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１３
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6-8Cyl, Under 300 CID
180-210 Amp, Maximum
6-8Cyl, Over 300 CID
250 Amp, Maximum
Charging System Tests
[1] Battery (+)
This test checks for alternator output voltage at the battery.
·
Set the rotary switch to
Voltage .
·
Connect the positive (+) lead to the positive (+) battery terminal.
·
Connect the negative (-) lead to the negative (-) battery terminal.
·
Mark sure all vehicle accessories are turned OFF.
·
Start the engine and hold at 1500RPM.
A reading of 13.1-15.5 volts is an acceptable charging rate, If the voltage is low
check for:
·
Loose, cracked, or glazed drive belt .
·
Loose or faulty wires or connectors.
·
Defective alternator or regulator. See [2] Alternator Voltage Output (+),
Loaded.
[2] Alternator Voltage Output (+), loaded
This test checks for alternator output voltage. This test is necessary only if the
vehicle failed [1] Battery (+) test.
·
Set the rotary switch to the Voltage setting.
·
Connect the positive (+) lead to the battery (B+) output post on the back of the
alternator.
·
Connect the negative (-) lead to the negative (-)battery terminal.
·
Start the engine and hold a 1500RPM.
A reading of 13.1-15.5 volts is an acceptable Charging rate.
[3] Alternator Amperage (A) Output, Battery
This test checks for alternator charging rate efficiency at the battery.
·
Connect cureent Clamp (RPM-100, option) leads to the meter .
·
Connect the Current Clamp around the negative (-) or positive (+) battery
cable .
·
Set the rotary switch to the Voltage setting .
NOTE: 1mV=1Amp
·
Mark sure all vehicle accessories are turned OFF.
·
Start the engine and hold at 1500 RPM.
The Amperage reading should be 5 amps or better.
NOTE:
The current clamp measures amps in the direction of electrical flow. Make sure
the arrow on the clamp is pointed in the direction of the current flow in the cable.
Quick Test
:
Place the clamp on the battery cable , then turn the headlights on. If the reading is not
negative, disconnect the clamp, turn it over and reconnect.
Ignition System Tests
[1] Ignition Coil, Primary Resistance Test (
Ω
).
This test checks primary winding resistance.
IMPORTANT:
Test the ignition coil cold and hot.
·
Set the rotary switch to the Resistance (
Ω
) setting.
