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DIAGNOSIS
HEADLAMP DIAGNOSIS
Condition
Possible Cause
C orrection
One headlamp inoperative
1. Loose connection
1. Secure connections to sealed
or intermittent
beam including ground.
(Black Wire)
2. Defective Sealed Beam
2. Replace sealed beam
One or more headlights
1. Open ground connection
1. Repair black wire connection
are dim.
at headlight
between sealed beam and body
ground.
2. Black ground wire
2. Relocate black wire in connector
mislocated in headlight
connector (type 2
sealed beam)
One or more headlights
1. Voltage regulator
1. Readjust regulator to
short life
misadjusted
specifications.
All headlights inoperative
1. Loose connection
1. Check and secure connections
or intermittent
at dimmer switch and light
2. Defective dimmer
switch
3. Open wiring - light
switch to dimmer
switch
4. Open wiring - light switch
to battery
5. Shorted ground circuit
6. Defective light switch
switch.
2. Check voltage at dimmer switch
with test lamp. If test lamp
bulb lights only at light blue
wire terminal, replace dimmer
switch.
3. Check light blue wire with test
lamp. If bulb lights at light
switch light blue wire terminal
but not at dimmer switch, repair
open wire.
4. Check red wire terminal at light
switch with test lamp. If lamp
does not light, repair open red
wire circuit to battery, (possible
open fusible link)
5. If, after a few minutes operation,
headlights flicker “O N ” and
“ O F F ” and or a thumping noise
can be heard from the light
switch (circuit breaker opening
and closing), repair short to
ground in circuit between
light switch and headlights. After
repairing short, check for
headlight flickering after one
minute operation. If flickering
occurs, the circuit breaker has
been damaged and light switch
must be replaced.
6. Check red and white wire
terminals at light switch with
test lamp. If bulb lights at read
wire terminal but not at light
blue terminal, replace light
switch.
Содержание 1977 light duty truck
Страница 1: ......
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Страница 70: ...Fig IB 24 Four Season System Vacuum Diagram C K Models 1B 24 LIGHT TRUCK SERVICE M A N U A L...
Страница 71: ...Fig lB 25 Overhead System Wiring Diagram C K Models AIR C O N D ITIO N IN G 1 B 2 5...
Страница 72: ...Fig IB 26 C60 System Wiring Diagram G Models...
Страница 74: ......
Страница 75: ...Fig lB 29 Motor Home Chassis Wiring Diagram THERMOSTATIC SWITCH AIR C O N D ITIO N IN G IB 2 9...
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Страница 129: ...Fig 2D 5 Typical 05 and 0 6 Vans...
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Страница 148: ...Fig 2D 51 Rear Door Controls...
Страница 158: ...Fig 2D 79 Folding Top Assembly...
Страница 159: ...Fig 2D 80 Folding Top Side Moldings and Header...
Страница 161: ...Fig 2D 85 Dnver s Bucket Seat 14 Fig 2D 86 Passenger s Bucket Seat 14...
Страница 162: ...Fig 2D 89 Rear Folding Seat 06 Fig 2D 9 0 Rear Bench Seat 14...
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Страница 248: ...Fig 3B 77 Removing Bearing Housing Pivot Pins Fig 3B 79 Replacing Lock Bolt Spring...
Страница 278: ...C 10 G 10 20 C 20 30 G 30 P 10 30 9 Fig 3C l Front Suspension C P Series...
Страница 284: ...BALL JOINT DIAGNOSTIC PROCEDURE...
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Страница 321: ...Fig 3D 12 Rear Spring Installation G Models...
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Страница 395: ...Fig 5 2 Front Brake Pipes and Hoses C K Models...
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Страница 397: ...Fig 5 4 Front Brake Pipes and Hoses P Models BRAKES 5 1 3...
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Страница 401: ...V 8 N 4 0 L 6 N 4 0...
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Страница 403: ...fryIvtcwfA POOO 4 2 MODELS lVIEW C K MODELS P 3 0 0 3 2 MODELS G MODELS Fig 5 9 Parking Brake Assembly Typical...
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Страница 405: ...P300 42 M40 JB9...
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Страница 448: ...Fig 6A 4 P Series Engine Rear Mount...
Страница 451: ...Fig 6A 8 K Series Engine Rear Mount...
Страница 452: ...ENGINE M O U N T BRACKET ALL K SERIES W ITH L 6 ENGINE 6A14 LIGHT TRUCK SERVICE M A N U A L...
Страница 483: ...FUEL PUMP PUSH ROD OILING OIL F LTER AND BY PASS VALVE...
Страница 484: ...FUEL PUMP PUSH ROD OILING CRANKCASE AND CRANKSHAFT OILING VALVE MECHANISM OILING...
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Страница 488: ...MOUNT VIEW A V AUTOMATIC TRANSMISSION FRONT MANUAL TRANSMISSION...
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Страница 599: ...CARBON c 5 PILE L VOLTMETER f m s K K K V v D BATTERY RESISTOR TEST AMMETER s S S 5 S V GENERATOR D C...
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Страница 612: ...Fig 6D 3i High Energy Ignition Basic W iring...
Страница 644: ......
Страница 647: ...Fig 6E 1 Vacuum Hose Schematic L6 250 CID LD Emissions DISTRIBUTOR PCV VALVE MANIFOLD VAC FITTING...
Страница 648: ...DISTRIBUTOR VALVE Fig 6E 3 Vacuum Hose Schematic L6 292 CID Calif HD Emissions...
Страница 649: ...V A LV E Fig 6E 5 Vacuum Hose Schematic V8 305 CID HD Emissions...
Страница 650: ...Fig 6E 7 Vacuum Hose Schematic V8 350 CID High Altitude Calif LD Emissions...
Страница 651: ...VALVE Fig 6E 9 Vacuum Hose Schematic V8 350 400 CID Except Calif HD Emissions...
Страница 652: ...CANISTER...
Страница 653: ...PCV V AL VE Fig 6E 13 Vacuum Hose Schematic V8 454 CID Except Calif HD Emissions...
Страница 672: ...Fig 6E 29 Air Cleaner 305 350 400 V8 CK...
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Страница 691: ...SPECIAL TOOLS n 1 J 25077 1 Vibrator Include Catalyst Container and Fill Tube Extension 2 J 25077 2 Aspirator...
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Страница 700: ...Fig 7A 6B Detent Downshift Cable C K and P Series...
Страница 709: ...Fig 7 A 12B CBC 350 Hydraulic Circuit A U TO M A T IC T R A N S M IS S IO N 7 A 1 7...
Страница 743: ...VIEW B FLAT IvEwfDl l6 G tO 2 GAGE...
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Страница 755: ...V I E W B WITH AUTOMATIC TRANSMISSION WITH MANUAL TRANSMISSION V I E W A...
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Страница 767: ...V I E W D 1 6 ENGINE VIEW V 8 ENGINE...
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Страница 790: ...STOPLAMP SWITCH See Section 5 Brakes of this manual for adjustment and replacement procedures G MODELS...
Страница 794: ...G A S G A U G E...
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Страница 836: ...Fig 8 58 Seat Belt Reminder System Schematic...
Страница 844: ...C H E C K n...
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Страница 853: ...SPECIAL TOOLS J 2 3 5 2 0...