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ENGINE-ELECTRICAL 6Y-T2
should read high in one direction and low in the
other.
Fig. 9 c— Delcotron Diode and Field Test
or open field or shorted diode but will not in
dicate a failed open diode. If output was low
and following tests show good, refer to service
operations to determine cause and repair.
1. Disconnect battery ground cable at battery.
2. Positive diodes (Test A) connect an ohmmeter be
tween “ R” terminal and “ BAT” terminal and note
reading, then reverse the leads at same terminals
and note this reading. Meter should read high re
sistance in one direction and low in the other.
3. Negative diodes (Test B) connect ohmmeter between
“ R” terminal and “ GRD” and note reading, then
reverse the leads and note this reading. Meter
NOTE:
A high or low reading in both directions
indicates a defective diode.
4. Open Field Check:
a. Connect an ohmmeter from " F ” terminal to
“ GRD” terminal stud and note reading on the
lowest range scale. Meter should read 7 to 20
ohms.
b. If meter reads zero or excessively high re s is
tance the Delcotron is faulty.
5. If above tests indicate a defective Delcotron, remove
and completely check Delcotron as outlined under
“ Service Operations.”
INDICATOR LAMP/INITIAL FIELD
EXCITATION CIRCUIT TESTS
5.5"-6.2" Systems
On standard models the indicator lamp circuit provides
initial field excitation (causing lamp to glow). The light
is cancelled by closing the field relay which applies
battery voltage to both sides of bulb (bulb goes out).
The indicator light should glow when ignition switch
is “ON” and go out almost immediately when engine
starts.
Ammeter equipped vehicles use the same initial field
excitation and control circuits as the indicator lamp
except the lamp is omitted. The continuity tests on both
type vehicles can be made as follows:
If Lamp Fails to Glow or Ammeter Fails to Function
the Possible Causes are:
1. Faulty bulb or bulb socket.
2. Faulty ammeter.
3. An open circuit in wiring, regulator, or field.
4. A shorted positive diode - (may also cause glow
Fig . 10c—In itia l Field Excitatio n C irc u it Tests
CHEVROLET TRUCK SERVICE M ANUAL
Содержание 10 Series 1967
Страница 1: ...CHASSIS V3 a n s W U gw...
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Страница 39: ...HEATER AND AIR CONDITIONING 1A 11 EVAPORATOR OUTLET Fig 20 Airflow Schematic CHEVROLET TRUCK SERVICE MANUAL...
Страница 80: ...BODY IB 18 Fig 41 Exploded View of Level Ride Seat CHEVROLET TRUCK SERVICE MANUAL...
Страница 89: ...BODY IB 27 CHEVROLET TRUCK SERVICE MANUAL...
Страница 105: ...BODY IB 43 Fig 94 Check Link Assembly Typical CHEVROLET TRUCK SERVICE MANUAL...
Страница 117: ...BODY IB 55 Fig 116 A uxiliary Seat CHEVROLET TRUCK SERVICE MANUAL...
Страница 121: ...Fig 4 1 0 3 0 Series Truck Frame...
Страница 122: ...Fig 5 4 0 6 0 Single A xle Truck Frames Exc T ilt Cab FRAME 2 4...
Страница 124: ...CHEVROLET TRUCK SERVICE MANUAL 1 Ficu 7 4 0 6 0 Series T ilt Cab Truck Frames FRAME 2 6...
Страница 128: ...CHEVROLET TRUCK SERVICE MANUAL Fig 8 Underbody Reference Points and Dimensions Chevy Van G10 and 20 FRAME 2 10...
Страница 207: ...REAR SUSPENSION AND DRIVE LINE 4 49 Fig 91 Tandem Rear Axles and Power Divider CHEVROLET TRUCK SERVICE MANUAL...
Страница 228: ...BRAKES 5 12 TD 50 60 Fig 23 Parking Brake Cables T Models CHEVROLET TRUCK SERVICE MANUAL...
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Страница 336: ...ENGINE FUEL 6M 12 CHEVROLET TRUCK SERVICE MANUAL...
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Страница 393: ...CHEVROLET TRUCK SERVICE MANUAL CLUTCHES AND TRANSMISSIONS 7 7...
Страница 452: ...FUEL TANK AND EXHAUST SYSTEMS 8 6 Fig 7 Fuel Lines and Filter CD50 60 CHEVROLET TRUCK SERVICE MANUAL...
Страница 472: ...STEERING 9 18 Fig 31 Typical Power Steering Hose Routing CHEVROLET TRUCK SERVICE MANUAL...
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Страница 506: ...ELECTRICAL BODY AND CHASSIS 12 6 VIEW C Fig 9 Front Lighting Assemblies CHEVROLET TRUCK SERVICE MANUAL...
Страница 532: ...ELECTRICAL BODY AND CHASSIS 12 32 Fig 42 Engine Compartment PT 20 30 CHEVROLET TRUCK SERVICE MANUAL...
Страница 535: ...ELECTRICAL BODY AND CHASSIS 12 35 Fig 45 Engine Compartment CS40 50 60 MS60 CHEVROLET TRUCK SERVICE MANUAL...
Страница 561: ...ELECTRICAL BODY AND CHASSIS 12 61 18 DG 18 DG Fig 71 Instrument Panel G A 10 20 CHEVROLET TRUCK SERVICE MANUAL...
Страница 562: ...ELECTRICAL BODY AND CHASSIS 12 62 Fig 72 Engine and Tail Lamps G A 10 20 CHEVROLET TRUCK SERVICE MANUAL...
Страница 566: ...ELECTRICAL BODY AND CHASSIS 12 66 Fig 76 Engine Compartment SE50 60 CHEVROLET TRUCK SERVICE MANUAL...
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Страница 587: ...SPECIFICATIONS 7 ENGINE SECTION 6 8 25 1 on CE TE400 Series CHEVROLET TRUCK SERVICE MANUAL...
Страница 590: ...SPECIFICATIONS 10 ENGINE TORQUES CHEVROLET TRUCK SERVICE MANUAL...