1973 OPEL GT-R ECU

1 E- 421973 OPEL SERVICE MANUAL
Figure 1 E-l 7 Solder Positive Brush Lead to Brush
Holder
9. Install motor housing over armature so that large
drain hole on housing is facing downward when
mb-tor assembly is installed in car.
InSert angle brackets
into motor housing and tighten attaching screws. Be
sure to reseal angle brackets to motor housing after
retaining screws are tightened.
10. Connect assembled motor with an ammeter and
adjust end play of armature shaft grid drive gear. To
do so, turn in the respective adjusting screw until the
current consumption increases. Then back off adjust-
ing screw
l/2 turn. Secure driven gear adjusting
screw with lock nut and armature adjusting screw
with paint. See Figures lE-18 and lE-19.
Installation1. Connect wiper motor electrical connector to mo-
tor.
2. Place wiper motor in position on cowl and secure.
Torque attaching nuts 14 to 17 in.lbs.
3. Place crank arm on motor drive shaft and torque
nut as follows: Bosch and SWF, 70 to 87 imlbs. and
Siemans, 122 to 139 in.lbs.Figure 1 E-l
8 Adjusting Armature End Play
Figure
lE-19 Adjusting Driven Gear End Play
4. Check the position of the windshield wiper blades
for proper position after the crank arm is attached.
See Figure lE-3 for the proper distance the blades
should be from the windshield molding in the park
position.

1F. 46 1973 OPEL SERVICE MANUAL
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Headlight High-Low Beam Control and Passing:
SignalI
When the headlights have been switched on, high
and low beam selection is made by raising the direc-
tional signal lever toward steering wheel. Each
ti&the lever is raised, beam position, will change.
When the headlights are not on, a flashing headlight
signal may be given by raising and lotiering the di-
rectional signal lever. With the headlights on and
inlow beam position, raising and lowering the direc-
tional signal lever will also cause the headlights to
flash.
Fog Light SwitchAll Rallye models are equipped with two white f?g
lights mounted below the front bumper.
The fog light toggle switch is located on the
insty-ment cluster to the left of the temperature and
fuelgauge cluster.
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The fog lights can be turned off at any time by the
toggle switch, but can only be tyrned on when: :
1. The ignition switch on or the
?gine running.!
2. The fog light toggle switch lower half is pushed
in.3. The parking lights and/or low beam headlights
are
OKThe fog lights are automatically turned off if the
ignition switch is on and the headlights are switched
to high beam position.
Courtesy LightThe courtesy light illuminates the interior of the Car
when any door is opened. The courtesy light can also
be turned on with all doors closed by tilting the l&s.
GT Headlamp MechanismThe concealed headlamps are moved mechanically.
Pushing actuating lever on left side of console opens
headlamps and pulling lever closes headlamps. Two
(2) meshing gear segments convert the movement, of
the lever to a rotation of 180 degrees. The pivots of
the headlamps lie below the centerline so that with
headlamps in closed position, the headlamp housing
is flush with front sheet metal. Refer to Group 110,
Section “F”, for service procedures on the GT head-
lamp mechanism.
A white indicator lamp in the instrument panel lights
if the headlamps are not completely opened lorclosed The switches of the headlamp electrical sys-
tem are located behind the left headlamp operating,
mechanism.
MAINTENANCE AND ADJUSTMENTSHEADLAMP AIMING
The headlamps must be properly aimed in order to
obtain maximum road illumination and safety that
has been built into the headlighting equipment. With
the Guide T-3 type sealed beam units, proper aiming
is even more important because the increased range
and power of this lamp make even slight variations
from recommended aiming hazardous to approach-
ing motorists. The headlamps must be checked for
proper aim whenever a sealed beam unit is replaced
and after an adjustment or repairs of the front end
sheet metal assembly.
Regardless of method used for checking headlamp
aim, car must be at normal weight, that is, with gas,
oil, water, and spare tire. Tires must be uniformly
inflated to specified pressure. If car will regularly
carry an unusual load in rear compartment, or a
trailer, these loads should be on car when headlamps
are checked. Some States have special requirements
for headlamp aiming adjustment, and these require-
ments should be known and observed.
Horizontal and vertical aiming of each seal beam
unit is provided by two adjusting screws which move
the mounting ring in the body against the tension of
the coil spring. There is no adjustment for focus,
since the sealed beam unit is set for proper focus
during manufacturing assembly.
MAJOR REPAIRHEADLIGHT SWITCH
- OPEL 1900. MANTA
Removal1. Remove instrument cluster cover panel. See Sec-
tion H.
2. Compress retaining springs and pull switch out.
See Figure 1 F-
1.3. Pull multiple socket off switch.
Installation
1: Plug multiple socket in switch and push switch in
panel until clips lock in place.
2. Replace instrument cover and secure with two (2)
screws.

