1973 OPEL GT-R fuse

98.96 1973 OPEL SERVICE MANUALr DARK BLUE
LIGHT BLUE STRIPE
CUTOUT111111DARK GREEN DARK GREEN
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I
,\,\
BATTERYl LJ
\flu- +tL-2+- -7- -RESISTOR
A
EXlSilNG‘IWIRE
I
I
IFUSE BLOCK*,*,- I./SWITCH
r
ti‘WIREfIfI
1- IAAI
i$+.-lAC~,‘XESW WIRE
I I
TTEVAPO.RATOREVAPO.RATOR
BLACK WITH RED STRIPE BLACK WITH RED
Sl96-143
Figure 9B-188 Wiring Schematic‘RIPE96-143
Figure 9B-188 Wiring Schematic
SPECIFICATIONS
Blower Motor Type
......................................................................................................12 VDC
Blower Fan Type
..................................................................................................Squirrel Cage

98.98 1973 OPEL SERVICE MANUALDIAGNOSISTROUBLE DIAGNOSIS GUIDE
Insufficient Cooling
CHECK AIR FLOW
FAN DOES NOT RUN
- Correct electrical fault.
FAN RUNS
- Check air velocity.
NOT OK
- Clean evaporator inlets.
Clean evaporator core.
Clean evaporator outlets.
OK
- Check refrigeration (refer to Refrigeration
Diagnosis Guide).
MAINTENANCE AND ADJUSTMENTS
ADJUSTMENT OF THERMOSTATIC SWITCHThe system makes use of a thermostatic switch with
a self-supporting air sensing capillary. This capillary
controls the switch by sensing the temperature of the
air leaving the evaporator tins.
Checking for Proper Operation
1. Install the gauge set, and set up the vehicle as
described under FUNCTIONAL TESTING SYS-
TEM in Refrigerant Components Section.
2. Movement of the temperature control knob
should result in a definite change in suction pressure
and cycling of the compressor clutch.
3. If compressor continues to operate regardless of
the knob adjustment it indicates that the switch
points are fused, which will lead to evaporator
freeze-up. The switch should be replaced.
Adjusting Switch
If after the foregoing checks, the switch seems to be
operating correctly, adjust for proper setting if neces-
sary, as follows:
1. Set up car as described in FUNCTIONAL
TESTING SYSTEM in Refrigerant Components
Section.
2. The suction side of the system, read on the lowpressure gauge, should pull down to the pressure
shown in the chart in SPECIFICATIONS in Refrig-
erant Components Section.
3. Remove the duct assembly mtaining screws and
remove the duct assembly noting the position of the
air sensing capillary so that it can be reinstalled in
the same location as when removed. See Figure 9B-
190.Figure 98.190 Duct Assembly and Retaining Screws
Figure 9B-13 1 Duct Assembly
4. Remove the thermostatic switch retaining screws
and remove switch. Remove the non-metal end plate
from the switch to gain access to the switch adjusting
screw. Check the screw for stripped or otherwise
damaged threads.

RADIO. GT9c- 105
RADIO
GTCONTENTS
Subject
DESCRIPTION AND OPERATION: (Not Applicable)
DIAGNOSIS:
RadioTroubleDiagnosis. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .MAINTENANCE AND ADJUSTMENTS:
Antenna Trimmer Adjustment
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .MAJOR REPAIR:
RemovingandInstallingRadio. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .SPECIFICATIONS: (Not Applicable)
Page No.
9c-105
9C-106
9c-107
DIAGNOSIS
RADIO TROUBLE DIAGNOSISBecause radio problems are most often repaired at
United Delco authorized warranty repair stations,
the tendency for many dealer servicemen is to
remove the set when a problem is reported, without
any preliminary diagnosis. This results in a large
number of radios showing up as “NO TROUBLE
FOUND” units when received by the warranty re-
pair stations. This indicates that the trouble can
often be corrected without removal of the radio.
The inconvenience to an owner of driving without a
radio while his set is being serviced at a warranty
station can frequently be avoided if the following
quick checks are used to eliminate external radio
system :problems before removing the radio for re-
pair.
Always determine from the owner the exact nature
of the radio problem as an aid to diagnosis. Knowing
whether the condition is intermittent or constant,
whether it occurs with engine off or running, with
car stationary or moving, will help to pinpoint the
problem. Never turn on radio with speaker discon-
nected.
Radio Ii
Inoperative.1. Turn on the radio. The dial should light and a
thump should be heard from the speaker.a. If a thump is heard, go to Step No. 2 for antenna
check.b. If no thump is heard,
check the fuse.
(1) If fuse is bad, replace and try radio again. Race
engine and, if fuse blows again,‘remove the radio and
speaker assembly for repair by
4 trained radio techni-
cian.
(2) If fuse is good, check to
s&e that the speaker-to-
receiver interconnecting cable is connected securely.
If there is still no thump when the radio is turned on,
remove the receiver and speaker for repair.
2. Check the antenna by substituting with one held
out the car window.
a. If radio is still dead with substitute antenna,
remove the receiver and spea!er for repair.
b. If radio operates near normal with substitute an-
tenna, some part of the car antenna or lead-in is at
fault.
Radio Reception Is Weak1. Check to see if antenna trimmer is peaked.
a. Position antenna at a height of 31 inches.
b. Tune radio to weak station at or near 1400 KHz
on the dial, and turn volume control to maximum.

