1. Connekt timing light to No. 1 spark plug.
2. Disconnect and plug vacuum advance unit and
retard u$it hoses.
3. Connect a tachometer from distributor side of coil
to
groun$l.4. Start dngine. Set idle speed to 900 RPM.
5. Rotate distributor as necessary to align timing
marks. T;ming mark is a steel ball embedded in the
flywheel and a pointer in a window in the right fly-
wheel housing. See Figure lC-4.:Figure lC-4 Ignition Timing Marks
6.
Tightq clamp bolt securely and recheck timing
mark ahgnment.
7. Reconnect vacuum hoses and adjust engine idle
speed
an: mixture.
IGNlTlOFj WIRE INSPECTION
1. The c$il and spark plug wires are of a specialresistance type. These secondary ignition wires
reduce television and radio interference.
2. Wipe ignition wires with a cloth moistened with
solvent and wipe dry. Bend wires to check for brittle,
cracked or swollen insulation. Defective insulation
will permit missing or cross-firing of spark plugs,
therefore any defective wires must be replaced.
3. If wire insulation is in good condition, clean any
terminals that are corroded and replace any termi-
nals that are broken or damaged. Terminals must tit
tight on spark plugs and in distributor cap.
4. Replace any hardened, cracked or loose cap nip-
ples or spark plug boots.
5. Check resistance of each wire from contact inside
distributor cap to spark plug or coil terminal. Re-
place any wire having over 10,000 ohms resistance
reading. See Figure lC-5.
Figure fC-5 Checking Ignition Wire Resistance
CHECK IGNITION OUTPUT
1. Disconnect secondary coil ivire so that engine will
not start. Connect a voltmeter from the battery side
of the coil primary to ground and check voltage
while engine is cranking. Reading should be 10 volts
or more. Low reading could be caused by a defective
battery, a discharged battery, high starter current
draw, a bad connection in the starter circuit or a bad
connection in the primary ignition circuit.
2. Connect an oscilloscope according to manufac-
turer’s instructions. Disconnect coil wire. Crank en-
gine and read coil output voltage. Reading should
exceed 20 KV (20,000 volts).

LIGHTING SYSTEMSlF-45LIGHTING SYSTEMS
CONTENTS
Subject
DESCRIPTION AND OPERATION:
LightingSystems................................................................
DIAGNOSIS:MAINTENANCT AND ADJUSTMENTS:
Headlamp Aiming..............................................................
MAJOR REPAIR:
Opel 1900
- Manta
HeadlightSwitch............................................................
Fog Lamp or Heated Rear Window Switch
..........
SealBeam........................................................................
Tail Lamps........................................................................
LicensePlateLamp........................................................
FrontSideMarker..........................................................
Rear Side Marker..........................................................
Courtesy Light................................................................
DoorJamSwitch............................................................
GT
Front Turn Signal..........................................................
SealBeam........................................................................
Tail Lamps........................................................................
Side Marker......................................................................
LicensePlateLamp........................................................
Backup Lamp
..................................................................
InteriorLight....................................................................
Headlamp Switch..........................................................
DoorJamSwitch............................................................
SPECIFICATIONS:
Page No.
1 F-45
1 F-46
1 F-46
1 F-47
1 F-47
1 F-40
1 F-49
1 F-49
1 F-50
1 F-50
1 F-50lF-51lF-51lF-51
1 F-52
1 F-52
1 F-53
1 F-53
1 F-53
1 F-53
DESCRIPTION AND OPERATION
DESCRIPTION OF LIGHTING SYSTEMThe
three-baition light switch on Opel 1900 and
Manta corjtrols the headlights, taillights, parking
lights, side marker lights, instrument panel lights,
and the lic&se plate light.
When the
Qght switch knob is pulled out to the first
stop, the .pxking lights, side marker lights, the Ii-
cerise plate light, and the instrument panel lights will
light.
Pulling the knob out all the way turns the headlights
on.The instrument panel lights come on when the head-
light switch is pulled out to the first stop or pulled
out ‘all the way. The instrument panel lights are
turned off by turning the switch knob counterclock-
wise past the first detent.