ll- 66 1973 OPEL SERVICE MANUALi
ConditionPossible CauseCorrection
Gas gauge does not read
full when tank tilled1. Tank unit misadjusted1. Install 40 ohm resistor
between connector and ground
I
(disconnect from unit). If
dash unit reads full within
one pointer width. Remove
/
Igas tank unit from tank, install
connector, ground unit and
adjust tab to obtairi full reading on
dash. Reinstall tank unit.
2. Defective’ voltage
stabilizer1. See corrective action above.
Gas gauge not operating1. Corroded tank unit
terminal I1. Check tank unit terminal, if
corroded clean, pack connector
with grease and reinstall
connector..
2. Loose dash gauge
!
1. Install 40 ohm resistor between
sending unit connector. and
ground (disconnect from tank
terminal). If dashgauge does
not read rull, check dash gauge
attaching nuts for secureness
and tighten if required.
(Requires removal of dash panel)
Momentarily touch dash gauge
attaching studs to 12 volt
source. If indicator moves,
reinstall panel; if not, replace
gauge. (Caution do not keep
studs connected to 12 volt
source for more than a few
seconds
- damage to gauge can
result)
3. Open
w&g1. Remove connector from sending
unit and ground (40 ohm
resistor may be used if
ohmmeter available. Remove
multiple connector from rear
of dash. Connect test light
to ground and touch other end
to connector socket with blue
and black wire, if it does not
light (40 ohm reading of ohm
meter used) repair open circuit.
4. Defective gas tank
sending unit1. Install 40 ohm resistor between
temperature sending unit and
ground (disconnect from unit)
if dash unit reads full scale.
Replace tank unit (check for
terminal corrosion before
replacing).

I
GAUGES1 I- 67I
I Condition
Car
&s out of gas with
gauge indicating fuel in
tank. 1
I
I
I
I
IPossible Cause
1. Tank unit misadjusted
2. Defective voltage
stabilizer.Correction
1. Follow corrective action as
stated above (obtain empty
reading on dash)
1. See corrective action above.
Temperature gauge not1. Loose dash gauge1. See corrective action above.
Iattaching nut.
I
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I2. Defective temperature1. Install 40 ohm resistor
Isending unitbetween temperature sneding
Iunit and ground (disconnect
I
from unit). If dash unit reads
I
full scale, replace temperature
Isending unit.
I
I
I3. Open wiring.1. Follow corrective action as
Istated above (connector socket
Iwith blue wire).Tempkrature gauge indicates
hot when engine temperature1. Incorrect temperature1. Check for correct sending unit
sending unit
normal.(white porcelain) replace if
incorrect.
2. i>efective temperaturesending unit.1. See corrective action above.
3. Dkfective voltage
stabilizer.
1. See Corrective action above.
GAS
GdUGE TROUBLE DIAGNOSIS - GT4. Disconnect the tank unit lead wire (light blue with
black tracer) from the tank unit.
An inoperative gas gauge reading can normally be
found to result from a poor grounding condition
within the circuit. Using the procedure as outlined
below may lead to the correction of the inoperative
reading without replacement of either the tank unit
or the
dph unit.5. Connect ihe stock tank unit; ground unit, and
operate manually.
6. If the dash unit shows a correct reading, then
replacement of the tank unit is required as the cor-
rection.
1. Makelcertain the gas tank (ground) strap is prop-
erly secured.A correct reading will be one which resembles the
movement of the manually-operated tank unit.
2. Make’certain the ground wire (brown in color) for
gasoline/ and temperature gauges is properly con-
nected tb the windshield wiper motor and is secured.
(This
gl?ound wire is also common for the heater
blower
etor.)7. If the dash unit does not show a correct reading,
then its replacement is necessary.
If the adove procedure does not produce a satisfac-
tory gaube reading, an attempt to isolate the defec-
tive
par<, i.e. tank or dash unit should be made.
3. Rem&e a tank unit from parts stock.MAJOR
AEPAIR
OPEL 1900. MANTA
Removing Voltage Stabilizer1. Remove instrument cluster housing assembly.

2C- 121973 OPEL SERVICE MANUAL
3. Install quarter window and fasten chromed mold-
ing. See Figure 2C-10.REMOVAL AND INSTALLATION OF REAR
QUARTER WINDOW OPEL 1900. MANTA
1. Unscrew rear quarter window
Iqck. See Figure2c-11.
Figure
2C-1 1 Quarter Window Lock Attaching Screws
2. Unscrew window hinge from lock pillar while
holding window. See Figure
2C-12.3. On installation, seal hinges with a plastic com-
pound.
Figure 2C-12
Cluarter Window Hinge AttachingSCW@S4. Carefully push rail off window. On rear quarter
window lock, drill off pin and unscrew retainer from
window. See Figure
2C-13.Figure 2C-13 Drilling Off Quarter Window Lock Pin
REMOVAL AND INSTALLATION OF HINGED
REAR QUARTER WINDOW
- GT
Removal1. Remove three screws securing lock to rear quarter
pillar. See Figure
2C-14. Swing window outward and
lift off rear quarter window. Care should betaken
that window does not fall off pivots when swung
outward.
Figure 2C-14 Rear Quarter Pillar Lock
- GT
2. Remove frame from glass
Installation1. Install frame to glass.
2. Install lock to rear quarter pillar, securing with
three (3) screws.