RADIO - OPEL 1900 - MANTA9c- 109
RADIO
OPEL 1900
- MANTA
CONTENTS
Subject
DESCRIPTION AND OPERATION: (Not Applicable)
DIAGNOSIS:
RadioTroubleDiagnosis. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .MAINTENANCE AND ADJUSTMENTS:
Antenna Trimmer Adjustment
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .MAJOR REPAIR:
Removal&InstallationRadio. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal81InstallationAntenna. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .SPECIFICATIONS:Page No.
9c-109
9c-110
9c-111
9c-111
DIAGNOSIS
RADIO TROUBLE DIAGNOSISBecause radio problems are most often repaired at
United Delco authorized warranty repair stations,
the tendency for many dealer servicemen is to
remove the set when a problem is reported, without
any preliminary diagnosis. This results in a large
number of radios showing up as “NO TROUBLE
FOUND” units when received by the warranty re-
pair stations. This indicates that the trouble can
often time be corrected without removal of the radio.
The inconvenience to an owner of driving without a
radio while his set is being serviced at a warranty
station can frequently be avoided if the following
quick checks are used to eliminate external radio
system Problems before removing the radio for re-
pair.
Always determine from the owner the exact nature
of the radio problem as an aid to diagnosis. Knowing
whether! the condition is intermittent or constant,whether::it occurs with engine off or running, with
car stationary or moving, will help to pinpoint theproblem: Never turn on radio with speaker discon-
nected.
Radio Is Inoperative
1. Turn on the radio. The dial should light and a
thump should be heard from the speaker.a. If a thump is heard, go to
Step No. 2 for antenna
check.b. If no thump is heard, check the fuse.
(1) If fuse is bad, replace and try radio again. Race
engine and, if fuse blows again, remove the radio and
speaker assembly for repair by a trained radio techni-
cian.
(2) If fuse is good, check to see that the speaker to
receiver interconnecting cable is connected securely.
If there is still no thump when the radio is turned on,
remove the receiver and speak+ for repair.
2. Check the antenna by substituting with one held
out the car window.
a. If radio is still dead with’substitute antenna,
remove the receiver and speaker for repair.
b. If radio operates near normal with substitute an-
tenna, some part of the car antenna or lead-in is at
fault.
Radio Reception Is Weak1. Check to see if antenna
tri$mer is peaked.
a. Position antenna at a height,of 31 inches.
b. Tune radio to weak station at or near 1400 KHz
on the dial, and turn volume control to maximum.

Subject
Page NumbelSubjectPage Number4.Speed Manual I..
Clutch
Detent Cable Adjustment
:Differential
Directional Signal Switch
Repair Opel 1900 & Manta
Repair GT
:Disassembly of
4.Speed Manual Transmission
DistributorFunction of Valves and Hydraulic Control Units
Opel
3.Speed Automatic.................
74-21
Fuse Chart..............................lG-56
Fusible Link.............................
lA-8Specifications.
Point Replacement..
..,78-127A-
17c-9148-73E-393E-4878.23
1C-26
1 c-20
GEGas Tank See Fuel Tank
General Specifications
Engine...............................6A-28
Opel 3.Speed Automatic
.................7C-134
Transmission, Manual.,
..................78-33
Clutch...............................7A-7
Body................................ZA-4
Governor Drive Gear
Opel
3.Speed Automatic.................7C-103
Grille
Opel 1900 & Manta.....................8A-7
GT..................................8A-6 Electrically Heated Rear Window
Engine
General Description
Cooling System
Lubrication System
Trouble Diagnosis
Exhaust Manifold
Exhaust System
Removal and Installation
External Oil Leaks,
Opel 3 Speed Automatic
FFast Idle Adjustment
..................
Filter-Engine Oil
......................
Fluid Checking Procedure Transmission
Opel 3Speed Automatic.............
Frame-Opel 1900 & Manta.............
Frame
GT-Opel......................
SWVOOpel Xipeed Automatic...........
Front Suspension
Opel1900&Manta.................
GT..............................
Front Wheel Alignment................
Front Wheel Bearing Adjustment
All Series.........................
Fuel Gauge
Trouble Diagnosis
Opell$OO&Manta...............
GT............................
Fuel Pump Operation..................
Fuel System
Fuel Tank (Opel 1900 & Manta)
.......
Fuel Lines (Opel 1900 & Manta)
.......
Fuel Tank
(GT)....................
Fuel Gauge Tank Unit
(GT)...........
Fuel Lines
(GT)....................
Fuel Tank Removal and Installation....
Cleaning Tank.....................
lH-576A-268-326A-46A-66A-126D-427C-816E-51
oc-77C~Bl2B-826-77c-1003A-23A-23C-223A-4
HHazard Warning Flasher
....................lG-55
Headlamp Aiming
.........................1 F-46
Headlamp Switch
Opel 190.0 & Manta
.....................1 F-46
Headlamp Mechanism GT
..................8A-2
Heater System Opel 1900 &Manta
Trouble Diagnosis
......................9A-11
Description and Operation
................9A-10
Adjustments and Minor Service............9A-12
Removal and Installation
.................9A-12
Specifications..........................$A-16
Heater System GT
Trouble Diagnosis
......................9A-4
Description and Operation
................9A-2
Adjustments and Minor Service
............9A-4
Removal and Installation.................9A-5
Specifications..........................$A-9Horn
Operation.............................lG-54
Hydraulic Operation
Opel
3.Speed Automatic.................7C-64
IIdentification Number Vehicle...............
OA-1ldle.Adjustment
..........................6E-51
Inflation Pressures, Tires.
...................36-62
Ignition Coil
Specifications.
.........................
lC-26Identification, Engine
......................
OA-1Ignition System
Timing...............................
lC-20Instrument Panel Parts Removal