:lG- 56 1973 OPEL SERVICE MANUAL
I
FUSEqOSlTlON
1
2
3
4
5
6AMPS.
5
5
8
15
15
8ClRClJlT$ PROTECTED
OPEL 1900
& ‘MANTA (51,53,54,57,57R)
LEFT PARkING LIGHT,
LEFTTAIL LIGHT, LEFTSIDE
MARKER LIGHTS
RIGHT PApKING LIGHT, RIGH TAIL LIGHT, RIGHT
SIDE MARKER LIGHTS, INSTRUMENT PANEL LIGHTS,
SHIFT GUADRANT LIGHTS, LICENSE PLATE LIGHT,
FOG LIGHTS (RALLYE ONLY)
IGNITION IKEY
WARNIN BUZZER, TRUNK LIGHT,
HAZARD WARNING FLA,SHER, COURTESY LIGHT, CLOCK
BACKUP L’IGHTS, BLOWER MOTOR, CIGAR LIGHTER; RADIO,
SAFETY BELT WARNING BUZZER AND LIGHT
WINDSHIELD WIPERS, WINDSHIELD WASHER (RALLYE
ONLY), HORN
STOP LIGtiTS,TURN
SlGsNAL AND INDICATOR LIGHT,
PARKING BRAKE WARNING AND BRAKE FAILURE LIGHT,
FUEL GAGE, TEMPERATURE GAGE, OIL PRESSUREINDICATGR LIGHT. CHARGING INDICATOR~LIGHT,
TACHOMETER AND OIL PRESSURE GAGE (RALLYE ONLY)
AIR CONDITIONING
- 20 AMP INLINE F:USE
8
5
16
5OPEL GT
(77)WINDSHIELD WIPERS, WINDSHIELD WASHER, HORN, BACKUP
LIGHT, SP;FETY BELT WARNING BUZZER AND LIGHT
STOP LIGHTS, TURN SIGNAL AND INDICATOR LIGHT,
PARKING BRAKE WARNING LIGHT (AUTOMATIC ONLY),
BRAKE FAILURE WARNING LIGHT, RADIO, TACHOMETER,
OIL PRESiURE GAGE
& INDICATOR LIGHT, FUEL GAGE,
TEMPERATURE GAGE, CHARGING INDICATOR LIGHT
CIGAR LIGHTER, BLOWER MOTORIGNITION~KEY WARNING BUZZER, COURTESY LIGHT, CLOCK,
HAZARD WARNING FLASHER
LEFT PARKING LIGHTS, LEFT TAIL LIGHT, LEFT REAR
SIDE MAdKER LIGHT
RIGHT PA’RKING LIGHTS, RIGHT TAIL LIGHT, RIGHT REAR
SIDE MAdKER LIGHT
INSTRUMENT PANEL LIGHTS, LICENSE PLATE LIGHT.
SHIFT QUADRANT LIGHT
AIR CON,DlTlONlNG
-A/C HAS A 20 AMP INLINE FUSE AND IS
CONNECTED TO THE HOTSIDE OF FUSE NO. 23OlG3

,I
IINSTRUMENT PANEL
lH- 57
/
/SubjectPage No. INSTRUMENT PANEL
CONTENTS
DESCRIPTION AND OPERATION:
Instrument Panel
- Opel 1900 - Manta. . . . . . . . . . . . . . . . . . . . . .Instrument
Panel-GT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .DIAGNOSIS:
MAINTENANCE AND ADJUSTMENTS:
MAJOR REPAIR:
Instrument Cluster Housing
- Opel 1900 - Manta . .
Windshield Wiper Switch
. , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .InstrumentCluster
Bulbs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .InstrumentCluster
Housing-GT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Combined Switch Assemblies
. . . . . , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .CigarLighter
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .SPECIFICATIONS: (Not Applicable)
I H-57
1H-58
1H-59
1H-61
lH-61
1H-61
1H-63
1H-64
DESCF(lPTlON AND OPERATION2. The fog light toggle switch lower half is pushed in.INSTRUFENT PANEL (OPEL 1900. MANTA)
Headligl$ Switch
3. The parking lights and/or low beam headlights are
on.The thr& position light switch controls the head-
lights, @lights, parking lights, side marker lights,
license
plate light and instrument panel lights and is
located
4t the lower left on the instrument panel.
With thk switch knob pulled outward to the first
stop,
thi parking lights, side marker lights, license
plate
ligiit and instrument panel lights will light. Theinstrumdnt panel lights can be turned off by turning
the
lightSwitch knob counterclockwise past the first
detent. IThe fog lights are automatically turned off if the
ignition switch is on and the headlights are on high
beam.
Windshield Wiper Switch
The windshield wiper switch is located on the instru-ment panel to the right of the headlight switch.
By pull&g the lightswitch knob out all the way, the
headlights will also be turned on.
IBy pushing the lower half of this switch in to the first
stop, the wipers will operate at slow speed. By push-ing in to the second stop, the wipers will operate at
fast speed.
Fog
Ligh) Switch (Rallye)The fog
iight toggle switch is located in the instru-
ment cluster to the left of the temperature and fuel
gauge
cl+ster. The fog lights can be turned off at any
time by
t,he toggle switch, but can only be turned on
when: ,
Electrically Heated Rear Window Switch (If
Equipped)The heated rear
wind&v switch is located in the
instrument panel to the right of the clock opening.
1. The ignition switch is on or the engine running.
ITo operate (only possible with the engine running),
push in on the lower half of the switch. When the
rear window is being heated, the switch will
belighted.

/
I1 H- 601973 OPEL SEW& MANUAL
1. Remove headlight switch button by depressing
retaining clip on shaft and pulling back on switch
knob. See Figure lH-3.
Figure 1 H-5
- Removing Cluster Screws
Figure lH-3
- Removing Headlight Switch Knob,
2. Remove two (2) plugs on cluster panel. See FigurelH-4.301H6
-Figure 1 H-4 Removing Plugs
3. Remove two (2) sheet metal screws behind plugs
on cluster. See Figure lH-5.
4. Pull off heater control knobs toward front.
j5. On top, carefully pull instrument ‘trim plate
:to-wards steering wheel and remove plate.
6. Remove two screws for lower housing
attach&t.See Figure lH-6.Figure 1 H-6 Lower Housing Attaching Screws
7. Disconnect speed0 cable at cluster by turning cou-
pling counterclockwise.
8. If equipped, pull heated rear window or fog lamp
switch out of instrument housing and disconnect
wires from switches.
9. Pull cluster right and left sides partially out and
disconnect wires on back of cluster. See Figure lH-7.
Installation
1.
P&e instrument cluster in position and connect
wires on back of cluster.
2. Pull fog light or heated back glass switch wires
into opening, if equipped, and connect wires and
replace switch.
3. Connect two screws on lower housing attachment.