2D-161973 OPEL SERVICE MANUAL
2. Remove door lock knob.
3. Remove door inside handle.
4. Adjust sash window so that the main lever with
toothed segment are in alignment with the front re-
taining plate. See Figure 2D-9.Figure 2D-9 Aligning Main Lever With Front Retaining
Plate5. On Models 57, 57L and 57R, scribe position of
screw at the plastic support of window rail and un-SCRW.
6. Block sash window in door interior.
7. Scribe position of window lifter guide rail
screws.See Figure 2D- 10.
Figure 2D-10 Guide Rail Screws
8. Unscrew window lifter and let it down slowly.
9. Slide window upwards and block it.10. Remove window lifter through opening in inner
door panel upper part. See Figure 2D-11.
Figure
2D-1 1 Removing Window Lifter
Installation
1. Install window lifter through opening in inner
door panel tipper part. See Figure 2D-
11.2. Block window upwards.
3. Secure window lifter.
4. On Models 57 and 57R, secure plastic support of
window rail.
5. Install inside door handle.
6. Install door lock knob.
7. Install door trim pad.
REMOVAL AND INSTALLATION OF FRONT DOOR
LOCKRemoval
1. Remove door trim pad.
2. Remove door lock knob.
3. Remove door inside handle.
4. On lock side, scribe position of guide rail bolt,
unscrew bolt, push guide rail downwards, and
remove it through access hole. See Figure 2D-12.
5. Remove door lock and install new one. See Figure
2D-13.

DOORSZD- 21
RIGHTLEFT ~-ZD-27
Figure ZD-27 Cables Wound On Regulators
Installation - Right DoorIn clockwise direction, wind cable onto pulley up to
the shoulder and clamp it behind lug. See Figure2D-27.
REMOVING AND INSTALLING
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TAILGATE HINGES
Removal1. Remove screws securing hinge trim panel covering
tailgate binges and lift out trim panel. See Figure
2D-28.2. Disconnect battery, remove tail
te trun pad, and
withdraw wiring from tailgate.
u3. Mark position of tailgate hinges on tailgate,
remove bolts securing tailgate to hinges and lift off
tailgate.
,’HINGE TRIM
PANEL1IFigure ZD-28 Removing Tailgate Hinge Trim Panel
4. Release and remove torque rods. See Figure 2D-
29.Figure ZD-29 Tailgate Torque Rods
5. Remove bolts securing tailgate hinges to roof
panel and lift out tailgate hinges.
Installation1. Install tailgate hinges to roof panel and secure
with bolts.
2. Install torque rods. Installation of torque rods may
be facilitated by using vise-grip pliers to work torque
rod end over catch.
3. Install tailgate to tailgate hinges.
4. Install wiring to tailgate
5. Install tailgate trim pad and tailgate hinges panel
COVehg.6. Connect battery

2F-261973 OPEL SERVICE MANUALMAINTENANCE AND ADJUSTMENTSADJUSTING HEIGHT OF SUN ROOF PANEL
Adjust height of sun roof as follows:
1. Opel sun roof to half open position and pry apart
sun roof frame from sun roof panel (see Figure
2F-1).Figure
ZF-1 Separating Sun Roof Frame From SunRoof Panel2. Push detached sun roof frame rearward until it
contacts car roof stop.
NOTE: If difficulty is encountered when pushing
sun roof frame to rear due to the frame hooking into
the sun roof panel, close sun roof until lifters come
into operation. The sun roof frame should now easily
slide rearward.
ADJUSTMENT FRONT OF SUN ROOF
To adjust height of front of sun roof proceed as
follows:
1. Close sun roof.
2. Loosen screws securing front guides to front of sun
roof panel (see Figure
2F-2). Rotate height adjust-
ment ring until desired height is attained.
3. Readjust guides outward so that guides just touch
sides of rails and are not wedged or cocked against
rail sides and tighten screws. Recheck height adjust-
ment.
NOTE: The guides should lightly contact the guideFigure
ZF-2 Sun Roof Front Guide
rail and should have a clearance of no more than 0.02
inch.
ADJUSTMENT. REAR OF SUN ROOF
To adjust height of rear of sun roof proceed as fol-
lows:1. Completely close sun roof and check that the rear
sun roof lifter guides from approximately a 90 degree
angle with respect to the guide rail and that the lifter
contacts the guide stop (see Figure
2F-3). If this is
Figure
2F-3 Rear Sun Roof Lifter 90 Degrees toGuide Rail