Actron CP7665 Operations Instructions download pdf (Page 15)

Starting/Charging System Testing

The starting system “turns over” the engine. It consists of the battery, starter

motor, starter solenoid and/or relay, and associated wiring and connections.

The charging system keeps the battery charged when the engine is running.

This system consists of the alternator, voltage regulator, battery, and

associated wiring and connections. The digital multimeter is a useful tool for

checking the operation of these systems.

No Load Battery Test

Before you do any starting/charging

system checks, you must first test

the battery to make sure it is fully

charged.

Test Procedure (see Fig. 17):

Fig. 17

Black

Red

1. Turn Ignition Key OFF.

2. Turn ON headlights for 10 sec-

onds to dissipate battery sur-

face charge.

3. Insert BLACK test lead into

COM test lead jack.

4. Insert RED test lead into

test lead jack.

5. Disconnect positive (+) battery

cable.

6. Connect RED test lead to posi-

tive (+) terminal of battery.

Connect BLACK test lead to

negative (-) terminal of battery.

8. Turn multimeter rotary switch

to 20V DC range.

9. View reading on display.

10.Test Results.

Compare display reading in Step

9 with the following chart.

Percent

Voltage Battery is Charged

12.60V

or greater 100%

12.45V 75%

12.30V 50%

12.15V 25%

If battery is not 100% charged, then

charge it before doing anymore start-

ing/charging system tests.

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Actron CP7665 Operations Instructions Page 15

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