1973 OPEL GT-R service

1 H- 62 1973 OPEL SERVICE, MANUAL
4. Remove flasher unit. See Figure IH-12.
5. Position steering so that wheels are straight ahead.
6. Pull off heads of both tear bolts by first drilling a3/16 inch pilot hole and then using a stud extractor
to remove tear bolts. See Figure lH-13.
Figure 1 H-10 Removing Right Aicess Cover andSWW3. Remove left access cover and f”rnove screw. See
Figure lH-11.
Figure 1 H-l 3 Steering Column Attaching Bolts
7. Disconnect ignition (white) and directional signal
(black) wire set plugs.
8. Support steering column assembly and remove
both hex head bolts. See Figure lH-13.
9. Drop steering column assembly to floor.
10. Disconnect speedometer cable.
11. Remove six (6) screws on instrument cluster. See
Figure
lH- 14.
Figure lli-1 1 Removing Left Access Cover and
SC&Figure lH-14 Instrument Cluster Screws
12. Pull back on instrument cluster from top to
remove. See Figure lH-15.
Figure l H-12 Flasher Unit Installed13. Disconnect wires on back of radio. See FigurelH-16.

lti- 64 1973 OPEL SERVICE MANUALj
Removal of Cigar Lighter GT/
1. Remove instrument housing.I
’ 2. Disconnect electrical wire.
3. Remove hex nut on back of cigar lighter
base’.’4. Remove cigar lighter base.
Installation1. Install cigar lighter base.
2. Install hex nut on back of lighter base.
3. Connect wire to lighter.
4. Replace instrument cluster.

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).

1 I- 68 1973 OPEL SERVICE MANUAL
2. Pull voltage stabilizer of back of printed circhit.
See Figure
11-l.
!
L-_ -~~---,~. _^__, _-_~
Figure 1 l-3 - Speedometer Attaching Screws
Figure
11-l -Voltage Stabilizer
installation
2. Install six (6) screws holding instrument cluster
lens in housing.
3. Replace cluster housing.
1. Install voltage stabilizer on
back of printed circuit.
2. Install instrument cluster
ho*sing assembly. j
I
Removing Speedometer I
1. Remove instrument cluster housing.:
2. Remove six screws shown in Figure
11-2 and
remove both instrument
cluster’lens.
Figure 1 l-2 - Removing Instrument Cluster Lens
3. Remove three speedometer attaching screws. L&X
Figure 11-3.
/
Installation
1. Replace speedometer in cluster with three (3) at-
taching screws.
Removing Electric Clock or Tachometer
1. Remove instrument housing.
2. Remove six screws and remove both instrument
cluster lens, as shown in Figure
11-2.
3. Remove three screws, as shown in Figure 11-4, and
remove clock or tachometer.
L-u-.------ _._- -----G1.-A-... -.
Figure 1 l-4 - Removing Electric Clock or Tachometer
1. Install clock or tachometer in instrument cluster
with three (3) attaching screws.
2. Install six (6) screws holding instrument cluster
lens.

1 J- 72 1973 OPEL SERVICE MANUAL
I
WIRING IDIAGRAMS
CONTENTS
Subject
1973 WIRING DIAGRAMS: Windshield Wiper and
Horn:- Opel 1900 -
Manta....................................I.............. ..............................
Windshield Wiper and Horn’- Rallye ..........................
Windshield Wiper
andHorn!-GT
..................................
Turn Signal and Hazard Flasher
-
Opel 1900 - Manta !
........................................................
Turn Signal and Hazard Flasher
- GT ..........................
Oil, Fuel,
Temp.: Tach, Stop and Brake
Warning Light
.GT........................................................
Blower Motor, Lighter and
Rackup Lights -
Qpel 1900.Manta ........................................................
Blower Motor and Lighter
.,GT....................................
Indicator Lights and Gauges
- Opel 1900 -
Manta ........................................................................\
........
Indicator Lights
andGauges.Rallye ..........................
Dome Light and Buzzer
- Opel 1900 - Manta..........
Dome Light, Buzzer and Clock - GT ............................
Headlamps
- Opel 1900 ’
....................................................
Headlamps
.Mantaj............................................................
Headlamps and Fog Lights
.Rallye ..............................
Headlamps, Parking, Tail and Instrument
PanelLighting.GT ........................................................
Left Parking and Tail Lights
- Opel 1900 -
Manta ..................................i.............................................
Right Parking and Tail Lights
- Opel 1900 -
Manta................. ..*............................................................
Starting, Ignition and Charging
-
Opel 1900.Manta..........i.............................................
Starting, Ignition and Charging
- GT ..........................
Instrument
Panel.GT ......................................................
A/C Generatorand Regulator
- All Models..............
Seat Belt Warning System (Manual Transmission)
-Opel1909-Manta ..........................
Seat Belt Warning System (Automatic Transmission)
.Opel 1900 - Manta..........................
Seat Belt Warning System (Manual Transmission)
- GT........................................................ Page No.
1 J-74
1 J-75
1 J-76
1 J-77
1 J-78
1 J-79
1 J-80
lJ-81
1 J-82
1 J-83
1 J-84
1 J-85
1 J-86
1 J-87
1 J-88
1 J-89
1 J-90
1 J-91
1 J-92
1 J-93
1 J-94
1 J-95
1 J-96
1 J-97
1 J-98

j/1J. 74 1973 OPEL SERVICE MANUALi
I;m
Figure
13-1 Windshield Wiper and Horn - Opel 1900 - Manta

1 J. 76 1973 OPEL SERVICE IMANUAL
:LJFigure lJ-3
Wind$hield Wiper and Horn - Gl

I i--
LI
.
lJ- 78 1873 OPEL SERVICE~MANUAL’
Figure lJ-5 Turn
Signal and Hazard Flasher - GT