Amp Lead And Shunt Hookup Requirement; Miscellaneous Voltage Tests; Ignition System Tests - Sears 161.216300 Owner's Manual

13. Shut off all accessories, return the engine to curb
idle, and shut it off.
14. If the results obtained in Steps 5, 10, or 12 are signifi -
cantly different from those shown or vehicle service
manual values, further diagnosis may be required:
see your vehicle service manual.
AMP LEAD AND SHUNT HOOKUP REQUIREMENT
If the results obtained in the CHARGING SYSTEM
VOLTAGE Test indicated a problem with the charging
system, it may be necessary to measure the alternator
output current to determine if the alternator is functioning
properly. To do this, follow the test procedure as outlined
in your vehicle service manual; since the procedure is
unique to each vehicle,
To use the 2163 Sears Analyzer for the alternator output
test, the following procedure describes the method of
connecting the current shunt to the charging system.
1, Disconnect negative (-) battery cable.
2. Remove the alternator output wire(s) from the output
terminal of the alternator.
3, Connect the removed wire(s) to the shunt as shown in
Figure 1, using #!0-32 x Vzto _Y4" hardware as shown.
4, Attach the slotted end of the shunt,to the alternator
output terminal.
5, Make sure all connections are clean and tight and that
NO PART OF THE SHUNT OR CONNECTIONS ARE
TOUCHING VEHICLE GROUND.
6+ Re-connect the negative (-) battery cable.
7. Connect the remainder of the analyzer's leads to the
vehicle as shown in Figures 1, and 3 through i0.
8. Function Selector- Amps
9. Perform the following steps to assure that the shunt is
connected to the Amp Lead in the proper polarity.
1. Engine off.
2. Function Selector- Volts
3. ObserVe the reading on the 16 volt scale of the
analyzer,
4. Start the engine. Wait a few moments and observe
the reading on the 16 volt scare. If it is higher than
Step 3, go to "A" below. !f it is lower than Step 3, go
to "B" below.
"A" FunctiOn Selector - Amps, Observe the meter
pointer movement. If it is above the "O" at the left
hand side of the meter scale, polarity is correct. If it
deflects below "O", shut off the engine and reverse
the "slip on" connections at the shunt. Be careful
not to let pliers or Shunt touch ground when re-
versing these connections.
"B" Function Selector - Amps, Observe the meter
pointer movement, If it is below the "O +' a t the left
hand side of the meter scale, polarity is correct.
If it is above the "O", shut off the engine and
reverse the "3fip on" connections at the shunt. Be
careful not to let pliers or shunt touch ground when
reversing these connections.
10. Perform the charging system test procedure as
described in your vehicle service manual. Switch
the Function and Range Selectors to obtain other
MISCELLANEOUS VOLTAGE TESTS
This analyzer can perform many of the voltage tests called
out in the vehicle service mandal, such as voltages at
lamp sockets, motors, solenoids and relays.
1. To measure voltage on the 16 volt scale:
+ Function Selector - Volts
/
+ Red clip * positive (+)
t Black clip - negative (-) ground
2. To measure voltage on the 3.2 volt scale:
• Function Selector - Dwell/Points
• Range Selector - Points/Low Volts
• Green clip + positive (+)
• Black clip - Negative (-) ground
NOTE
The voltmeter functions of this instrument can be used
anywhere the vehicle service manual calls for voltage
measurement except in those applications which call
for 10 Megohm input impedance or a digital voltmeter.
i,,,,.,, '
IGNITION SYSTEM TESTS
1. Primary Coil Voltage
(a) if the engine cranks normally, but does not start,
a low voltage (or no voltage) may be measured at
the coil primary (+ terminal), Look for poor (or no)
connection to the ignition Switch, wiring harness,
or (bulkhead) connectors,
(b) If the engine starts, but dies immediately upon
releasing the key, the ballast resistor may beopen
(or changed value). A fqll explanation for trouble-
shooting this problem will be found in your vehicfe
service manual.
2, Breaker Point Resistance Test (Breaker Point Systems
Only),
Visually check the breaker point and associated wiring
and connections. Check to see that the lead from the
distributor to the Negative (+) terminal of the ignition
cotl is not damaged (nicked insulation etc.), Remove
the distributor cap and inspect the breaker points,
Properly adjusted breaker points become light gray
in color in normal use. If they are blued, blackened
or pitted, they have exceeded their normal _ife,
(a) To prevent the engine from starting, disable the
ignition system by grounding the coil tower wire
as shown below.
Disabling Procedure,
Breaker Point Ignllion System
Ct_t IDC 4
ENGINE
GROUND