Cranking Circuit Voltage Loss Test; Charging System Voltage - Sears 161.216300 Owner's Manual

CRANKING CIRCUIT VOLTAGE LOSS TEST,
THE CRANK1NG CIRCUIT VOLTAGE LOSS TEST
checks for voltage losses in the cranking system,
1. Perform the instructions listed under "Electrical
System -- Preliminary Checks,"
2. Disable the engine from starting as explained in your
vehicle service manual. See Figure 13.
3. Function Selector - Dwell/Points
4. Range Selector - Points/Low Volts
5. Use the Green and Black clipswhile referring to Figure
12. Connect the clips alternately between 1 and 2,
2 and 3, 4 and 5, 4 and 6, 6 and 7, 7 and 8, 7 and 9",
8 and 9, and 8 and !0, Record the results at each point
as read on the 3.2 volt scale of the meter with the
engine cranking.
6. if the meter reads backwards (left of zero) during
testing, reverse the Green and Black clip connections.
7. During this test, no reading should be higher than
0.2 volt.
8. To restart the engine, reverse the "Disabling Pro*
cedure."
9, If any reading is significantly higher than 0.2 volts,"
check the cable or connections involved. Clean and
tighten the connections. Replace broken, cracked or
corroded parts when needed.
" The reading between 7 and 9, the starter solenoid
voltage drop, may be a little h{gher than 0.2 volts and
be satisfactory. Refer to your vehicle manua! for
specifications.
CHARGINL_ _Y_ 1_M VUL i/_L_I;:
It is the function of the charging system to keep the battery
charged when the engine is running and to power the
rest of the vehicle's electrical load requirement (ignition,
lights, fan, etc), If this system fails, the result will be a
discharged or possibly"dead" battery.
!. Connect the analyzer to the vehicle as shownin Figure
!, and 3 through !0, The AMP LEAD AND SHUNT
hookup is not necessary,
2. Function Selector - Volts
3. Start the engine and allow it to warm to normal oper-
ating temperature. Operate it at curb idle.
4. With all accessories off observe the 16 volt scale on
the analyzer.
5. Normal Result - 13.2 to 15.2 volts or as specified in the
vehicle service manual,
6, Function Selector - RPM, 4, 6, or 8 cylinder to match
engine under test.
7. Range Selector - O_Y_)O0 RPM
8. Select a step on the fast idle cam which will maintain
engine speed between t800 and 2800 RPM, or have
'an assistant hold engine speed in this range, Hold this
speed through Step 12,
9, Function Selector - Volts {
10. Observe the 16 volt scale on the analyzer. The voltage
should not have changed from Step 5 more than about
.5 volts,
11. Load the electrical system by turning on the lights,
HI fan, and wipers.
12. Observe the 16 volt scale on the analyzer, Voltage_
should not drop below about 13.0 volts,
Cranking Circuit Voltage Loss, Typical Circuit
F|GURE 12
NOTE
This is a representative sample of one type of cranking circuit,
Your vehicle may use a difle_en_ (_iTcuit with dif|erent com-
ponents or locations,